xref: /packages/providers/ContactsProvider/src/com/android/providers/contacts/ContactsProvider2.java

/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License
 */

package com.android.providers.contacts;

import com.android.common.content.ProjectionMap;
import com.android.common.content.SyncStateContentProviderHelper;
import com.android.providers.contacts.ContactLookupKey.LookupKeySegment;
import com.android.providers.contacts.ContactsDatabaseHelper.AccountsColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.AggregatedPresenceColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.AggregationExceptionColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.Clauses;
import com.android.providers.contacts.ContactsDatabaseHelper.ContactsColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.ContactsStatusUpdatesColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.DataColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.DataUsageStatColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.DbProperties;
import com.android.providers.contacts.ContactsDatabaseHelper.GroupsColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.Joins;
import com.android.providers.contacts.ContactsDatabaseHelper.NameLookupColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.NameLookupType;
import com.android.providers.contacts.ContactsDatabaseHelper.PhoneLookupColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.PhotoFilesColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.PresenceColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.Projections;
import com.android.providers.contacts.ContactsDatabaseHelper.RawContactsColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.SearchIndexColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.SettingsColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.StatusUpdatesColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.StreamItemPhotosColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.StreamItemsColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.Tables;
import com.android.providers.contacts.ContactsDatabaseHelper.ViewGroupsColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.Views;
import com.android.providers.contacts.SearchIndexManager.FtsQueryBuilder;
import com.android.providers.contacts.aggregation.ContactAggregator;
import com.android.providers.contacts.aggregation.ContactAggregator.AggregationSuggestionParameter;
import com.android.providers.contacts.aggregation.util.CommonNicknameCache;
import com.android.providers.contacts.aggregation.ProfileAggregator;
import com.android.providers.contacts.util.Clock;
import com.android.providers.contacts.util.DbQueryUtils;
import com.android.providers.contacts.util.NeededForTesting;
import com.android.vcard.VCardComposer;
import com.android.vcard.VCardConfig;
import com.google.android.collect.Lists;
import com.google.android.collect.Maps;
import com.google.android.collect.Sets;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;

import android.accounts.Account;
import android.accounts.AccountManager;
import android.accounts.OnAccountsUpdateListener;
import android.app.SearchManager;
import android.content.CancellationSignal;
import android.content.ContentProviderOperation;
import android.content.ContentProviderResult;
import android.content.ContentResolver;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.IContentService;
import android.content.OperationApplicationException;
import android.content.SharedPreferences;
import android.content.SyncAdapterType;
import android.content.UriMatcher;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.ProviderInfo;
import android.content.res.AssetFileDescriptor;
import android.content.res.Resources;
import android.content.res.Resources.NotFoundException;
import android.database.AbstractCursor;
import android.database.Cursor;
import android.database.DatabaseUtils;
import android.database.MatrixCursor;
import android.database.MatrixCursor.RowBuilder;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDoneException;
import android.database.sqlite.SQLiteQueryBuilder;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.net.Uri.Builder;
import android.os.AsyncTask;
import android.os.Binder;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Message;
import android.os.ParcelFileDescriptor;
import android.os.ParcelFileDescriptor.AutoCloseInputStream;
import android.os.Process;
import android.os.RemoteException;
import android.os.StrictMode;
import android.os.SystemClock;
import android.os.SystemProperties;
import android.preference.PreferenceManager;
import android.provider.BaseColumns;
import android.provider.ContactsContract;
import android.provider.ContactsContract.AggregationExceptions;
import android.provider.ContactsContract.Authorization;
import android.provider.ContactsContract.CommonDataKinds.Email;
import android.provider.ContactsContract.CommonDataKinds.GroupMembership;
import android.provider.ContactsContract.CommonDataKinds.Im;
import android.provider.ContactsContract.CommonDataKinds.Nickname;
import android.provider.ContactsContract.CommonDataKinds.Note;
import android.provider.ContactsContract.CommonDataKinds.Organization;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.provider.ContactsContract.CommonDataKinds.Photo;
import android.provider.ContactsContract.CommonDataKinds.SipAddress;
import android.provider.ContactsContract.CommonDataKinds.StructuredName;
import android.provider.ContactsContract.CommonDataKinds.StructuredPostal;
import android.provider.ContactsContract.ContactCounts;
import android.provider.ContactsContract.Contacts;
import android.provider.ContactsContract.Contacts.AggregationSuggestions;
import android.provider.ContactsContract.Data;
import android.provider.ContactsContract.DataUsageFeedback;
import android.provider.ContactsContract.Directory;
import android.provider.ContactsContract.DisplayPhoto;
import android.provider.ContactsContract.Groups;
import android.provider.ContactsContract.PhoneLookup;
import android.provider.ContactsContract.PhotoFiles;
import android.provider.ContactsContract.Profile;
import android.provider.ContactsContract.ProviderStatus;
import android.provider.ContactsContract.RawContacts;
import android.provider.ContactsContract.RawContactsEntity;
import android.provider.ContactsContract.SearchSnippetColumns;
import android.provider.ContactsContract.Settings;
import android.provider.ContactsContract.StatusUpdates;
import android.provider.ContactsContract.StreamItemPhotos;
import android.provider.ContactsContract.StreamItems;
import android.provider.OpenableColumns;
import android.provider.SyncStateContract;
import android.telephony.PhoneNumberUtils;
import android.telephony.TelephonyManager;
import android.text.TextUtils;
import android.util.Log;

import java.io.BufferedWriter;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.security.SecureRandom;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.CountDownLatch;

/**
 * Contacts content provider. The contract between this provider and applications
 * is defined in {@link ContactsContract}.
 */
public class ContactsProvider2 extends AbstractContactsProvider
        implements OnAccountsUpdateListener {

    private static final int BACKGROUND_TASK_INITIALIZE = 0;
    private static final int BACKGROUND_TASK_OPEN_WRITE_ACCESS = 1;
    private static final int BACKGROUND_TASK_UPDATE_ACCOUNTS = 3;
    private static final int BACKGROUND_TASK_UPDATE_LOCALE = 4;
    private static final int BACKGROUND_TASK_UPGRADE_AGGREGATION_ALGORITHM = 5;
    private static final int BACKGROUND_TASK_UPDATE_SEARCH_INDEX = 6;
    private static final int BACKGROUND_TASK_UPDATE_PROVIDER_STATUS = 7;
    private static final int BACKGROUND_TASK_UPDATE_DIRECTORIES = 8;
    private static final int BACKGROUND_TASK_CHANGE_LOCALE = 9;
    private static final int BACKGROUND_TASK_CLEANUP_PHOTOS = 10;

    /** Default for the maximum number of returned aggregation suggestions. */
    private static final int DEFAULT_MAX_SUGGESTIONS = 5;

    /** Limit for the maximum number of social stream items to store under a raw contact. */
    private static final int MAX_STREAM_ITEMS_PER_RAW_CONTACT = 5;

    /** Rate limit (in ms) for photo cleanup.  Do it at most once per day. */
    private static final int PHOTO_CLEANUP_RATE_LIMIT = 24 * 60 * 60 * 1000;

    /**
     * Default expiration duration for pre-authorized URIs.  May be overridden from a secure
     * setting.
     */
    private static final int DEFAULT_PREAUTHORIZED_URI_EXPIRATION = 5 * 60 * 1000;

    /**
     * Random URI parameter that will be appended to preauthorized URIs for uniqueness.
     */
    private static final String PREAUTHORIZED_URI_TOKEN = "perm_token";

    private static final String PREF_LOCALE = "locale";

    private static final int PROPERTY_AGGREGATION_ALGORITHM_VERSION = 2;

    private static final String AGGREGATE_CONTACTS = "sync.contacts.aggregate";

    /**
     * If set to "1", we don't remove account data when accounts have been removed.
     *
     * This should be used sparingly; even though there are data still available, the UI
     * don't know anything about them, so they won't show up in the contact filter screen, and
     * the contact card/editor may get confused to see unknown custom mimetypes.
     *
     * We can't spell it out because a property name must be less than 32 chars.
     */
    private static final String DEBUG_PROPERTY_KEEP_STALE_ACCOUNT_DATA =
            "debug.contacts.ksad";

    private static final ProfileAwareUriMatcher sUriMatcher =
            new ProfileAwareUriMatcher(UriMatcher.NO_MATCH);

    /**
     * Used to insert a column into strequent results, which enables SQL to sort the list using
     * the total times contacted. See also {@link #sStrequentFrequentProjectionMap}.
     */
    private static final String TIMES_USED_SORT_COLUMN = "times_used_sort";

    private static final String FREQUENT_ORDER_BY = DataUsageStatColumns.TIMES_USED + " DESC,"
            + Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";

    /* package */ static final String UPDATE_TIMES_CONTACTED_CONTACTS_TABLE =
            "UPDATE " + Tables.CONTACTS + " SET " + Contacts.TIMES_CONTACTED + "=" +
            " ifnull(" + Contacts.TIMES_CONTACTED + ",0)+1" +
            " WHERE " + Contacts._ID + "=?";

    /* package */ static final String UPDATE_TIMES_CONTACTED_RAWCONTACTS_TABLE =
            "UPDATE " + Tables.RAW_CONTACTS + " SET " + RawContacts.TIMES_CONTACTED + "=" +
            " ifnull(" + RawContacts.TIMES_CONTACTED + ",0)+1 " +
            " WHERE " + RawContacts.CONTACT_ID + "=?";

    /* package */ static final String PHONEBOOK_COLLATOR_NAME = "PHONEBOOK";

    // Regex for splitting query strings - we split on any group of non-alphanumeric characters,
    // excluding the @ symbol.
    /* package */ static final String QUERY_TOKENIZER_REGEX = "[^\\w@]+";

    private static final int CONTACTS = 1000;
    private static final int CONTACTS_ID = 1001;
    private static final int CONTACTS_LOOKUP = 1002;
    private static final int CONTACTS_LOOKUP_ID = 1003;
    private static final int CONTACTS_ID_DATA = 1004;
    private static final int CONTACTS_FILTER = 1005;
    private static final int CONTACTS_STREQUENT = 1006;
    private static final int CONTACTS_STREQUENT_FILTER = 1007;
    private static final int CONTACTS_GROUP = 1008;
    private static final int CONTACTS_ID_PHOTO = 1009;
    private static final int CONTACTS_LOOKUP_PHOTO = 1010;
    private static final int CONTACTS_LOOKUP_ID_PHOTO = 1011;
    private static final int CONTACTS_ID_DISPLAY_PHOTO = 1012;
    private static final int CONTACTS_LOOKUP_DISPLAY_PHOTO = 1013;
    private static final int CONTACTS_LOOKUP_ID_DISPLAY_PHOTO = 1014;
    private static final int CONTACTS_AS_VCARD = 1015;
    private static final int CONTACTS_AS_MULTI_VCARD = 1016;
    private static final int CONTACTS_LOOKUP_DATA = 1017;
    private static final int CONTACTS_LOOKUP_ID_DATA = 1018;
    private static final int CONTACTS_ID_ENTITIES = 1019;
    private static final int CONTACTS_LOOKUP_ENTITIES = 1020;
    private static final int CONTACTS_LOOKUP_ID_ENTITIES = 1021;
    private static final int CONTACTS_ID_STREAM_ITEMS = 1022;
    private static final int CONTACTS_LOOKUP_STREAM_ITEMS = 1023;
    private static final int CONTACTS_LOOKUP_ID_STREAM_ITEMS = 1024;
    private static final int CONTACTS_FREQUENT = 1025;
    private static final int CONTACTS_DELETE_USAGE = 1026;

    private static final int RAW_CONTACTS = 2002;
    private static final int RAW_CONTACTS_ID = 2003;
    private static final int RAW_CONTACTS_ID_DATA = 2004;
    private static final int RAW_CONTACT_ID_ENTITY = 2005;
    private static final int RAW_CONTACTS_ID_DISPLAY_PHOTO = 2006;
    private static final int RAW_CONTACTS_ID_STREAM_ITEMS = 2007;
    private static final int RAW_CONTACTS_ID_STREAM_ITEMS_ID = 2008;

    private static final int DATA = 3000;
    private static final int DATA_ID = 3001;
    private static final int PHONES = 3002;
    private static final int PHONES_ID = 3003;
    private static final int PHONES_FILTER = 3004;
    private static final int EMAILS = 3005;
    private static final int EMAILS_ID = 3006;
    private static final int EMAILS_LOOKUP = 3007;
    private static final int EMAILS_FILTER = 3008;
    private static final int POSTALS = 3009;
    private static final int POSTALS_ID = 3010;
    private static final int CALLABLES = 3011;
    private static final int CALLABLES_ID = 3012;
    private static final int CALLABLES_FILTER = 3013;

    private static final int PHONE_LOOKUP = 4000;

    private static final int AGGREGATION_EXCEPTIONS = 6000;
    private static final int AGGREGATION_EXCEPTION_ID = 6001;

    private static final int STATUS_UPDATES = 7000;
    private static final int STATUS_UPDATES_ID = 7001;

    private static final int AGGREGATION_SUGGESTIONS = 8000;

    private static final int SETTINGS = 9000;

    private static final int GROUPS = 10000;
    private static final int GROUPS_ID = 10001;
    private static final int GROUPS_SUMMARY = 10003;

    private static final int SYNCSTATE = 11000;
    private static final int SYNCSTATE_ID = 11001;
    private static final int PROFILE_SYNCSTATE = 11002;
    private static final int PROFILE_SYNCSTATE_ID = 11003;

    private static final int SEARCH_SUGGESTIONS = 12001;
    private static final int SEARCH_SHORTCUT = 12002;

    private static final int RAW_CONTACT_ENTITIES = 15001;

    private static final int PROVIDER_STATUS = 16001;

    private static final int DIRECTORIES = 17001;
    private static final int DIRECTORIES_ID = 17002;

    private static final int COMPLETE_NAME = 18000;

    private static final int PROFILE = 19000;
    private static final int PROFILE_ENTITIES = 19001;
    private static final int PROFILE_DATA = 19002;
    private static final int PROFILE_DATA_ID = 19003;
    private static final int PROFILE_AS_VCARD = 19004;
    private static final int PROFILE_RAW_CONTACTS = 19005;
    private static final int PROFILE_RAW_CONTACTS_ID = 19006;
    private static final int PROFILE_RAW_CONTACTS_ID_DATA = 19007;
    private static final int PROFILE_RAW_CONTACTS_ID_ENTITIES = 19008;
    private static final int PROFILE_STATUS_UPDATES = 19009;
    private static final int PROFILE_RAW_CONTACT_ENTITIES = 19010;
    private static final int PROFILE_PHOTO = 19011;
    private static final int PROFILE_DISPLAY_PHOTO = 19012;

    private static final int DATA_USAGE_FEEDBACK_ID = 20001;

    private static final int STREAM_ITEMS = 21000;
    private static final int STREAM_ITEMS_PHOTOS = 21001;
    private static final int STREAM_ITEMS_ID = 21002;
    private static final int STREAM_ITEMS_ID_PHOTOS = 21003;
    private static final int STREAM_ITEMS_ID_PHOTOS_ID = 21004;
    private static final int STREAM_ITEMS_LIMIT = 21005;

    private static final int DISPLAY_PHOTO_ID = 22000;
    private static final int PHOTO_DIMENSIONS = 22001;

    // Inserts into URIs in this map will direct to the profile database if the parent record's
    // value (looked up from the ContentValues object with the key specified by the value in this
    // map) is in the profile ID-space (see {@link ProfileDatabaseHelper#PROFILE_ID_SPACE}).
    private static final Map<Integer, String> INSERT_URI_ID_VALUE_MAP = Maps.newHashMap();
    static {
        INSERT_URI_ID_VALUE_MAP.put(DATA, Data.RAW_CONTACT_ID);
        INSERT_URI_ID_VALUE_MAP.put(RAW_CONTACTS_ID_DATA, Data.RAW_CONTACT_ID);
        INSERT_URI_ID_VALUE_MAP.put(STATUS_UPDATES, StatusUpdates.DATA_ID);
        INSERT_URI_ID_VALUE_MAP.put(STREAM_ITEMS, StreamItems.RAW_CONTACT_ID);
        INSERT_URI_ID_VALUE_MAP.put(RAW_CONTACTS_ID_STREAM_ITEMS, StreamItems.RAW_CONTACT_ID);
        INSERT_URI_ID_VALUE_MAP.put(STREAM_ITEMS_PHOTOS, StreamItemPhotos.STREAM_ITEM_ID);
        INSERT_URI_ID_VALUE_MAP.put(STREAM_ITEMS_ID_PHOTOS, StreamItemPhotos.STREAM_ITEM_ID);
    }

    // Any interactions that involve these URIs will also require the calling package to have either
    // android.permission.READ_SOCIAL_STREAM permission or android.permission.WRITE_SOCIAL_STREAM
    // permission, depending on the type of operation being performed.
    private static final List<Integer> SOCIAL_STREAM_URIS = Lists.newArrayList(
            CONTACTS_ID_STREAM_ITEMS,
            CONTACTS_LOOKUP_STREAM_ITEMS,
            CONTACTS_LOOKUP_ID_STREAM_ITEMS,
            RAW_CONTACTS_ID_STREAM_ITEMS,
            RAW_CONTACTS_ID_STREAM_ITEMS_ID,
            STREAM_ITEMS,
            STREAM_ITEMS_PHOTOS,
            STREAM_ITEMS_ID,
            STREAM_ITEMS_ID_PHOTOS,
            STREAM_ITEMS_ID_PHOTOS_ID
    );

    private static final String SELECTION_FAVORITES_GROUPS_BY_RAW_CONTACT_ID =
            RawContactsColumns.CONCRETE_ID + "=? AND "
                + GroupsColumns.CONCRETE_ACCOUNT_ID + "=" + RawContactsColumns.CONCRETE_ACCOUNT_ID
                + " AND " + Groups.FAVORITES + " != 0";

    private static final String SELECTION_AUTO_ADD_GROUPS_BY_RAW_CONTACT_ID =
            RawContactsColumns.CONCRETE_ID + "=? AND "
                + GroupsColumns.CONCRETE_ACCOUNT_ID + "=" + RawContactsColumns.CONCRETE_ACCOUNT_ID
                + " AND " + Groups.AUTO_ADD + " != 0";

    private static final String[] PROJECTION_GROUP_ID
            = new String[]{Tables.GROUPS + "." + Groups._ID};

    private static final String SELECTION_GROUPMEMBERSHIP_DATA = DataColumns.MIMETYPE_ID + "=? "
            + "AND " + GroupMembership.GROUP_ROW_ID + "=? "
            + "AND " + GroupMembership.RAW_CONTACT_ID + "=?";

    private static final String SELECTION_STARRED_FROM_RAW_CONTACTS =
            "SELECT " + RawContacts.STARRED
                    + " FROM " + Tables.RAW_CONTACTS + " WHERE " + RawContacts._ID + "=?";

    private interface DataContactsQuery {
        public static final String TABLE = "data "
                + "JOIN raw_contacts ON (data.raw_contact_id = raw_contacts._id) "
                + "JOIN " + Tables.ACCOUNTS + " ON ("
                    + AccountsColumns.CONCRETE_ID + "=" + RawContactsColumns.CONCRETE_ACCOUNT_ID
                    + ")"
                + "JOIN contacts ON (raw_contacts.contact_id = contacts._id)";

        public static final String[] PROJECTION = new String[] {
            RawContactsColumns.CONCRETE_ID,
            AccountsColumns.CONCRETE_ACCOUNT_TYPE,
            AccountsColumns.CONCRETE_ACCOUNT_NAME,
            AccountsColumns.CONCRETE_DATA_SET,
            DataColumns.CONCRETE_ID,
            ContactsColumns.CONCRETE_ID
        };

        public static final int RAW_CONTACT_ID = 0;
        public static final int ACCOUNT_TYPE = 1;
        public static final int ACCOUNT_NAME = 2;
        public static final int DATA_SET = 3;
        public static final int DATA_ID = 4;
        public static final int CONTACT_ID = 5;
    }

    interface RawContactsQuery {
        String TABLE = Tables.RAW_CONTACTS_JOIN_ACCOUNTS;

        String[] COLUMNS = new String[] {
                RawContacts.DELETED,
                RawContactsColumns.ACCOUNT_ID,
                AccountsColumns.CONCRETE_ACCOUNT_TYPE,
                AccountsColumns.CONCRETE_ACCOUNT_NAME,
                AccountsColumns.CONCRETE_DATA_SET,
        };

        int DELETED = 0;
        int ACCOUNT_ID = 1;
        int ACCOUNT_TYPE = 2;
        int ACCOUNT_NAME = 3;
        int DATA_SET = 4;
    }

    public static final String DEFAULT_ACCOUNT_TYPE = "com.google";

    /** Sql where statement for filtering on groups. */
    private static final String CONTACTS_IN_GROUP_SELECT =
            Contacts._ID + " IN "
                    + "(SELECT " + RawContacts.CONTACT_ID
                    + " FROM " + Tables.RAW_CONTACTS
                    + " WHERE " + RawContactsColumns.CONCRETE_ID + " IN "
                            + "(SELECT " + DataColumns.CONCRETE_RAW_CONTACT_ID
                            + " FROM " + Tables.DATA_JOIN_MIMETYPES
                            + " WHERE " + DataColumns.MIMETYPE_ID + "=?"
                                    + " AND " + GroupMembership.GROUP_ROW_ID + "="
                                    + "(SELECT " + Tables.GROUPS + "." + Groups._ID
                                    + " FROM " + Tables.GROUPS
                                    + " WHERE " + Groups.TITLE + "=?)))";

    /** Sql for updating DIRTY flag on multiple raw contacts */
    private static final String UPDATE_RAW_CONTACT_SET_DIRTY_SQL =
            "UPDATE " + Tables.RAW_CONTACTS +
            " SET " + RawContacts.DIRTY + "=1" +
            " WHERE " + RawContacts._ID + " IN (";

    /** Sql for updating VERSION on multiple raw contacts */
    private static final String UPDATE_RAW_CONTACT_SET_VERSION_SQL =
            "UPDATE " + Tables.RAW_CONTACTS +
            " SET " + RawContacts.VERSION + " = " + RawContacts.VERSION + " + 1" +
            " WHERE " + RawContacts._ID + " IN (";

    // Current contacts - those contacted within the last 3 days (in seconds)
    private static final long EMAIL_FILTER_CURRENT = 3 * 24 * 60 * 60;

    // Recent contacts - those contacted within the last 30 days (in seconds)
    private static final long EMAIL_FILTER_RECENT = 30 * 24 * 60 * 60;

    private static final String TIME_SINCE_LAST_USED =
            "(strftime('%s', 'now') - " + DataUsageStatColumns.LAST_TIME_USED + "/1000)";

    /*
     * Sorting order for email address suggestions: first starred, then the rest.
     * Within the two groups:
     * - three buckets: very recently contacted, then fairly recently contacted, then the rest.
     * Within each of the bucket - descending count of times contacted (both for data row and for
     * contact row).
     * If all else fails, in_visible_group, alphabetical.
     * (Super)primary email address is returned before other addresses for the same contact.
     */
    private static final String EMAIL_FILTER_SORT_ORDER =
        Contacts.STARRED + " DESC, "
        + "(CASE WHEN " + TIME_SINCE_LAST_USED + " < " + EMAIL_FILTER_CURRENT
        + " THEN 0 "
                + " WHEN " + TIME_SINCE_LAST_USED + " < " + EMAIL_FILTER_RECENT
        + " THEN 1 "
        + " ELSE 2 END), "
        + DataUsageStatColumns.TIMES_USED + " DESC, "
        + Contacts.IN_VISIBLE_GROUP + " DESC, "
        + Contacts.DISPLAY_NAME + ", "
        + Data.CONTACT_ID + ", "
        + Data.IS_SUPER_PRIMARY + " DESC, "
        + Data.IS_PRIMARY + " DESC";

    /** Currently same as {@link #EMAIL_FILTER_SORT_ORDER} */
    private static final String PHONE_FILTER_SORT_ORDER = EMAIL_FILTER_SORT_ORDER;

    /** Name lookup types used for contact filtering */
    private static final String CONTACT_LOOKUP_NAME_TYPES =
            NameLookupType.NAME_COLLATION_KEY + "," +
            NameLookupType.EMAIL_BASED_NICKNAME + "," +
            NameLookupType.NICKNAME;

    /**
     * If any of these columns are used in a Data projection, there is no point in
     * using the DISTINCT keyword, which can negatively affect performance.
     */
    private static final String[] DISTINCT_DATA_PROHIBITING_COLUMNS = {
            Data._ID,
            Data.RAW_CONTACT_ID,
            Data.NAME_RAW_CONTACT_ID,
            RawContacts.ACCOUNT_NAME,
            RawContacts.ACCOUNT_TYPE,
            RawContacts.DATA_SET,
            RawContacts.ACCOUNT_TYPE_AND_DATA_SET,
            RawContacts.DIRTY,
            RawContacts.NAME_VERIFIED,
            RawContacts.SOURCE_ID,
            RawContacts.VERSION,
    };

    private static final ProjectionMap sContactsColumns = ProjectionMap.builder()
            .add(Contacts.CUSTOM_RINGTONE)
            .add(Contacts.DISPLAY_NAME)
            .add(Contacts.DISPLAY_NAME_ALTERNATIVE)
            .add(Contacts.DISPLAY_NAME_SOURCE)
            .add(Contacts.IN_VISIBLE_GROUP)
            .add(Contacts.LAST_TIME_CONTACTED)
            .add(Contacts.LOOKUP_KEY)
            .add(Contacts.PHONETIC_NAME)
            .add(Contacts.PHONETIC_NAME_STYLE)
            .add(Contacts.PHOTO_ID)
            .add(Contacts.PHOTO_FILE_ID)
            .add(Contacts.PHOTO_URI)
            .add(Contacts.PHOTO_THUMBNAIL_URI)
            .add(Contacts.SEND_TO_VOICEMAIL)
            .add(Contacts.SORT_KEY_ALTERNATIVE)
            .add(Contacts.SORT_KEY_PRIMARY)
            .add(Contacts.STARRED)
            .add(Contacts.TIMES_CONTACTED)
            .add(Contacts.HAS_PHONE_NUMBER)
            .build();

    private static final ProjectionMap sContactsPresenceColumns = ProjectionMap.builder()
            .add(Contacts.CONTACT_PRESENCE,
                    Tables.AGGREGATED_PRESENCE + "." + StatusUpdates.PRESENCE)
            .add(Contacts.CONTACT_CHAT_CAPABILITY,
                    Tables.AGGREGATED_PRESENCE + "." + StatusUpdates.CHAT_CAPABILITY)
            .add(Contacts.CONTACT_STATUS,
                    ContactsStatusUpdatesColumns.CONCRETE_STATUS)
            .add(Contacts.CONTACT_STATUS_TIMESTAMP,
                    ContactsStatusUpdatesColumns.CONCRETE_STATUS_TIMESTAMP)
            .add(Contacts.CONTACT_STATUS_RES_PACKAGE,
                    ContactsStatusUpdatesColumns.CONCRETE_STATUS_RES_PACKAGE)
            .add(Contacts.CONTACT_STATUS_LABEL,
                    ContactsStatusUpdatesColumns.CONCRETE_STATUS_LABEL)
            .add(Contacts.CONTACT_STATUS_ICON,
                    ContactsStatusUpdatesColumns.CONCRETE_STATUS_ICON)
            .build();

    private static final ProjectionMap sSnippetColumns = ProjectionMap.builder()
            .add(SearchSnippetColumns.SNIPPET)
            .build();

    private static final ProjectionMap sRawContactColumns = ProjectionMap.builder()
            .add(RawContacts.ACCOUNT_NAME)
            .add(RawContacts.ACCOUNT_TYPE)
            .add(RawContacts.DATA_SET)
            .add(RawContacts.ACCOUNT_TYPE_AND_DATA_SET)
            .add(RawContacts.DIRTY)
            .add(RawContacts.NAME_VERIFIED)
            .add(RawContacts.SOURCE_ID)
            .add(RawContacts.VERSION)
            .build();

    private static final ProjectionMap sRawContactSyncColumns = ProjectionMap.builder()
            .add(RawContacts.SYNC1)
            .add(RawContacts.SYNC2)
            .add(RawContacts.SYNC3)
            .add(RawContacts.SYNC4)
            .build();

    private static final ProjectionMap sDataColumns = ProjectionMap.builder()
            .add(Data.DATA1)
            .add(Data.DATA2)
            .add(Data.DATA3)
            .add(Data.DATA4)
            .add(Data.DATA5)
            .add(Data.DATA6)
            .add(Data.DATA7)
            .add(Data.DATA8)
            .add(Data.DATA9)
            .add(Data.DATA10)
            .add(Data.DATA11)
            .add(Data.DATA12)
            .add(Data.DATA13)
            .add(Data.DATA14)
            .add(Data.DATA15)
            .add(Data.DATA_VERSION)
            .add(Data.IS_PRIMARY)
            .add(Data.IS_SUPER_PRIMARY)
            .add(Data.MIMETYPE)
            .add(Data.RES_PACKAGE)
            .add(Data.SYNC1)
            .add(Data.SYNC2)
            .add(Data.SYNC3)
            .add(Data.SYNC4)
            .add(GroupMembership.GROUP_SOURCE_ID)
            .build();

    private static final ProjectionMap sContactPresenceColumns = ProjectionMap.builder()
            .add(Contacts.CONTACT_PRESENCE,
                    Tables.AGGREGATED_PRESENCE + '.' + StatusUpdates.PRESENCE)
            .add(Contacts.CONTACT_CHAT_CAPABILITY,
                    Tables.AGGREGATED_PRESENCE + '.' + StatusUpdates.CHAT_CAPABILITY)
            .add(Contacts.CONTACT_STATUS,
                    ContactsStatusUpdatesColumns.CONCRETE_STATUS)
            .add(Contacts.CONTACT_STATUS_TIMESTAMP,
                    ContactsStatusUpdatesColumns.CONCRETE_STATUS_TIMESTAMP)
            .add(Contacts.CONTACT_STATUS_RES_PACKAGE,
                    ContactsStatusUpdatesColumns.CONCRETE_STATUS_RES_PACKAGE)
            .add(Contacts.CONTACT_STATUS_LABEL,
                    ContactsStatusUpdatesColumns.CONCRETE_STATUS_LABEL)
            .add(Contacts.CONTACT_STATUS_ICON,
                    ContactsStatusUpdatesColumns.CONCRETE_STATUS_ICON)
            .build();

    private static final ProjectionMap sDataPresenceColumns = ProjectionMap.builder()
            .add(Data.PRESENCE, Tables.PRESENCE + "." + StatusUpdates.PRESENCE)
            .add(Data.CHAT_CAPABILITY, Tables.PRESENCE + "." + StatusUpdates.CHAT_CAPABILITY)
            .add(Data.STATUS, StatusUpdatesColumns.CONCRETE_STATUS)
            .add(Data.STATUS_TIMESTAMP, StatusUpdatesColumns.CONCRETE_STATUS_TIMESTAMP)
            .add(Data.STATUS_RES_PACKAGE, StatusUpdatesColumns.CONCRETE_STATUS_RES_PACKAGE)
            .add(Data.STATUS_LABEL, StatusUpdatesColumns.CONCRETE_STATUS_LABEL)
            .add(Data.STATUS_ICON, StatusUpdatesColumns.CONCRETE_STATUS_ICON)
            .build();

    /** Contains just BaseColumns._COUNT */
    private static final ProjectionMap sCountProjectionMap = ProjectionMap.builder()
            .add(BaseColumns._COUNT, "COUNT(*)")
            .build();

    /** Contains just the contacts columns */
    private static final ProjectionMap sContactsProjectionMap = ProjectionMap.builder()
            .add(Contacts._ID)
            .add(Contacts.HAS_PHONE_NUMBER)
            .add(Contacts.NAME_RAW_CONTACT_ID)
            .add(Contacts.IS_USER_PROFILE)
            .addAll(sContactsColumns)
            .addAll(sContactsPresenceColumns)
            .build();

    /** Contains just the contacts columns */
    private static final ProjectionMap sContactsProjectionWithSnippetMap = ProjectionMap.builder()
            .addAll(sContactsProjectionMap)
            .addAll(sSnippetColumns)
            .build();

    /** Used for pushing starred contacts to the top of a times contacted list **/
    private static final ProjectionMap sStrequentStarredProjectionMap = ProjectionMap.builder()
            .addAll(sContactsProjectionMap)
            .add(TIMES_USED_SORT_COLUMN, String.valueOf(Long.MAX_VALUE))
            .build();

    private static final ProjectionMap sStrequentFrequentProjectionMap = ProjectionMap.builder()
            .addAll(sContactsProjectionMap)
            .add(TIMES_USED_SORT_COLUMN, "SUM(" + DataUsageStatColumns.CONCRETE_TIMES_USED + ")")
            .build();

    /**
     * Used for Strequent Uri with {@link ContactsContract#STREQUENT_PHONE_ONLY}, which allows
     * users to obtain part of Data columns. Right now Starred part just returns NULL for
     * those data columns (frequent part should return real ones in data table).
     **/
    private static final ProjectionMap sStrequentPhoneOnlyStarredProjectionMap
            = ProjectionMap.builder()
            .addAll(sContactsProjectionMap)
            .add(TIMES_USED_SORT_COLUMN, String.valueOf(Long.MAX_VALUE))
            .add(Phone.NUMBER, "NULL")
            .add(Phone.TYPE, "NULL")
            .add(Phone.LABEL, "NULL")
            .build();

    /**
     * Used for Strequent Uri with {@link ContactsContract#STREQUENT_PHONE_ONLY}, which allows
     * users to obtain part of Data columns. We hard-code {@link Contacts#IS_USER_PROFILE} to NULL,
     * because sContactsProjectionMap specifies a field that doesn't exist in the view behind the
     * query that uses this projection map.
     **/
    private static final ProjectionMap sStrequentPhoneOnlyFrequentProjectionMap
            = ProjectionMap.builder()
            .addAll(sContactsProjectionMap)
            .add(TIMES_USED_SORT_COLUMN, DataUsageStatColumns.CONCRETE_TIMES_USED)
            .add(Phone.NUMBER)
            .add(Phone.TYPE)
            .add(Phone.LABEL)
            .add(Contacts.IS_USER_PROFILE, "NULL")
            .build();

    /** Contains just the contacts vCard columns */
    private static final ProjectionMap sContactsVCardProjectionMap = ProjectionMap.builder()
            .add(Contacts._ID)
            .add(OpenableColumns.DISPLAY_NAME, Contacts.DISPLAY_NAME + " || '.vcf'")
            .add(OpenableColumns.SIZE, "NULL")
            .build();

    /** Contains just the raw contacts columns */
    private static final ProjectionMap sRawContactsProjectionMap = ProjectionMap.builder()
            .add(RawContacts._ID)
            .add(RawContacts.CONTACT_ID)
            .add(RawContacts.DELETED)
            .add(RawContacts.DISPLAY_NAME_PRIMARY)
            .add(RawContacts.DISPLAY_NAME_ALTERNATIVE)
            .add(RawContacts.DISPLAY_NAME_SOURCE)
            .add(RawContacts.PHONETIC_NAME)
            .add(RawContacts.PHONETIC_NAME_STYLE)
            .add(RawContacts.SORT_KEY_PRIMARY)
            .add(RawContacts.SORT_KEY_ALTERNATIVE)
            .add(RawContacts.TIMES_CONTACTED)
            .add(RawContacts.LAST_TIME_CONTACTED)
            .add(RawContacts.CUSTOM_RINGTONE)
            .add(RawContacts.SEND_TO_VOICEMAIL)
            .add(RawContacts.STARRED)
            .add(RawContacts.AGGREGATION_MODE)
            .add(RawContacts.RAW_CONTACT_IS_USER_PROFILE)
            .addAll(sRawContactColumns)
            .addAll(sRawContactSyncColumns)
            .build();

    /** Contains the columns from the raw entity view*/
    private static final ProjectionMap sRawEntityProjectionMap = ProjectionMap.builder()
            .add(RawContacts._ID)
            .add(RawContacts.CONTACT_ID)
            .add(RawContacts.Entity.DATA_ID)
            .add(RawContacts.DELETED)
            .add(RawContacts.STARRED)
            .add(RawContacts.RAW_CONTACT_IS_USER_PROFILE)
            .addAll(sRawContactColumns)
            .addAll(sRawContactSyncColumns)
            .addAll(sDataColumns)
            .build();

    /** Contains the columns from the contact entity view*/
    private static final ProjectionMap sEntityProjectionMap = ProjectionMap.builder()
            .add(Contacts.Entity._ID)
            .add(Contacts.Entity.CONTACT_ID)
            .add(Contacts.Entity.RAW_CONTACT_ID)
            .add(Contacts.Entity.DATA_ID)
            .add(Contacts.Entity.NAME_RAW_CONTACT_ID)
            .add(Contacts.Entity.DELETED)
            .add(Contacts.IS_USER_PROFILE)
            .addAll(sContactsColumns)
            .addAll(sContactPresenceColumns)
            .addAll(sRawContactColumns)
            .addAll(sRawContactSyncColumns)
            .addAll(sDataColumns)
            .addAll(sDataPresenceColumns)
            .build();

    /** Contains columns in PhoneLookup which are not contained in the data view. */
    private static final ProjectionMap sSipLookupColumns = ProjectionMap.builder()
            .add(PhoneLookup.NUMBER, SipAddress.SIP_ADDRESS)
            .add(PhoneLookup.TYPE, "0")
            .add(PhoneLookup.LABEL, "NULL")
            .add(PhoneLookup.NORMALIZED_NUMBER, "NULL")
            .build();

    /** Contains columns from the data view */
    private static final ProjectionMap sDataProjectionMap = ProjectionMap.builder()
            .add(Data._ID)
            .add(Data.RAW_CONTACT_ID)
            .add(Data.CONTACT_ID)
            .add(Data.NAME_RAW_CONTACT_ID)
            .add(RawContacts.RAW_CONTACT_IS_USER_PROFILE)
            .addAll(sDataColumns)
            .addAll(sDataPresenceColumns)
            .addAll(sRawContactColumns)
            .addAll(sContactsColumns)
            .addAll(sContactPresenceColumns)
            .build();

    /** Contains columns from the data view used for SIP address lookup. */
    private static final ProjectionMap sDataSipLookupProjectionMap = ProjectionMap.builder()
            .addAll(sDataProjectionMap)
            .addAll(sSipLookupColumns)
            .build();

    /** Contains columns from the data view */
    private static final ProjectionMap sDistinctDataProjectionMap = ProjectionMap.builder()
            .add(Data._ID, "MIN(" + Data._ID + ")")
            .add(RawContacts.CONTACT_ID)
            .add(RawContacts.RAW_CONTACT_IS_USER_PROFILE)
            .addAll(sDataColumns)
            .addAll(sDataPresenceColumns)
            .addAll(sContactsColumns)
            .addAll(sContactPresenceColumns)
            .build();

    /** Contains columns from the data view used for SIP address lookup. */
    private static final ProjectionMap sDistinctDataSipLookupProjectionMap = ProjectionMap.builder()
            .addAll(sDistinctDataProjectionMap)
            .addAll(sSipLookupColumns)
            .build();

    /** Contains the data and contacts columns, for joined tables */
    private static final ProjectionMap sPhoneLookupProjectionMap = ProjectionMap.builder()
            .add(PhoneLookup._ID, "contacts_view." + Contacts._ID)
            .add(PhoneLookup.LOOKUP_KEY, "contacts_view." + Contacts.LOOKUP_KEY)
            .add(PhoneLookup.DISPLAY_NAME, "contacts_view." + Contacts.DISPLAY_NAME)
            .add(PhoneLookup.LAST_TIME_CONTACTED, "contacts_view." + Contacts.LAST_TIME_CONTACTED)
            .add(PhoneLookup.TIMES_CONTACTED, "contacts_view." + Contacts.TIMES_CONTACTED)
            .add(PhoneLookup.STARRED, "contacts_view." + Contacts.STARRED)
            .add(PhoneLookup.IN_VISIBLE_GROUP, "contacts_view." + Contacts.IN_VISIBLE_GROUP)
            .add(PhoneLookup.PHOTO_ID, "contacts_view." + Contacts.PHOTO_ID)
            .add(PhoneLookup.PHOTO_URI, "contacts_view." + Contacts.PHOTO_URI)
            .add(PhoneLookup.PHOTO_THUMBNAIL_URI, "contacts_view." + Contacts.PHOTO_THUMBNAIL_URI)
            .add(PhoneLookup.CUSTOM_RINGTONE, "contacts_view." + Contacts.CUSTOM_RINGTONE)
            .add(PhoneLookup.HAS_PHONE_NUMBER, "contacts_view." + Contacts.HAS_PHONE_NUMBER)
            .add(PhoneLookup.SEND_TO_VOICEMAIL, "contacts_view." + Contacts.SEND_TO_VOICEMAIL)
            .add(PhoneLookup.NUMBER, Phone.NUMBER)
            .add(PhoneLookup.TYPE, Phone.TYPE)
            .add(PhoneLookup.LABEL, Phone.LABEL)
            .add(PhoneLookup.NORMALIZED_NUMBER, Phone.NORMALIZED_NUMBER)
            .build();

    /** Contains the just the {@link Groups} columns */
    private static final ProjectionMap sGroupsProjectionMap = ProjectionMap.builder()
            .add(Groups._ID)
            .add(Groups.ACCOUNT_NAME)
            .add(Groups.ACCOUNT_TYPE)
            .add(Groups.DATA_SET)
            .add(Groups.ACCOUNT_TYPE_AND_DATA_SET)
            .add(Groups.SOURCE_ID)
            .add(Groups.DIRTY)
            .add(Groups.VERSION)
            .add(Groups.RES_PACKAGE)
            .add(Groups.TITLE)
            .add(Groups.TITLE_RES)
            .add(Groups.GROUP_VISIBLE)
            .add(Groups.SYSTEM_ID)
            .add(Groups.DELETED)
            .add(Groups.NOTES)
            .add(Groups.SHOULD_SYNC)
            .add(Groups.FAVORITES)
            .add(Groups.AUTO_ADD)
            .add(Groups.GROUP_IS_READ_ONLY)
            .add(Groups.SYNC1)
            .add(Groups.SYNC2)
            .add(Groups.SYNC3)
            .add(Groups.SYNC4)
            .build();

    /**
     * Contains {@link Groups} columns along with summary details.
     *
     * Note {@link Groups#SUMMARY_COUNT} doesn't exist in groups/view_groups.
     * When we detect this column being requested, we join {@link Joins#GROUP_MEMBER_COUNT} to
     * generate it.
     *
     * TODO Support SUMMARY_GROUP_COUNT_PER_ACCOUNT too.  See also queryLocal().
     */
    private static final ProjectionMap sGroupsSummaryProjectionMap = ProjectionMap.builder()
            .addAll(sGroupsProjectionMap)
            .add(Groups.SUMMARY_COUNT, "ifnull(group_member_count, 0)")
            .add(Groups.SUMMARY_WITH_PHONES,
                    "(SELECT COUNT(" + ContactsColumns.CONCRETE_ID + ") FROM "
                        + Tables.CONTACTS_JOIN_RAW_CONTACTS_DATA_FILTERED_BY_GROUPMEMBERSHIP
                        + " WHERE " + Contacts.HAS_PHONE_NUMBER + ")")
            .add(Groups.SUMMARY_GROUP_COUNT_PER_ACCOUNT, "0") // Always returns 0 for now.
            .build();

    /** Contains the agg_exceptions columns */
    private static final ProjectionMap sAggregationExceptionsProjectionMap = ProjectionMap.builder()
            .add(AggregationExceptionColumns._ID, Tables.AGGREGATION_EXCEPTIONS + "._id")
            .add(AggregationExceptions.TYPE)
            .add(AggregationExceptions.RAW_CONTACT_ID1)
            .add(AggregationExceptions.RAW_CONTACT_ID2)
            .build();

    /** Contains the agg_exceptions columns */
    private static final ProjectionMap sSettingsProjectionMap = ProjectionMap.builder()
            .add(Settings.ACCOUNT_NAME)
            .add(Settings.ACCOUNT_TYPE)
            .add(Settings.DATA_SET)
            .add(Settings.UNGROUPED_VISIBLE)
            .add(Settings.SHOULD_SYNC)
            .add(Settings.ANY_UNSYNCED,
                    "(CASE WHEN MIN(" + Settings.SHOULD_SYNC
                        + ",(SELECT "
                                + "(CASE WHEN MIN(" + Groups.SHOULD_SYNC + ") IS NULL"
                                + " THEN 1"
                                + " ELSE MIN(" + Groups.SHOULD_SYNC + ")"
                                + " END)"
                            + " FROM " + Views.GROUPS
                            + " WHERE " + ViewGroupsColumns.CONCRETE_ACCOUNT_NAME + "="
                                    + SettingsColumns.CONCRETE_ACCOUNT_NAME
                                + " AND " + ViewGroupsColumns.CONCRETE_ACCOUNT_TYPE + "="
                                    + SettingsColumns.CONCRETE_ACCOUNT_TYPE
                                + " AND ((" + ViewGroupsColumns.CONCRETE_DATA_SET + " IS NULL AND "
                                    + SettingsColumns.CONCRETE_DATA_SET + " IS NULL) OR ("
                                    + ViewGroupsColumns.CONCRETE_DATA_SET + "="
                                    + SettingsColumns.CONCRETE_DATA_SET + "))))=0"
                    + " THEN 1"
                    + " ELSE 0"
                    + " END)")
            .add(Settings.UNGROUPED_COUNT,
                    "(SELECT COUNT(*)"
                    + " FROM (SELECT 1"
                            + " FROM " + Tables.SETTINGS_JOIN_RAW_CONTACTS_DATA_MIMETYPES_CONTACTS
                            + " GROUP BY " + Clauses.GROUP_BY_ACCOUNT_CONTACT_ID
                            + " HAVING " + Clauses.HAVING_NO_GROUPS
                    + "))")
            .add(Settings.UNGROUPED_WITH_PHONES,
                    "(SELECT COUNT(*)"
                    + " FROM (SELECT 1"
                            + " FROM " + Tables.SETTINGS_JOIN_RAW_CONTACTS_DATA_MIMETYPES_CONTACTS
                            + " WHERE " + Contacts.HAS_PHONE_NUMBER
                            + " GROUP BY " + Clauses.GROUP_BY_ACCOUNT_CONTACT_ID
                            + " HAVING " + Clauses.HAVING_NO_GROUPS
                    + "))")
            .build();

    /** Contains StatusUpdates columns */
    private static final ProjectionMap sStatusUpdatesProjectionMap = ProjectionMap.builder()
            .add(PresenceColumns.RAW_CONTACT_ID)
            .add(StatusUpdates.DATA_ID, DataColumns.CONCRETE_ID)
            .add(StatusUpdates.IM_ACCOUNT)
            .add(StatusUpdates.IM_HANDLE)
            .add(StatusUpdates.PROTOCOL)
            // We cannot allow a null in the custom protocol field, because SQLite3 does not
            // properly enforce uniqueness of null values
            .add(StatusUpdates.CUSTOM_PROTOCOL,
                    "(CASE WHEN " + StatusUpdates.CUSTOM_PROTOCOL + "=''"
                    + " THEN NULL"
                    + " ELSE " + StatusUpdates.CUSTOM_PROTOCOL + " END)")
            .add(StatusUpdates.PRESENCE)
            .add(StatusUpdates.CHAT_CAPABILITY)
            .add(StatusUpdates.STATUS)
            .add(StatusUpdates.STATUS_TIMESTAMP)
            .add(StatusUpdates.STATUS_RES_PACKAGE)
            .add(StatusUpdates.STATUS_ICON)
            .add(StatusUpdates.STATUS_LABEL)
            .build();

    /** Contains StreamItems columns */
    private static final ProjectionMap sStreamItemsProjectionMap = ProjectionMap.builder()
            .add(StreamItems._ID)
            .add(StreamItems.CONTACT_ID)
            .add(StreamItems.CONTACT_LOOKUP_KEY)
            .add(StreamItems.ACCOUNT_NAME)
            .add(StreamItems.ACCOUNT_TYPE)
            .add(StreamItems.DATA_SET)
            .add(StreamItems.RAW_CONTACT_ID)
            .add(StreamItems.RAW_CONTACT_SOURCE_ID)
            .add(StreamItems.RES_PACKAGE)
            .add(StreamItems.RES_ICON)
            .add(StreamItems.RES_LABEL)
            .add(StreamItems.TEXT)
            .add(StreamItems.TIMESTAMP)
            .add(StreamItems.COMMENTS)
            .add(StreamItems.SYNC1)
            .add(StreamItems.SYNC2)
            .add(StreamItems.SYNC3)
            .add(StreamItems.SYNC4)
            .build();

    private static final ProjectionMap sStreamItemPhotosProjectionMap = ProjectionMap.builder()
            .add(StreamItemPhotos._ID, StreamItemPhotosColumns.CONCRETE_ID)
            .add(StreamItems.RAW_CONTACT_ID)
            .add(StreamItems.RAW_CONTACT_SOURCE_ID, RawContactsColumns.CONCRETE_SOURCE_ID)
            .add(StreamItemPhotos.STREAM_ITEM_ID)
            .add(StreamItemPhotos.SORT_INDEX)
            .add(StreamItemPhotos.PHOTO_FILE_ID)
            .add(StreamItemPhotos.PHOTO_URI,
                    "'" + DisplayPhoto.CONTENT_URI + "'||'/'||" + StreamItemPhotos.PHOTO_FILE_ID)
            .add(PhotoFiles.HEIGHT)
            .add(PhotoFiles.WIDTH)
            .add(PhotoFiles.FILESIZE)
            .add(StreamItemPhotos.SYNC1)
            .add(StreamItemPhotos.SYNC2)
            .add(StreamItemPhotos.SYNC3)
            .add(StreamItemPhotos.SYNC4)
            .build();

    /** Contains {@link Directory} columns */
    private static final ProjectionMap sDirectoryProjectionMap = ProjectionMap.builder()
            .add(Directory._ID)
            .add(Directory.PACKAGE_NAME)
            .add(Directory.TYPE_RESOURCE_ID)
            .add(Directory.DISPLAY_NAME)
            .add(Directory.DIRECTORY_AUTHORITY)
            .add(Directory.ACCOUNT_TYPE)
            .add(Directory.ACCOUNT_NAME)
            .add(Directory.EXPORT_SUPPORT)
            .add(Directory.SHORTCUT_SUPPORT)
            .add(Directory.PHOTO_SUPPORT)
            .build();

    // where clause to update the status_updates table
    private static final String WHERE_CLAUSE_FOR_STATUS_UPDATES_TABLE =
            StatusUpdatesColumns.DATA_ID + " IN (SELECT Distinct " + StatusUpdates.DATA_ID +
            " FROM " + Tables.STATUS_UPDATES + " LEFT OUTER JOIN " + Tables.PRESENCE +
            " ON " + StatusUpdatesColumns.DATA_ID + " = " + StatusUpdates.DATA_ID + " WHERE ";

    private static final String[] EMPTY_STRING_ARRAY = new String[0];

    /**
     * Notification ID for failure to import contacts.
     */
    private static final int LEGACY_IMPORT_FAILED_NOTIFICATION = 1;

    private static final String DEFAULT_SNIPPET_ARG_START_MATCH = "[";
    private static final String DEFAULT_SNIPPET_ARG_END_MATCH = "]";
    private static final String DEFAULT_SNIPPET_ARG_ELLIPSIS = "...";
    private static final int DEFAULT_SNIPPET_ARG_MAX_TOKENS = -10;

    private boolean mIsPhoneInitialized;
    private boolean mIsPhone;

    private final StringBuilder mSb = new StringBuilder();
    private final String[] mSelectionArgs1 = new String[1];
    private final String[] mSelectionArgs2 = new String[2];
    private final String[] mSelectionArgs3 = new String[3];
    private final String[] mSelectionArgs4 = new String[4];
    private final ArrayList<String> mSelectionArgs = Lists.newArrayList();

    private Account mAccount;

    static {
        // Contacts URI matching table
        final UriMatcher matcher = sUriMatcher;
        matcher.addURI(ContactsContract.AUTHORITY, "contacts", CONTACTS);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/#", CONTACTS_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/#/data", CONTACTS_ID_DATA);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/#/entities", CONTACTS_ID_ENTITIES);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/#/suggestions",
                AGGREGATION_SUGGESTIONS);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/#/suggestions/*",
                AGGREGATION_SUGGESTIONS);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/#/photo", CONTACTS_ID_PHOTO);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/#/display_photo",
                CONTACTS_ID_DISPLAY_PHOTO);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/#/stream_items",
                CONTACTS_ID_STREAM_ITEMS);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/filter", CONTACTS_FILTER);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/filter/*", CONTACTS_FILTER);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*", CONTACTS_LOOKUP);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/data", CONTACTS_LOOKUP_DATA);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/photo",
                CONTACTS_LOOKUP_PHOTO);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/#", CONTACTS_LOOKUP_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/#/data",
                CONTACTS_LOOKUP_ID_DATA);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/#/photo",
                CONTACTS_LOOKUP_ID_PHOTO);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/display_photo",
                CONTACTS_LOOKUP_DISPLAY_PHOTO);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/#/display_photo",
                CONTACTS_LOOKUP_ID_DISPLAY_PHOTO);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/entities",
                CONTACTS_LOOKUP_ENTITIES);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/#/entities",
                CONTACTS_LOOKUP_ID_ENTITIES);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/stream_items",
                CONTACTS_LOOKUP_STREAM_ITEMS);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/lookup/*/#/stream_items",
                CONTACTS_LOOKUP_ID_STREAM_ITEMS);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/as_vcard/*", CONTACTS_AS_VCARD);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/as_multi_vcard/*",
                CONTACTS_AS_MULTI_VCARD);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/strequent/", CONTACTS_STREQUENT);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/strequent/filter/*",
                CONTACTS_STREQUENT_FILTER);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/group/*", CONTACTS_GROUP);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/frequent", CONTACTS_FREQUENT);
        matcher.addURI(ContactsContract.AUTHORITY, "contacts/delete_usage", CONTACTS_DELETE_USAGE);

        matcher.addURI(ContactsContract.AUTHORITY, "raw_contacts", RAW_CONTACTS);
        matcher.addURI(ContactsContract.AUTHORITY, "raw_contacts/#", RAW_CONTACTS_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "raw_contacts/#/data", RAW_CONTACTS_ID_DATA);
        matcher.addURI(ContactsContract.AUTHORITY, "raw_contacts/#/display_photo",
                RAW_CONTACTS_ID_DISPLAY_PHOTO);
        matcher.addURI(ContactsContract.AUTHORITY, "raw_contacts/#/entity", RAW_CONTACT_ID_ENTITY);
        matcher.addURI(ContactsContract.AUTHORITY, "raw_contacts/#/stream_items",
                RAW_CONTACTS_ID_STREAM_ITEMS);
        matcher.addURI(ContactsContract.AUTHORITY, "raw_contacts/#/stream_items/#",
                RAW_CONTACTS_ID_STREAM_ITEMS_ID);

        matcher.addURI(ContactsContract.AUTHORITY, "raw_contact_entities", RAW_CONTACT_ENTITIES);

        matcher.addURI(ContactsContract.AUTHORITY, "data", DATA);
        matcher.addURI(ContactsContract.AUTHORITY, "data/#", DATA_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "data/phones", PHONES);
        matcher.addURI(ContactsContract.AUTHORITY, "data/phones/#", PHONES_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "data/phones/filter", PHONES_FILTER);
        matcher.addURI(ContactsContract.AUTHORITY, "data/phones/filter/*", PHONES_FILTER);
        matcher.addURI(ContactsContract.AUTHORITY, "data/emails", EMAILS);
        matcher.addURI(ContactsContract.AUTHORITY, "data/emails/#", EMAILS_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "data/emails/lookup", EMAILS_LOOKUP);
        matcher.addURI(ContactsContract.AUTHORITY, "data/emails/lookup/*", EMAILS_LOOKUP);
        matcher.addURI(ContactsContract.AUTHORITY, "data/emails/filter", EMAILS_FILTER);
        matcher.addURI(ContactsContract.AUTHORITY, "data/emails/filter/*", EMAILS_FILTER);
        matcher.addURI(ContactsContract.AUTHORITY, "data/postals", POSTALS);
        matcher.addURI(ContactsContract.AUTHORITY, "data/postals/#", POSTALS_ID);
        /** "*" is in CSV form with data ids ("123,456,789") */
        matcher.addURI(ContactsContract.AUTHORITY, "data/usagefeedback/*", DATA_USAGE_FEEDBACK_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "data/callables/", CALLABLES);
        matcher.addURI(ContactsContract.AUTHORITY, "data/callables/#", CALLABLES_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "data/callables/filter", CALLABLES_FILTER);
        matcher.addURI(ContactsContract.AUTHORITY, "data/callables/filter/*", CALLABLES_FILTER);

        matcher.addURI(ContactsContract.AUTHORITY, "groups", GROUPS);
        matcher.addURI(ContactsContract.AUTHORITY, "groups/#", GROUPS_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "groups_summary", GROUPS_SUMMARY);

        matcher.addURI(ContactsContract.AUTHORITY, SyncStateContentProviderHelper.PATH, SYNCSTATE);
        matcher.addURI(ContactsContract.AUTHORITY, SyncStateContentProviderHelper.PATH + "/#",
                SYNCSTATE_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/" + SyncStateContentProviderHelper.PATH,
                PROFILE_SYNCSTATE);
        matcher.addURI(ContactsContract.AUTHORITY,
                "profile/" + SyncStateContentProviderHelper.PATH + "/#",
                PROFILE_SYNCSTATE_ID);

        matcher.addURI(ContactsContract.AUTHORITY, "phone_lookup/*", PHONE_LOOKUP);
        matcher.addURI(ContactsContract.AUTHORITY, "aggregation_exceptions",
                AGGREGATION_EXCEPTIONS);
        matcher.addURI(ContactsContract.AUTHORITY, "aggregation_exceptions/*",
                AGGREGATION_EXCEPTION_ID);

        matcher.addURI(ContactsContract.AUTHORITY, "settings", SETTINGS);

        matcher.addURI(ContactsContract.AUTHORITY, "status_updates", STATUS_UPDATES);
        matcher.addURI(ContactsContract.AUTHORITY, "status_updates/#", STATUS_UPDATES_ID);

        matcher.addURI(ContactsContract.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY,
                SEARCH_SUGGESTIONS);
        matcher.addURI(ContactsContract.AUTHORITY, SearchManager.SUGGEST_URI_PATH_QUERY + "/*",
                SEARCH_SUGGESTIONS);
        matcher.addURI(ContactsContract.AUTHORITY, SearchManager.SUGGEST_URI_PATH_SHORTCUT + "/*",
                SEARCH_SHORTCUT);

        matcher.addURI(ContactsContract.AUTHORITY, "provider_status", PROVIDER_STATUS);

        matcher.addURI(ContactsContract.AUTHORITY, "directories", DIRECTORIES);
        matcher.addURI(ContactsContract.AUTHORITY, "directories/#", DIRECTORIES_ID);

        matcher.addURI(ContactsContract.AUTHORITY, "complete_name", COMPLETE_NAME);

        matcher.addURI(ContactsContract.AUTHORITY, "profile", PROFILE);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/entities", PROFILE_ENTITIES);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/data", PROFILE_DATA);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/data/#", PROFILE_DATA_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/photo", PROFILE_PHOTO);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/display_photo", PROFILE_DISPLAY_PHOTO);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/as_vcard", PROFILE_AS_VCARD);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/raw_contacts", PROFILE_RAW_CONTACTS);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/raw_contacts/#",
                PROFILE_RAW_CONTACTS_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/raw_contacts/#/data",
                PROFILE_RAW_CONTACTS_ID_DATA);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/raw_contacts/#/entity",
                PROFILE_RAW_CONTACTS_ID_ENTITIES);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/status_updates",
                PROFILE_STATUS_UPDATES);
        matcher.addURI(ContactsContract.AUTHORITY, "profile/raw_contact_entities",
                PROFILE_RAW_CONTACT_ENTITIES);

        matcher.addURI(ContactsContract.AUTHORITY, "stream_items", STREAM_ITEMS);
        matcher.addURI(ContactsContract.AUTHORITY, "stream_items/photo", STREAM_ITEMS_PHOTOS);
        matcher.addURI(ContactsContract.AUTHORITY, "stream_items/#", STREAM_ITEMS_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "stream_items/#/photo", STREAM_ITEMS_ID_PHOTOS);
        matcher.addURI(ContactsContract.AUTHORITY, "stream_items/#/photo/#",
                STREAM_ITEMS_ID_PHOTOS_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "stream_items_limit", STREAM_ITEMS_LIMIT);

        matcher.addURI(ContactsContract.AUTHORITY, "display_photo/#", DISPLAY_PHOTO_ID);
        matcher.addURI(ContactsContract.AUTHORITY, "photo_dimensions", PHOTO_DIMENSIONS);
    }

    private static class DirectoryInfo {
        String authority;
        String accountName;
        String accountType;
    }

    /**
     * Cached information about contact directories.
     */
    private HashMap<String, DirectoryInfo> mDirectoryCache = new HashMap<String, DirectoryInfo>();
    private boolean mDirectoryCacheValid = false;

    /**
     * An entry in group id cache.
     *
     * TODO: Move this and {@link #mGroupIdCache} to {@link DataRowHandlerForGroupMembership}.
     */
    public static class GroupIdCacheEntry {
        long accountId;
        String sourceId;
        long groupId;
    }

    /**
     * Map from group source IDs to lists of {@link GroupIdCacheEntry}s.
     *
     * We don't need a soft cache for groups - the assumption is that there will only
     * be a small number of contact groups. The cache is keyed off source id.  The value
     * is a list of groups with this group id.
     */
    private HashMap<String, ArrayList<GroupIdCacheEntry>> mGroupIdCache = Maps.newHashMap();

    /**
     * Sub-provider for handling profile requests against the profile database.
     */
    private ProfileProvider mProfileProvider;

    private NameSplitter mNameSplitter;
    private NameLookupBuilder mNameLookupBuilder;

    private PostalSplitter mPostalSplitter;

    private ContactDirectoryManager mContactDirectoryManager;

    // The database tag to use for representing the contacts DB in contacts transactions.
    /* package */ static final String CONTACTS_DB_TAG = "contacts";

    // The database tag to use for representing the profile DB in contacts transactions.
    /* package */ static final String PROFILE_DB_TAG = "profile";

    /**
     * The active (thread-local) database.  This will be switched between a contacts-specific
     * database and a profile-specific database, depending on what the current operation is
     * targeted to.
     */
    private final ThreadLocal<SQLiteDatabase> mActiveDb = new ThreadLocal<SQLiteDatabase>();

    /**
     * The thread-local holder of the active transaction.  Shared between this and the profile
     * provider, to keep transactions on both databases synchronized.
     */
    private final ThreadLocal<ContactsTransaction> mTransactionHolder =
            new ThreadLocal<ContactsTransaction>();

    // This variable keeps track of whether the current operation is intended for the profile DB.
    private final ThreadLocal<Boolean> mInProfileMode = new ThreadLocal<Boolean>();

    // Separate data row handler instances for contact data and profile data.
    private HashMap<String, DataRowHandler> mDataRowHandlers;
    private HashMap<String, DataRowHandler> mProfileDataRowHandlers;

    // Depending on whether the action being performed is for the profile, we will use one of two
    // database helper instances.
    private final ThreadLocal<ContactsDatabaseHelper> mDbHelper =
            new ThreadLocal<ContactsDatabaseHelper>();
    private ContactsDatabaseHelper mContactsHelper;
    private ProfileDatabaseHelper mProfileHelper;

    // Depending on whether the action being performed is for the profile or not, we will use one of
    // two aggregator instances.
    private final ThreadLocal<ContactAggregator> mAggregator = new ThreadLocal<ContactAggregator>();
    private ContactAggregator mContactAggregator;
    private ContactAggregator mProfileAggregator;

    // Depending on whether the action being performed is for the profile or not, we will use one of
    // two photo store instances (with their files stored in separate subdirectories).
    private final ThreadLocal<PhotoStore> mPhotoStore = new ThreadLocal<PhotoStore>();
    private PhotoStore mContactsPhotoStore;
    private PhotoStore mProfilePhotoStore;

    // The active transaction context will switch depending on the operation being performed.
    // Both transaction contexts will be cleared out when a batch transaction is started, and
    // each will be processed separately when a batch transaction completes.
    private final TransactionContext mContactTransactionContext = new TransactionContext(false);
    private final TransactionContext mProfileTransactionContext = new TransactionContext(true);
    private final ThreadLocal<TransactionContext> mTransactionContext =
            new ThreadLocal<TransactionContext>();

    // Duration in milliseconds that pre-authorized URIs will remain valid.
    private long mPreAuthorizedUriDuration;

    // Map of single-use pre-authorized URIs to expiration times.
    private final Map<Uri, Long> mPreAuthorizedUris = Maps.newHashMap();

    // Random number generator.
    private final SecureRandom mRandom = new SecureRandom();

    private LegacyApiSupport mLegacyApiSupport;
    private GlobalSearchSupport mGlobalSearchSupport;
    private CommonNicknameCache mCommonNicknameCache;
    private SearchIndexManager mSearchIndexManager;

    private final ContentValues mValues = new ContentValues();
    private final HashMap<String, Boolean> mAccountWritability = Maps.newHashMap();

    private int mProviderStatus = ProviderStatus.STATUS_NORMAL;
    private boolean mProviderStatusUpdateNeeded;
    private long mEstimatedStorageRequirement = 0;
    private volatile CountDownLatch mReadAccessLatch;
    private volatile CountDownLatch mWriteAccessLatch;
    private boolean mAccountUpdateListenerRegistered;
    private boolean mOkToOpenAccess = true;

    private boolean mVisibleTouched = false;

    private boolean mSyncToNetwork;

    private Locale mCurrentLocale;
    private int mContactsAccountCount;

    private HandlerThread mBackgroundThread;
    private Handler mBackgroundHandler;

    private long mLastPhotoCleanup = 0;

    private FastScrollingIndexCache mFastScrollingIndexCache;

    // Stats about FastScrollingIndex.
    private int mFastScrollingIndexCacheRequestCount;
    private int mFastScrollingIndexCacheMissCount;
    private long mTotalTimeFastScrollingIndexGenerate;

    @Override
    public boolean onCreate() {
        if (Log.isLoggable(Constants.PERFORMANCE_TAG, Log.DEBUG)) {
            Log.d(Constants.PERFORMANCE_TAG, "ContactsProvider2.onCreate start");
        }
        super.onCreate();
        try {
            return initialize();
        } catch (RuntimeException e) {
            Log.e(TAG, "Cannot start provider", e);
            // In production code we don't want to throw here, so that phone will still work
            // in low storage situations.
            // See I5c88a3024ff1c5a06b5756b29a2d903f8f6a2531
            if (shouldThrowExceptionForInitializationError()) {
                throw e;
            }
            return false;
        } finally {
            if (Log.isLoggable(Constants.PERFORMANCE_TAG, Log.DEBUG)) {
                Log.d(Constants.PERFORMANCE_TAG, "ContactsProvider2.onCreate finish");
            }
        }
    }

    protected boolean shouldThrowExceptionForInitializationError() {
        return false;
    }

    private boolean initialize() {
        StrictMode.setThreadPolicy(
                new StrictMode.ThreadPolicy.Builder().detectAll().penaltyLog().build());

        mFastScrollingIndexCache = new FastScrollingIndexCache(getContext());

        mContactsHelper = getDatabaseHelper(getContext());
        mDbHelper.set(mContactsHelper);

        // Set up the DB helper for keeping transactions serialized.
        setDbHelperToSerializeOn(mContactsHelper, CONTACTS_DB_TAG);

        mContactDirectoryManager = new ContactDirectoryManager(this);
        mGlobalSearchSupport = new GlobalSearchSupport(this);

        // The provider is closed for business until fully initialized
        mReadAccessLatch = new CountDownLatch(1);
        mWriteAccessLatch = new CountDownLatch(1);

        mBackgroundThread = new HandlerThread("ContactsProviderWorker",
                Process.THREAD_PRIORITY_BACKGROUND);
        mBackgroundThread.start();
        mBackgroundHandler = new Handler(mBackgroundThread.getLooper()) {
            @Override
            public void handleMessage(Message msg) {
                performBackgroundTask(msg.what, msg.obj);
            }
        };

        // Set up the sub-provider for handling profiles.
        mProfileProvider = getProfileProvider();
        mProfileProvider.setDbHelperToSerializeOn(mContactsHelper, CONTACTS_DB_TAG);
        ProviderInfo profileInfo = new ProviderInfo();
        profileInfo.readPermission = "android.permission.READ_PROFILE";
        profileInfo.writePermission = "android.permission.WRITE_PROFILE";
        mProfileProvider.attachInfo(getContext(), profileInfo);
        mProfileHelper = mProfileProvider.getDatabaseHelper(getContext());

        // Initialize the pre-authorized URI duration.
        mPreAuthorizedUriDuration = android.provider.Settings.Secure.getLong(
                getContext().getContentResolver(),
                android.provider.Settings.Secure.CONTACTS_PREAUTH_URI_EXPIRATION,
                DEFAULT_PREAUTHORIZED_URI_EXPIRATION);

        scheduleBackgroundTask(BACKGROUND_TASK_INITIALIZE);
        scheduleBackgroundTask(BACKGROUND_TASK_UPDATE_ACCOUNTS);
        scheduleBackgroundTask(BACKGROUND_TASK_UPDATE_LOCALE);
        scheduleBackgroundTask(BACKGROUND_TASK_UPGRADE_AGGREGATION_ALGORITHM);
        scheduleBackgroundTask(BACKGROUND_TASK_UPDATE_SEARCH_INDEX);
        scheduleBackgroundTask(BACKGROUND_TASK_UPDATE_PROVIDER_STATUS);
        scheduleBackgroundTask(BACKGROUND_TASK_OPEN_WRITE_ACCESS);
        scheduleBackgroundTask(BACKGROUND_TASK_CLEANUP_PHOTOS);

        return true;
    }

    /**
     * (Re)allocates all locale-sensitive structures.
     */
    private void initForDefaultLocale() {
        Context context = getContext();
        mLegacyApiSupport = new LegacyApiSupport(context, mContactsHelper, this,
                mGlobalSearchSupport);
        mCurrentLocale = getLocale();
        mNameSplitter = mContactsHelper.createNameSplitter();
        mNameLookupBuilder = new StructuredNameLookupBuilder(mNameSplitter);
        mPostalSplitter = new PostalSplitter(mCurrentLocale);
        mCommonNicknameCache = new CommonNicknameCache(mContactsHelper.getReadableDatabase());
        ContactLocaleUtils.getIntance().setLocale(mCurrentLocale);
        mContactAggregator = new ContactAggregator(this, mContactsHelper,
                createPhotoPriorityResolver(context), mNameSplitter, mCommonNicknameCache);
        mContactAggregator.setEnabled(SystemProperties.getBoolean(AGGREGATE_CONTACTS, true));
        mProfileAggregator = new ProfileAggregator(this, mProfileHelper,
                createPhotoPriorityResolver(context), mNameSplitter, mCommonNicknameCache);
        mProfileAggregator.setEnabled(SystemProperties.getBoolean(AGGREGATE_CONTACTS, true));
        mSearchIndexManager = new SearchIndexManager(this);

        mContactsPhotoStore = new PhotoStore(getContext().getFilesDir(), mContactsHelper);
        mProfilePhotoStore = new PhotoStore(new File(getContext().getFilesDir(), "profile"),
                mProfileHelper);

        mDataRowHandlers = new HashMap<String, DataRowHandler>();
        initDataRowHandlers(mDataRowHandlers, mContactsHelper, mContactAggregator,
                mContactsPhotoStore);
        mProfileDataRowHandlers = new HashMap<String, DataRowHandler>();
        initDataRowHandlers(mProfileDataRowHandlers, mProfileHelper, mProfileAggregator,
                mProfilePhotoStore);

        // Set initial thread-local state variables for the Contacts DB.
        switchToContactMode();
    }

    private void initDataRowHandlers(Map<String, DataRowHandler> handlerMap,
            ContactsDatabaseHelper dbHelper, ContactAggregator contactAggregator,
            PhotoStore photoStore) {
        Context context = getContext();
        handlerMap.put(Email.CONTENT_ITEM_TYPE,
                new DataRowHandlerForEmail(context, dbHelper, contactAggregator));
        handlerMap.put(Im.CONTENT_ITEM_TYPE,
                new DataRowHandlerForIm(context, dbHelper, contactAggregator));
        handlerMap.put(Organization.CONTENT_ITEM_TYPE,
                new DataRowHandlerForOrganization(context, dbHelper, contactAggregator));
        handlerMap.put(Phone.CONTENT_ITEM_TYPE,
                new DataRowHandlerForPhoneNumber(context, dbHelper, contactAggregator));
        handlerMap.put(Nickname.CONTENT_ITEM_TYPE,
                new DataRowHandlerForNickname(context, dbHelper, contactAggregator));
        handlerMap.put(StructuredName.CONTENT_ITEM_TYPE,
                new DataRowHandlerForStructuredName(context, dbHelper, contactAggregator,
                        mNameSplitter, mNameLookupBuilder));
        handlerMap.put(StructuredPostal.CONTENT_ITEM_TYPE,
                new DataRowHandlerForStructuredPostal(context, dbHelper, contactAggregator,
                        mPostalSplitter));
        handlerMap.put(GroupMembership.CONTENT_ITEM_TYPE,
                new DataRowHandlerForGroupMembership(context, dbHelper, contactAggregator,
                        mGroupIdCache));
        handlerMap.put(Photo.CONTENT_ITEM_TYPE,
                new DataRowHandlerForPhoto(context, dbHelper, contactAggregator, photoStore));
        handlerMap.put(Note.CONTENT_ITEM_TYPE,
                new DataRowHandlerForNote(context, dbHelper, contactAggregator));
    }

    @VisibleForTesting
    PhotoPriorityResolver createPhotoPriorityResolver(Context context) {
        return new PhotoPriorityResolver(context);
    }

    protected void scheduleBackgroundTask(int task) {
        mBackgroundHandler.sendEmptyMessage(task);
    }

    protected void scheduleBackgroundTask(int task, Object arg) {
        mBackgroundHandler.sendMessage(mBackgroundHandler.obtainMessage(task, arg));
    }

    protected void performBackgroundTask(int task, Object arg) {
        switch (task) {
            case BACKGROUND_TASK_INITIALIZE: {
                initForDefaultLocale();
                mReadAccessLatch.countDown();
                mReadAccessLatch = null;
                break;
            }

            case BACKGROUND_TASK_OPEN_WRITE_ACCESS: {
                if (mOkToOpenAccess) {
                    mWriteAccessLatch.countDown();
                    mWriteAccessLatch = null;
                }
                break;
            }

            case BACKGROUND_TASK_UPDATE_ACCOUNTS: {
                Context context = getContext();
                if (!mAccountUpdateListenerRegistered) {
                    AccountManager.get(context).addOnAccountsUpdatedListener(this, null, false);
                    mAccountUpdateListenerRegistered = true;
                }

                // Update the accounts for both the contacts and profile DBs.
                Account[] accounts = AccountManager.get(context).getAccounts();
                switchToContactMode();
                boolean accountsChanged = updateAccountsInBackground(accounts);
                switchToProfileMode();
                accountsChanged |= updateAccountsInBackground(accounts);

                updateContactsAccountCount(accounts);
                updateDirectoriesInBackground(accountsChanged);
                break;
            }

            case BACKGROUND_TASK_UPDATE_LOCALE: {
                updateLocaleInBackground();
                break;
            }

            case BACKGROUND_TASK_CHANGE_LOCALE: {
                changeLocaleInBackground();
                break;
            }

            case BACKGROUND_TASK_UPGRADE_AGGREGATION_ALGORITHM: {
                if (isAggregationUpgradeNeeded()) {
                    upgradeAggregationAlgorithmInBackground();
                }
                break;
            }

            case BACKGROUND_TASK_UPDATE_SEARCH_INDEX: {
                updateSearchIndexInBackground();
                break;
            }

            case BACKGROUND_TASK_UPDATE_PROVIDER_STATUS: {
                updateProviderStatus();
                break;
            }

            case BACKGROUND_TASK_UPDATE_DIRECTORIES: {
                if (arg != null) {
                    mContactDirectoryManager.onPackageChanged((String) arg);
                }
                break;
            }

            case BACKGROUND_TASK_CLEANUP_PHOTOS: {
                // Check rate limit.
                long now = System.currentTimeMillis();
                if (now - mLastPhotoCleanup > PHOTO_CLEANUP_RATE_LIMIT) {
                    mLastPhotoCleanup = now;

                    // Clean up photo stores for both contacts and profiles.
                    switchToContactMode();
                    cleanupPhotoStore();
                    switchToProfileMode();
                    cleanupPhotoStore();
                    break;
                }
            }
        }
    }

    public void onLocaleChanged() {
        if (mProviderStatus != ProviderStatus.STATUS_NORMAL
                && mProviderStatus != ProviderStatus.STATUS_NO_ACCOUNTS_NO_CONTACTS) {
            return;
        }

        scheduleBackgroundTask(BACKGROUND_TASK_CHANGE_LOCALE);
    }

    /**
     * Verifies that the contacts database is properly configured for the current locale.
     * If not, changes the database locale to the current locale using an asynchronous task.
     * This needs to be done asynchronously because the process involves rebuilding
     * large data structures (name lookup, sort keys), which can take minutes on
     * a large set of contacts.
     */
    protected void updateLocaleInBackground() {

        // The process is already running - postpone the change
        if (mProviderStatus == ProviderStatus.STATUS_CHANGING_LOCALE) {
            return;
        }

        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getContext());
        final String providerLocale = prefs.getString(PREF_LOCALE, null);
        final Locale currentLocale = mCurrentLocale;
        if (currentLocale.toString().equals(providerLocale)) {
            return;
        }

        int providerStatus = mProviderStatus;
        setProviderStatus(ProviderStatus.STATUS_CHANGING_LOCALE);
        mContactsHelper.setLocale(this, currentLocale);
        mProfileHelper.setLocale(this, currentLocale);
        prefs.edit().putString(PREF_LOCALE, currentLocale.toString()).apply();
        invalidateFastScrollingIndexCache();
        setProviderStatus(providerStatus);
    }

    /**
     * Reinitializes the provider for a new locale.
     */
    private void changeLocaleInBackground() {
        // Re-initializing the provider without stopping it.
        // Locking the database will prevent inserts/updates/deletes from
        // running at the same time, but queries may still be running
        // on other threads. Those queries may return inconsistent results.
        SQLiteDatabase db = mContactsHelper.getWritableDatabase();
        SQLiteDatabase profileDb = mProfileHelper.getWritableDatabase();
        db.beginTransaction();
        profileDb.beginTransaction();
        try {
            initForDefaultLocale();
            db.setTransactionSuccessful();
            profileDb.setTransactionSuccessful();
        } finally {
            db.endTransaction();
            profileDb.endTransaction();
        }

        updateLocaleInBackground();
    }

    protected void updateSearchIndexInBackground() {
        mSearchIndexManager.updateIndex();
    }

    protected void updateDirectoriesInBackground(boolean rescan) {
        mContactDirectoryManager.scanAllPackages(rescan);
    }

    private void updateProviderStatus() {
        if (mProviderStatus != ProviderStatus.STATUS_NORMAL
                && mProviderStatus != ProviderStatus.STATUS_NO_ACCOUNTS_NO_CONTACTS) {
            return;
        }

        // No accounts/no contacts status is true if there are no account and
        // there are no contacts or one profile contact
        if (mContactsAccountCount == 0) {
            long contactsNum = DatabaseUtils.queryNumEntries(mContactsHelper.getReadableDatabase(),
                    Tables.CONTACTS, null);
            long profileNum = DatabaseUtils.queryNumEntries(mProfileHelper.getReadableDatabase(),
                    Tables.CONTACTS, null);

            // TODO: Different status if there is a profile but no contacts?
            if (contactsNum == 0 && profileNum <= 1) {
                setProviderStatus(ProviderStatus.STATUS_NO_ACCOUNTS_NO_CONTACTS);
            } else {
                setProviderStatus(ProviderStatus.STATUS_NORMAL);
            }
        } else {
            setProviderStatus(ProviderStatus.STATUS_NORMAL);
        }
    }

    @VisibleForTesting
    protected void cleanupPhotoStore() {
        SQLiteDatabase db = mDbHelper.get().getWritableDatabase();
        mActiveDb.set(db);

        // Assemble the set of photo store file IDs that are in use, and send those to the photo
        // store.  Any photos that aren't in that set will be deleted, and any photos that no
        // longer exist in the photo store will be returned for us to clear out in the DB.
        long photoMimeTypeId = mDbHelper.get().getMimeTypeId(Photo.CONTENT_ITEM_TYPE);
        Cursor c = db.query(Views.DATA, new String[]{Data._ID, Photo.PHOTO_FILE_ID},
                DataColumns.MIMETYPE_ID + "=" + photoMimeTypeId + " AND "
                        + Photo.PHOTO_FILE_ID + " IS NOT NULL", null, null, null, null);
        Set<Long> usedPhotoFileIds = Sets.newHashSet();
        Map<Long, Long> photoFileIdToDataId = Maps.newHashMap();
        try {
            while (c.moveToNext()) {
                long dataId = c.getLong(0);
                long photoFileId = c.getLong(1);
                usedPhotoFileIds.add(photoFileId);
                photoFileIdToDataId.put(photoFileId, dataId);
            }
        } finally {
            c.close();
        }

        // Also query for all social stream item photos.
        c = db.query(Tables.STREAM_ITEM_PHOTOS + " JOIN " + Tables.STREAM_ITEMS
                + " ON " + StreamItemPhotos.STREAM_ITEM_ID + "=" + StreamItemsColumns.CONCRETE_ID,
                new String[]{
                        StreamItemPhotosColumns.CONCRETE_ID,
                        StreamItemPhotosColumns.CONCRETE_STREAM_ITEM_ID,
                        StreamItemPhotos.PHOTO_FILE_ID
                },
                null, null, null, null, null);
        Map<Long, Long> photoFileIdToStreamItemPhotoId = Maps.newHashMap();
        Map<Long, Long> streamItemPhotoIdToStreamItemId = Maps.newHashMap();
        try {
            while (c.moveToNext()) {
                long streamItemPhotoId = c.getLong(0);
                long streamItemId = c.getLong(1);
                long photoFileId = c.getLong(2);
                usedPhotoFileIds.add(photoFileId);
                photoFileIdToStreamItemPhotoId.put(photoFileId, streamItemPhotoId);
                streamItemPhotoIdToStreamItemId.put(streamItemPhotoId, streamItemId);
            }
        } finally {
            c.close();
        }

        // Run the photo store cleanup.
        Set<Long> missingPhotoIds = mPhotoStore.get().cleanup(usedPhotoFileIds);

        // If any of the keys we're using no longer exist, clean them up.  We need to do these
        // using internal APIs or direct DB access to avoid permission errors.
        if (!missingPhotoIds.isEmpty()) {
            try {
                db.beginTransactionWithListener(this);
                for (long missingPhotoId : missingPhotoIds) {
                    if (photoFileIdToDataId.containsKey(missingPhotoId)) {
                        long dataId = photoFileIdToDataId.get(missingPhotoId);
                        ContentValues updateValues = new ContentValues();
                        updateValues.putNull(Photo.PHOTO_FILE_ID);
                        updateData(ContentUris.withAppendedId(Data.CONTENT_URI, dataId),
                                updateValues, null, null, false);
                    }
                    if (photoFileIdToStreamItemPhotoId.containsKey(missingPhotoId)) {
                        // For missing photos that were in stream item photos, just delete the
                        // stream item photo.
                        long streamItemPhotoId = photoFileIdToStreamItemPhotoId.get(missingPhotoId);
                        db.delete(Tables.STREAM_ITEM_PHOTOS, StreamItemPhotos._ID + "=?",
                                new String[]{String.valueOf(streamItemPhotoId)});
                    }
                }
                db.setTransactionSuccessful();
            } catch (Exception e) {
                // Cleanup failure is not a fatal problem.  We'll try again later.
                Log.e(TAG, "Failed to clean up outdated photo references", e);
            } finally {
                db.endTransaction();
            }
        }
    }

    @Override
    protected ContactsDatabaseHelper getDatabaseHelper(final Context context) {
        return ContactsDatabaseHelper.getInstance(context);
    }

    @Override
    protected ThreadLocal<ContactsTransaction> getTransactionHolder() {
        return mTransactionHolder;
    }

    public ProfileProvider getProfileProvider() {
        return new ProfileProvider(this);
    }

    @VisibleForTesting
    /* package */ PhotoStore getPhotoStore() {
        return mContactsPhotoStore;
    }

    @VisibleForTesting
    /* package */ PhotoStore getProfilePhotoStore() {
        return mProfilePhotoStore;
    }

    /**
     * Maximum dimension (height or width) of photo thumbnails.
     */
    public int getMaxThumbnailDim() {
        return PhotoProcessor.getMaxThumbnailSize();
    }

    /**
     * Maximum dimension (height or width) of display photos.  Larger images will be scaled
     * to fit.
     */
    public int getMaxDisplayPhotoDim() {
        return PhotoProcessor.getMaxDisplayPhotoSize();
    }

    /* package */ NameSplitter getNameSplitter() {
        return mNameSplitter;
    }

    /* package */ NameLookupBuilder getNameLookupBuilder() {
        return mNameLookupBuilder;
    }

    @VisibleForTesting
    public ContactDirectoryManager getContactDirectoryManagerForTest() {
        return mContactDirectoryManager;
    }

    @VisibleForTesting
    protected Locale getLocale() {
        return Locale.getDefault();
    }

    private boolean inProfileMode() {
        Boolean profileMode = mInProfileMode.get();
        return profileMode != null && profileMode;
    }

    /**
     * Wipes all data from the contacts database.
     */
    @NeededForTesting
    void wipeData() {
        invalidateFastScrollingIndexCache();
        mContactsHelper.wipeData();
        mProfileHelper.wipeData();
        mContactsPhotoStore.clear();
        mProfilePhotoStore.clear();
        mProviderStatus = ProviderStatus.STATUS_NO_ACCOUNTS_NO_CONTACTS;
    }

    /**
     * During intialization, this content provider will
     * block all attempts to change contacts data. In particular, it will hold
     * up all contact syncs. As soon as the import process is complete, all
     * processes waiting to write to the provider are unblocked and can proceed
     * to compete for the database transaction monitor.
     */
    private void waitForAccess(CountDownLatch latch) {
        if (latch == null) {
            return;
        }

        while (true) {
            try {
                latch.await();
                return;
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        }
    }

    /**
     * Determines whether the given URI should be directed to the profile
     * database rather than the contacts database.  This is true under either
     * of three conditions:
     * 1. The URI itself is specifically for the profile.
     * 2. The URI contains ID references that are in the profile ID-space.
     * 3. The URI contains lookup key references that match the special profile lookup key.
     * @param uri The URI to examine.
     * @return Whether to direct the DB operation to the profile database.
     */
    private boolean mapsToProfileDb(Uri uri) {
        return sUriMatcher.mapsToProfile(uri);
    }

    /**
     * Determines whether the given URI with the given values being inserted
     * should be directed to the profile database rather than the contacts
     * database.  This is true if the URI already maps to the profile DB from
     * a call to {@link #mapsToProfileDb} or if the URI matches a URI that
     * specifies parent IDs via the ContentValues, and the given ContentValues
     * contains an ID in the profile ID-space.
     * @param uri The URI to examine.
     * @param values The values being inserted.
     * @return Whether to direct the DB insert to the profile database.
     */
    private boolean mapsToProfileDbWithInsertedValues(Uri uri, ContentValues values) {
        if (mapsToProfileDb(uri)) {
            return true;
        }
        int match = sUriMatcher.match(uri);
        if (INSERT_URI_ID_VALUE_MAP.containsKey(match)) {
            String idField = INSERT_URI_ID_VALUE_MAP.get(match);
            if (values.containsKey(idField)) {
                long id = values.getAsLong(idField);
                if (ContactsContract.isProfileId(id)) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * Switches the provider's thread-local context variables to prepare for performing
     * a profile operation.
     */
    protected void switchToProfileMode() {
        mDbHelper.set(mProfileHelper);
        mTransactionContext.set(mProfileTransactionContext);
        mAggregator.set(mProfileAggregator);
        mPhotoStore.set(mProfilePhotoStore);
        mInProfileMode.set(true);
    }

    /**
     * Switches the provider's thread-local context variables to prepare for performing
     * a contacts operation.
     */
    protected void switchToContactMode() {
        mDbHelper.set(mContactsHelper);
        mTransactionContext.set(mContactTransactionContext);
        mAggregator.set(mContactAggregator);
        mPhotoStore.set(mContactsPhotoStore);
        mInProfileMode.set(false);

        // Clear out the active database; modification operations will set this to the contacts DB.
        mActiveDb.set(null);
    }

    @Override
    public Uri insert(Uri uri, ContentValues values) {
        waitForAccess(mWriteAccessLatch);

        // Enforce stream items access check if applicable.
        enforceSocialStreamWritePermission(uri);

        if (mapsToProfileDbWithInsertedValues(uri, values)) {
            switchToProfileMode();
            return mProfileProvider.insert(uri, values);
        } else {
            switchToContactMode();
            return super.insert(uri, values);
        }
    }

    @Override
    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
        if (mWriteAccessLatch != null) {
            // Update on PROVIDER_STATUS used to be used as a trigger to re-start legacy contact
            // import.  Now that we no longer support it, we just ignore it.
            int match = sUriMatcher.match(uri);
            if (match == PROVIDER_STATUS) {
                return 0;
            }
        }
        waitForAccess(mWriteAccessLatch);

        // Enforce stream items access check if applicable.
        enforceSocialStreamWritePermission(uri);

        if (mapsToProfileDb(uri)) {
            switchToProfileMode();
            return mProfileProvider.update(uri, values, selection, selectionArgs);
        } else {
            switchToContactMode();
            return super.update(uri, values, selection, selectionArgs);
        }
    }

    @Override
    public int delete(Uri uri, String selection, String[] selectionArgs) {
        waitForAccess(mWriteAccessLatch);

        // Enforce stream items access check if applicable.
        enforceSocialStreamWritePermission(uri);

        if (mapsToProfileDb(uri)) {
            switchToProfileMode();
            return mProfileProvider.delete(uri, selection, selectionArgs);
        } else {
            switchToContactMode();
            return super.delete(uri, selection, selectionArgs);
        }
    }

    /**
     * Replaces the current (thread-local) database to use for the operation with the given one.
     * @param db The database to use.
     */
    /* package */ void substituteDb(SQLiteDatabase db) {
        mActiveDb.set(db);
    }

    @Override
    public Bundle call(String method, String arg, Bundle extras) {
        waitForAccess(mReadAccessLatch);
        if (method.equals(Authorization.AUTHORIZATION_METHOD)) {
            Uri uri = (Uri) extras.getParcelable(Authorization.KEY_URI_TO_AUTHORIZE);

            // Check permissions on the caller.  The URI can only be pre-authorized if the caller
            // already has the necessary permissions.
            enforceSocialStreamReadPermission(uri);
            if (mapsToProfileDb(uri)) {
                mProfileProvider.enforceReadPermission(uri);
            }

            // If there hasn't been a security violation yet, we're clear to pre-authorize the URI.
            Uri authUri = preAuthorizeUri(uri);
            Bundle response = new Bundle();
            response.putParcelable(Authorization.KEY_AUTHORIZED_URI, authUri);
            return response;
        }
        return null;
    }

    /**
     * Pre-authorizes the given URI, adding an expiring permission token to it and placing that
     * in our map of pre-authorized URIs.
     * @param uri The URI to pre-authorize.
     * @return A pre-authorized URI that will not require special permissions to use.
     */
    private Uri preAuthorizeUri(Uri uri) {
        String token = String.valueOf(mRandom.nextLong());
        Uri authUri = uri.buildUpon()
                .appendQueryParameter(PREAUTHORIZED_URI_TOKEN, token)
                .build();
        long expiration = SystemClock.elapsedRealtime() + mPreAuthorizedUriDuration;
        mPreAuthorizedUris.put(authUri, expiration);

        return authUri;
    }

    /**
     * Checks whether the given URI has an unexpired permission token that would grant access to
     * query the content.  If it does, the regular permission check should be skipped.
     * @param uri The URI being accessed.
     * @return Whether the URI is a pre-authorized URI that is still valid.
     */
    public boolean isValidPreAuthorizedUri(Uri uri) {
        // Only proceed if the URI has a permission token parameter.
        if (uri.getQueryParameter(PREAUTHORIZED_URI_TOKEN) != null) {
            // First expire any pre-authorization URIs that are no longer valid.
            long now = SystemClock.elapsedRealtime();
            Set<Uri> expiredUris = Sets.newHashSet();
            for (Uri preAuthUri : mPreAuthorizedUris.keySet()) {
                if (mPreAuthorizedUris.get(preAuthUri) < now) {
                    expiredUris.add(preAuthUri);
                }
            }
            for (Uri expiredUri : expiredUris) {
                mPreAuthorizedUris.remove(expiredUri);
            }

            // Now check to see if the pre-authorized URI map contains the URI.
            if (mPreAuthorizedUris.containsKey(uri)) {
                // Unexpired token - skip the permission check.
                return true;
            }
        }
        return false;
    }

    @Override
    protected boolean yield(ContactsTransaction transaction) {
        // If there's a profile transaction in progress, and we're yielding, we need to
        // end it.  Unlike the Contacts DB yield (which re-starts a transaction at its
        // conclusion), we can just go back into a state in which we have no active
        // profile transaction, and let it be re-created as needed.  We can't hold onto
        // the transaction without risking a deadlock.
        SQLiteDatabase profileDb = transaction.removeDbForTag(PROFILE_DB_TAG);
        if (profileDb != null) {
            profileDb.setTransactionSuccessful();
            profileDb.endTransaction();
        }

        // Now proceed with the Contacts DB yield.
        SQLiteDatabase contactsDb = transaction.getDbForTag(CONTACTS_DB_TAG);
        return contactsDb != null && contactsDb.yieldIfContendedSafely(SLEEP_AFTER_YIELD_DELAY);
    }

    @Override
    public ContentProviderResult[] applyBatch(ArrayList<ContentProviderOperation> operations)
            throws OperationApplicationException {
        waitForAccess(mWriteAccessLatch);
        return super.applyBatch(operations);
    }

    @Override
    public int bulkInsert(Uri uri, ContentValues[] values) {
        waitForAccess(mWriteAccessLatch);
        return super.bulkInsert(uri, values);
    }

    @Override
    public void onBegin() {
        if (VERBOSE_LOGGING) {
            Log.v(TAG, "onBeginTransaction: " + (inProfileMode() ? "profile" : "contacts"));
        }
        if (inProfileMode()) {
            mProfileAggregator.clearPendingAggregations();
            mProfileTransactionContext.clear();
        } else {
            mContactAggregator.clearPendingAggregations();
            mContactTransactionContext.clear();
        }
    }

    @Override
    public void onCommit() {
        if (VERBOSE_LOGGING) {
            Log.v(TAG, "beforeTransactionCommit: " + (inProfileMode() ? "profile" : "contacts"));
        }
        flushTransactionalChanges();
        mAggregator.get().aggregateInTransaction(mTransactionContext.get(), mActiveDb.get());
        if (mVisibleTouched) {
            mVisibleTouched = false;
            mDbHelper.get().updateAllVisible();

            // Need to rebuild the fast-indxer bundle.
            invalidateFastScrollingIndexCache();
        }

        updateSearchIndexInTransaction();

        if (mProviderStatusUpdateNeeded) {
            updateProviderStatus();
            mProviderStatusUpdateNeeded = false;
        }
    }

    @Override
    public void onRollback() {
        if (VERBOSE_LOGGING) {
            Log.v(TAG, "beforeTransactionRollback: " + (inProfileMode() ? "profile" : "contacts"));
        }
        // mDbHelper may not be pointing at the "right" db helper due to a bug,
        // so we invalidate both for now.
        mContactsHelper.invalidateAllCache();
        mProfileHelper.invalidateAllCache();
    }

    private void updateSearchIndexInTransaction() {
        Set<Long> staleContacts = mTransactionContext.get().getStaleSearchIndexContactIds();
        Set<Long> staleRawContacts = mTransactionContext.get().getStaleSearchIndexRawContactIds();
        if (!staleContacts.isEmpty() || !staleRawContacts.isEmpty()) {
            mSearchIndexManager.updateIndexForRawContacts(staleContacts, staleRawContacts);
            mTransactionContext.get().clearSearchIndexUpdates();
        }
    }

    private void flushTransactionalChanges() {
        if (VERBOSE_LOGGING) {
            Log.v(TAG, "flushTransactionChanges");
        }

        for (long rawContactId : mTransactionContext.get().getInsertedRawContactIds()) {
            mDbHelper.get().updateRawContactDisplayName(mActiveDb.get(), rawContactId);
            mAggregator.get().onRawContactInsert(mTransactionContext.get(), mActiveDb.get(),
                    rawContactId);
        }

        Set<Long> dirtyRawContacts = mTransactionContext.get().getDirtyRawContactIds();
        if (!dirtyRawContacts.isEmpty()) {
            mSb.setLength(0);
            mSb.append(UPDATE_RAW_CONTACT_SET_DIRTY_SQL);
            appendIds(mSb, dirtyRawContacts);
            mSb.append(")");
            mActiveDb.get().execSQL(mSb.toString());
        }

        Set<Long> updatedRawContacts = mTransactionContext.get().getUpdatedRawContactIds();
        if (!updatedRawContacts.isEmpty()) {
            mSb.setLength(0);
            mSb.append(UPDATE_RAW_CONTACT_SET_VERSION_SQL);
            appendIds(mSb, updatedRawContacts);
            mSb.append(")");
            mActiveDb.get().execSQL(mSb.toString());
        }

        // Update sync states.
        for (Map.Entry<Long, Object> entry : mTransactionContext.get().getUpdatedSyncStates()) {
            long id = entry.getKey();
            if (mDbHelper.get().getSyncState().update(mActiveDb.get(), id, entry.getValue()) <= 0) {
                throw new IllegalStateException(
                        "unable to update sync state, does it still exist?");
            }
        }

        mTransactionContext.get().clear();
    }

    /**
     * Appends comma separated ids.
     * @param ids Should not be empty
     */
    private void appendIds(StringBuilder sb, Set<Long> ids) {
        for (long id : ids) {
            sb.append(id).append(',');
        }

        sb.setLength(sb.length() - 1); // Yank the last comma
    }

    @Override
    protected void notifyChange() {
        notifyChange(mSyncToNetwork);
        mSyncToNetwork = false;
    }

    protected void notifyChange(boolean syncToNetwork) {
        getContext().getContentResolver().notifyChange(ContactsContract.AUTHORITY_URI, null,
                syncToNetwork);
    }

    protected void setProviderStatus(int status) {
        if (mProviderStatus != status) {
            mProviderStatus = status;
            getContext().getContentResolver().notifyChange(ProviderStatus.CONTENT_URI, null, false);
        }
    }

    public DataRowHandler getDataRowHandler(final String mimeType) {
        if (inProfileMode()) {
            return getDataRowHandlerForProfile(mimeType);
        }
        DataRowHandler handler = mDataRowHandlers.get(mimeType);
        if (handler == null) {
            handler = new DataRowHandlerForCustomMimetype(
                    getContext(), mContactsHelper, mContactAggregator, mimeType);
            mDataRowHandlers.put(mimeType, handler);
        }
        return handler;
    }

    public DataRowHandler getDataRowHandlerForProfile(final String mimeType) {
        DataRowHandler handler = mProfileDataRowHandlers.get(mimeType);
        if (handler == null) {
            handler = new DataRowHandlerForCustomMimetype(
                    getContext(), mProfileHelper, mProfileAggregator, mimeType);
            mProfileDataRowHandlers.put(mimeType, handler);
        }
        return handler;
    }

    @Override
    protected Uri insertInTransaction(Uri uri, ContentValues values) {
        if (VERBOSE_LOGGING) {
            Log.v(TAG, "insertInTransaction: " + uri + " " + values);
        }

        // Default active DB to the contacts DB if none has been set.
        if (mActiveDb.get() == null) {
            mActiveDb.set(mContactsHelper.getWritableDatabase());
        }

        final boolean callerIsSyncAdapter =
                readBooleanQueryParameter(uri, ContactsContract.CALLER_IS_SYNCADAPTER, false);

        final int match = sUriMatcher.match(uri);
        long id = 0;

        switch (match) {
            case SYNCSTATE:
            case PROFILE_SYNCSTATE:
                id = mDbHelper.get().getSyncState().insert(mActiveDb.get(), values);
                break;

            case CONTACTS: {
                invalidateFastScrollingIndexCache();
                insertContact(values);
                break;
            }

            case PROFILE: {
                throw new UnsupportedOperationException(
                        "The profile contact is created automatically");
            }

            case RAW_CONTACTS:
            case PROFILE_RAW_CONTACTS: {
                invalidateFastScrollingIndexCache();
                id = insertRawContact(uri, values, callerIsSyncAdapter);
                mSyncToNetwork |= !callerIsSyncAdapter;
                break;
            }

            case RAW_CONTACTS_ID_DATA:
            case PROFILE_RAW_CONTACTS_ID_DATA: {
                invalidateFastScrollingIndexCache();
                int segment = match == RAW_CONTACTS_ID_DATA ? 1 : 2;
                values.put(Data.RAW_CONTACT_ID, uri.getPathSegments().get(segment));
                id = insertData(values, callerIsSyncAdapter);
                mSyncToNetwork |= !callerIsSyncAdapter;
                break;
            }

            case RAW_CONTACTS_ID_STREAM_ITEMS: {
                values.put(StreamItems.RAW_CONTACT_ID, uri.getPathSegments().get(1));
                id = insertStreamItem(uri, values);
                mSyncToNetwork |= !callerIsSyncAdapter;
                break;
            }

            case DATA:
            case PROFILE_DATA: {
                invalidateFastScrollingIndexCache();
                id = insertData(values, callerIsSyncAdapter);
                mSyncToNetwork |= !callerIsSyncAdapter;
                break;
            }

            case GROUPS: {
                id = insertGroup(uri, values, callerIsSyncAdapter);
                mSyncToNetwork |= !callerIsSyncAdapter;
                break;
            }

            case SETTINGS: {
                id = insertSettings(uri, values);
                mSyncToNetwork |= !callerIsSyncAdapter;
                break;
            }

            case STATUS_UPDATES:
            case PROFILE_STATUS_UPDATES: {
                id = insertStatusUpdate(values);
                break;
            }

            case STREAM_ITEMS: {
                id = insertStreamItem(uri, values);
                mSyncToNetwork |= !callerIsSyncAdapter;
                break;
            }

            case STREAM_ITEMS_PHOTOS: {
                id = insertStreamItemPhoto(uri, values);
                mSyncToNetwork |= !callerIsSyncAdapter;
                break;
            }

            case STREAM_ITEMS_ID_PHOTOS: {
                values.put(StreamItemPhotos.STREAM_ITEM_ID, uri.getPathSegments().get(1));
                id = insertStreamItemPhoto(uri, values);
                mSyncToNetwork |= !callerIsSyncAdapter;
                break;
            }

            default:
                mSyncToNetwork = true;
                return mLegacyApiSupport.insert(uri, values);
        }

        if (id < 0) {
            return null;
        }

        return ContentUris.withAppendedId(uri, id);
    }

    /**
     * If account is non-null then store it in the values. If the account is
     * already specified in the values then it must be consistent with the
     * account, if it is non-null.
     *
     * @param uri Current {@link Uri} being operated on.
     * @param values {@link ContentValues} to read and possibly update.
     * @throws IllegalArgumentException when only one of
     *             {@link RawContacts#ACCOUNT_NAME} or
     *             {@link RawContacts#ACCOUNT_TYPE} is specified, leaving the
     *             other undefined.
     * @throws IllegalArgumentException when {@link RawContacts#ACCOUNT_NAME}
     *             and {@link RawContacts#ACCOUNT_TYPE} are inconsistent between
     *             the given {@link Uri} and {@link ContentValues}.
     */
    private Account resolveAccount(Uri uri, ContentValues values) throws IllegalArgumentException {
        String accountName = getQueryParameter(uri, RawContacts.ACCOUNT_NAME);
        String accountType = getQueryParameter(uri, RawContacts.ACCOUNT_TYPE);
        final boolean partialUri = TextUtils.isEmpty(accountName) ^ TextUtils.isEmpty(accountType);

        String valueAccountName = values.getAsString(RawContacts.ACCOUNT_NAME);
        String valueAccountType = values.getAsString(RawContacts.ACCOUNT_TYPE);
        final boolean partialValues = TextUtils.isEmpty(valueAccountName)
                ^ TextUtils.isEmpty(valueAccountType);

        if (partialUri || partialValues) {
            // Throw when either account is incomplete
            throw new IllegalArgumentException(mDbHelper.get().exceptionMessage(
                    "Must specify both or neither of ACCOUNT_NAME and ACCOUNT_TYPE", uri));
        }

        // Accounts are valid by only checking one parameter, since we've
        // already ruled out partial accounts.
        final boolean validUri = !TextUtils.isEmpty(accountName);
        final boolean validValues = !TextUtils.isEmpty(valueAccountName);

        if (validValues && validUri) {
            // Check that accounts match when both present
            final boolean accountMatch = TextUtils.equals(accountName, valueAccountName)
                    && TextUtils.equals(accountType, valueAccountType);
            if (!accountMatch) {
                throw new IllegalArgumentException(mDbHelper.get().exceptionMessage(
                        "When both specified, ACCOUNT_NAME and ACCOUNT_TYPE must match", uri));
            }
        } else if (validUri) {
            // Fill values from Uri when not present
            values.put(RawContacts.ACCOUNT_NAME, accountName);
            values.put(RawContacts.ACCOUNT_TYPE, accountType);
        } else if (validValues) {
            accountName = valueAccountName;
            accountType = valueAccountType;
        } else {
            return null;
        }

        // Use cached Account object when matches, otherwise create
        if (mAccount == null
                || !mAccount.name.equals(accountName)
                || !mAccount.type.equals(accountType)) {
            mAccount = new Account(accountName, accountType);
        }

        return mAccount;
    }

    /**
     * Resolves the account and builds an {@link AccountWithDataSet} based on the data set specified
     * in the URI or values (if any).
     * @param uri Current {@link Uri} being operated on.
     * @param values {@link ContentValues} to read and possibly update.
     */
    private AccountWithDataSet resolveAccountWithDataSet(Uri uri, ContentValues values) {
        final Account account = resolveAccount(uri, values);
        AccountWithDataSet accountWithDataSet = null;
        if (account != null) {
            String dataSet = getQueryParameter(uri, RawContacts.DATA_SET);
            if (dataSet == null) {
                dataSet = values.getAsString(RawContacts.DATA_SET);
            } else {
                values.put(RawContacts.DATA_SET, dataSet);
            }
            accountWithDataSet = AccountWithDataSet.get(account.name, account.type, dataSet);
        }
        return accountWithDataSet;
    }

    /**
     * Same as {@link #resolveAccountWithDataSet}, but returns the account id for the
     *     {@link AccountWithDataSet}.  Used for insert.
     *
     * May update the account cache; must be used only in a transaction.
     */
    private long resolveAccountIdInTransaction(Uri uri, ContentValues values) {
        return mDbHelper.get().getOrCreateAccountIdInTransaction(
                resolveAccountWithDataSet(uri, mValues));
    }

    /**
     * Inserts an item in the contacts table
     *
     * @param values the values for the new row
     * @return the row ID of the newly created row
     */
    private long insertContact(ContentValues values) {
        throw new UnsupportedOperationException("Aggregate contacts are created automatically");
    }

    /**
     * Inserts an item in the raw contacts table
     *
     * @param uri the values for the new row
     * @param values the account this contact should be associated with. may be null.
     * @param callerIsSyncAdapter
     * @return the row ID of the newly created row
     */
    private long insertRawContact(Uri uri, ContentValues values, boolean callerIsSyncAdapter) {
        mValues.clear();
        mValues.putAll(values);
        mValues.putNull(RawContacts.CONTACT_ID);

        final long accountId = resolveAccountIdInTransaction(uri, mValues);
        mValues.remove(RawContacts.ACCOUNT_NAME);
        mValues.remove(RawContacts.ACCOUNT_TYPE);
        mValues.remove(RawContacts.DATA_SET);
        mValues.put(RawContactsColumns.ACCOUNT_ID, accountId);

        if (values.containsKey(RawContacts.DELETED)
                && values.getAsInteger(RawContacts.DELETED) != 0) {
            mValues.put(RawContacts.AGGREGATION_MODE, RawContacts.AGGREGATION_MODE_DISABLED);
        }

        long rawContactId = mActiveDb.get().insert(Tables.RAW_CONTACTS,
                RawContacts.CONTACT_ID, mValues);
        int aggregationMode = RawContacts.AGGREGATION_MODE_DEFAULT;
        if (mValues.containsKey(RawContacts.AGGREGATION_MODE)) {
            aggregationMode = mValues.getAsInteger(RawContacts.AGGREGATION_MODE);
        }
        mAggregator.get().markNewForAggregation(rawContactId, aggregationMode);

        // Trigger creation of a Contact based on this RawContact at the end of transaction
        mTransactionContext.get().rawContactInserted(rawContactId, accountId);

        if (!callerIsSyncAdapter) {
            addAutoAddMembership(rawContactId);
            final Long starred = values.getAsLong(RawContacts.STARRED);
            if (starred != null && starred != 0) {
                updateFavoritesMembership(rawContactId, starred != 0);
            }
        }

        mProviderStatusUpdateNeeded = true;
        return rawContactId;
    }

    private void addAutoAddMembership(long rawContactId) {
        final Long groupId = findGroupByRawContactId(SELECTION_AUTO_ADD_GROUPS_BY_RAW_CONTACT_ID,
                rawContactId);
        if (groupId != null) {
            insertDataGroupMembership(rawContactId, groupId);
        }
    }

    private Long findGroupByRawContactId(String selection, long rawContactId) {
        Cursor c = mActiveDb.get().query(Tables.GROUPS + "," + Tables.RAW_CONTACTS,
                PROJECTION_GROUP_ID, selection,
                new String[]{Long.toString(rawContactId)},
                null /* groupBy */, null /* having */, null /* orderBy */);
        try {
            while (c.moveToNext()) {
                return c.getLong(0);
            }
            return null;
        } finally {
            c.close();
        }
    }

    private void updateFavoritesMembership(long rawContactId, boolean isStarred) {
        final Long groupId = findGroupByRawContactId(SELECTION_FAVORITES_GROUPS_BY_RAW_CONTACT_ID,
                rawContactId);
        if (groupId != null) {
            if (isStarred) {
                insertDataGroupMembership(rawContactId, groupId);
            } else {
                deleteDataGroupMembership(rawContactId, groupId);
            }
        }
    }

    private void insertDataGroupMembership(long rawContactId, long groupId) {
        ContentValues groupMembershipValues = new ContentValues();
        groupMembershipValues.put(GroupMembership.GROUP_ROW_ID, groupId);
        groupMembershipValues.put(GroupMembership.RAW_CONTACT_ID, rawContactId);
        groupMembershipValues.put(DataColumns.MIMETYPE_ID,
                mDbHelper.get().getMimeTypeId(GroupMembership.CONTENT_ITEM_TYPE));
        mActiveDb.get().insert(Tables.DATA, null, groupMembershipValues);
    }

    private void deleteDataGroupMembership(long rawContactId, long groupId) {
        final String[] selectionArgs = {
                Long.toString(mDbHelper.get().getMimeTypeId(GroupMembership.CONTENT_ITEM_TYPE)),
                Long.toString(groupId),
                Long.toString(rawContactId)};
        mActiveDb.get().delete(Tables.DATA, SELECTION_GROUPMEMBERSHIP_DATA, selectionArgs);
    }

    /**
     * Inserts an item in the data table
     *
     * @param values the values for the new row
     * @return the row ID of the newly created row
     */
    private long insertData(ContentValues values, boolean callerIsSyncAdapter) {
        long id = 0;
        mValues.clear();
        mValues.putAll(values);

        long rawContactId = mValues.getAsLong(Data.RAW_CONTACT_ID);

        // Replace package with internal mapping
        final String packageName = mValues.getAsString(Data.RES_PACKAGE);
        if (packageName != null) {
            mValues.put(DataColumns.PACKAGE_ID, mDbHelper.get().getPackageId(packageName));
        }
        mValues.remove(Data.RES_PACKAGE);

        // Replace mimetype with internal mapping
        final String mimeType = mValues.getAsString(Data.MIMETYPE);
        if (TextUtils.isEmpty(mimeType)) {
            throw new IllegalArgumentException(Data.MIMETYPE + " is required");
        }

        mValues.put(DataColumns.MIMETYPE_ID, mDbHelper.get().getMimeTypeId(mimeType));
        mValues.remove(Data.MIMETYPE);

        DataRowHandler rowHandler = getDataRowHandler(mimeType);
        id = rowHandler.insert(mActiveDb.get(), mTransactionContext.get(), rawContactId, mValues);
        if (!callerIsSyncAdapter) {
            mTransactionContext.get().markRawContactDirty(rawContactId);
        }
        mTransactionContext.get().rawContactUpdated(rawContactId);
        return id;
    }

    /**
     * Inserts an item in the stream_items table.  The account is checked against the
     * account in the raw contact for which the stream item is being inserted.  If the
     * new stream item results in more stream items under this raw contact than the limit,
     * the oldest one will be deleted (note that if the stream item inserted was the
     * oldest, it will be immediately deleted, and this will return 0).
     *
     * @param uri the insertion URI
     * @param values the values for the new row
     * @return the stream item _ID of the newly created row, or 0 if it was not created
     */
    private long insertStreamItem(Uri uri, ContentValues values) {
        long id = 0;
        mValues.clear();
        mValues.putAll(values);

        long rawContactId = mValues.getAsLong(StreamItems.RAW_CONTACT_ID);

        // Don't attempt to insert accounts params - they don't exist in the stream items table.
        mValues.remove(RawContacts.ACCOUNT_NAME);
        mValues.remove(RawContacts.ACCOUNT_TYPE);

        // Insert the new stream item.
        id = mActiveDb.get().insert(Tables.STREAM_ITEMS, null, mValues);
        if (id == -1) {
            // Insertion failed.
            return 0;
        }

        // Check to see if we're over the limit for stream items under this raw contact.
        // It's possible that the inserted stream item is older than the the existing
        // ones, in which case it may be deleted immediately (resetting the ID to 0).
        id = cleanUpOldStreamItems(rawContactId, id);

        return id;
    }

    /**
     * Inserts an item in the stream_item_photos table.  The account is checked against
     * the account in the raw contact that owns the stream item being modified.
     *
     * @param uri the insertion URI
     * @param values the values for the new row
     * @return the stream item photo _ID of the newly created row, or 0 if there was an issue
     *     with processing the photo or creating the row
     */
    private long insertStreamItemPhoto(Uri uri, ContentValues values) {
        long id = 0;
        mValues.clear();
        mValues.putAll(values);

        long streamItemId = mValues.getAsLong(StreamItemPhotos.STREAM_ITEM_ID);
        if (streamItemId != 0) {
            long rawContactId = lookupRawContactIdForStreamId(streamItemId);

            // Don't attempt to insert accounts params - they don't exist in the stream item
            // photos table.
            mValues.remove(RawContacts.ACCOUNT_NAME);
            mValues.remove(RawContacts.ACCOUNT_TYPE);

            // Process the photo and store it.
            if (processStreamItemPhoto(mValues, false)) {
                // Insert the stream item photo.
                id = mActiveDb.get().insert(Tables.STREAM_ITEM_PHOTOS, null, mValues);
            }
        }
        return id;
    }

    /**
     * Processes the photo contained in the {@link ContactsContract.StreamItemPhotos#PHOTO}
     * field of the given values, attempting to store it in the photo store.  If successful,
     * the resulting photo file ID will be added to the values for insert/update in the table.
     * <p>
     * If updating, it is valid for the picture to be empty or unspecified (the function will
     * still return true).  If inserting, a valid picture must be specified.
     * @param values The content values provided by the caller.
     * @param forUpdate Whether this photo is being processed for update (vs. insert).
     * @return Whether the insert or update should proceed.
     */
    private boolean processStreamItemPhoto(ContentValues values, boolean forUpdate) {
        if (!values.containsKey(StreamItemPhotos.PHOTO)) {
            return forUpdate;
        }
        byte[] photoBytes = values.getAsByteArray(StreamItemPhotos.PHOTO);
        if (photoBytes == null) {
            return forUpdate;
        }

        // Process the photo and store it.
        try {
            long photoFileId = mPhotoStore.get().insert(new PhotoProcessor(photoBytes,
                    getMaxDisplayPhotoDim(), getMaxThumbnailDim(), true), true);
            if (photoFileId != 0) {
                values.put(StreamItemPhotos.PHOTO_FILE_ID, photoFileId);
                values.remove(StreamItemPhotos.PHOTO);
                return true;
            } else {
                // Couldn't store the photo, return 0.
                Log.e(TAG, "Could not process stream item photo for insert");
                return false;
            }
        } catch (IOException ioe) {
            Log.e(TAG, "Could not process stream item photo for insert", ioe);
            return false;
        }
    }

    /**
     * Looks up the raw contact ID that owns the specified stream item.
     * @param streamItemId The ID of the stream item.
     * @return The associated raw contact ID, or -1 if no such stream item exists.
     */
    private long lookupRawContactIdForStreamId(long streamItemId) {
        long rawContactId = -1;
        Cursor c = mActiveDb.get().query(Tables.STREAM_ITEMS,
                new String[]{StreamItems.RAW_CONTACT_ID},
                StreamItems._ID + "=?", new String[]{String.valueOf(streamItemId)},
                null, null, null);
        try {
            if (c.moveToFirst()) {
                rawContactId = c.getLong(0);
            }
        } finally {
            c.close();
        }
        return rawContactId;
    }

    /**
     * If the given URI is reading stream items or stream photos, this will run a permission check
     * for the android.permission.READ_SOCIAL_STREAM permission - otherwise it will do nothing.
     * @param uri The URI to check.
     */
    private void enforceSocialStreamReadPermission(Uri uri) {
        if (SOCIAL_STREAM_URIS.contains(sUriMatcher.match(uri))
                && !isValidPreAuthorizedUri(uri)) {
            getContext().enforceCallingOrSelfPermission(
                    "android.permission.READ_SOCIAL_STREAM", null);
        }
    }

    /**
     * If the given URI is modifying stream items or stream photos, this will run a permission check
     * for the android.permission.WRITE_SOCIAL_STREAM permission - otherwise it will do nothing.
     * @param uri The URI to check.
     */
    private void enforceSocialStreamWritePermission(Uri uri) {
        if (SOCIAL_STREAM_URIS.contains(sUriMatcher.match(uri))) {
            getContext().enforceCallingOrSelfPermission(
                    "android.permission.WRITE_SOCIAL_STREAM", null);
        }
    }

    /**
     * Queries the database for stream items under the given raw contact.  If there are
     * more entries than {@link ContactsProvider2#MAX_STREAM_ITEMS_PER_RAW_CONTACT},
     * the oldest entries (as determined by timestamp) will be deleted.
     * @param rawContactId The raw contact ID to examine for stream items.
     * @param insertedStreamItemId The ID of the stream item that was just inserted,
     *     prompting this cleanup.  Callers may pass 0 if no insertion prompted the
     *     cleanup.
     * @return The ID of the inserted stream item if it still exists after cleanup;
     *     0 otherwise.
     */
    private long cleanUpOldStreamItems(long rawContactId, long insertedStreamItemId) {
        long postCleanupInsertedStreamId = insertedStreamItemId;
        Cursor c = mActiveDb.get().query(Tables.STREAM_ITEMS, new String[]{StreamItems._ID},
                StreamItems.RAW_CONTACT_ID + "=?", new String[]{String.valueOf(rawContactId)},
                null, null, StreamItems.TIMESTAMP + " DESC, " + StreamItems._ID + " DESC");
        try {
            int streamItemCount = c.getCount();
            if (streamItemCount <= MAX_STREAM_ITEMS_PER_RAW_CONTACT) {
                // Still under the limit - nothing to clean up!
                return insertedStreamItemId;
            } else {
                c.moveToLast();
                while (c.getPosition() >= MAX_STREAM_ITEMS_PER_RAW_CONTACT) {
                    long streamItemId = c.getLong(0);
                    if (insertedStreamItemId == streamItemId) {
                        // The stream item just inserted is being deleted.
                        postCleanupInsertedStreamId = 0;
                    }
                    deleteStreamItem(c.getLong(0));
                    c.moveToPrevious();
                }
            }
        } finally {
            c.close();
        }
        return postCleanupInsertedStreamId;
    }

    /**
     * Delete data row by row so that fixing of primaries etc work correctly.
     */
    private int deleteData(String selection, String[] selectionArgs, boolean callerIsSyncAdapter) {
        int count = 0;

        // Note that the query will return data according to the access restrictions,
        // so we don't need to worry about deleting data we don't have permission to read.
        Uri dataUri = inProfileMode()
                ? Uri.withAppendedPath(Profile.CONTENT_URI, RawContacts.Data.CONTENT_DIRECTORY)
                : Data.CONTENT_URI;
        Cursor c = query(dataUri, DataRowHandler.DataDeleteQuery.COLUMNS,
                selection, selectionArgs, null);
        try {
            while(c.moveToNext()) {
                long rawContactId = c.getLong(DataRowHandler.DataDeleteQuery.RAW_CONTACT_ID);
                String mimeType = c.getString(DataRowHandler.DataDeleteQuery.MIMETYPE);
                DataRowHandler rowHandler = getDataRowHandler(mimeType);
                count += rowHandler.delete(mActiveDb.get(), mTransactionContext.get(), c);
                if (!callerIsSyncAdapter) {
                    mTransactionContext.get().markRawContactDirty(rawContactId);
                }
            }
        } finally {
            c.close();
        }

        return count;
    }

    /**
     * Delete a data row provided that it is one of the allowed mime types.
     */
    public int deleteData(long dataId, String[] allowedMimeTypes) {

        // Note that the query will return data according to the access restrictions,
        // so we don't need to worry about deleting data we don't have permission to read.
        mSelectionArgs1[0] = String.valueOf(dataId);
        Cursor c = query(Data.CONTENT_URI, DataRowHandler.DataDeleteQuery.COLUMNS, Data._ID + "=?",
                mSelectionArgs1, null);

        try {
            if (!c.moveToFirst()) {
                return 0;
            }

            String mimeType = c.getString(DataRowHandler.DataDeleteQuery.MIMETYPE);
            boolean valid = false;
            for (int i = 0; i < allowedMimeTypes.length; i++) {
                if (TextUtils.equals(mimeType, allowedMimeTypes[i])) {
                    valid = true;
                    break;
                }
            }

            if (!valid) {
                throw new IllegalArgumentException("Data type mismatch: expected "
                        + Lists.newArrayList(allowedMimeTypes));
            }
            DataRowHandler rowHandler = getDataRowHandler(mimeType);
            return rowHandler.delete(mActiveDb.get(), mTransactionContext.get(), c);
        } finally {
            c.close();
        }
    }

    /**
     * Inserts an item in the groups table
     */
    private long insertGroup(Uri uri, ContentValues values, boolean callerIsSyncAdapter) {
        mValues.clear();
        mValues.putAll(values);

        final long accountId = mDbHelper.get().getOrCreateAccountIdInTransaction(
                resolveAccountWithDataSet(uri, mValues));
        mValues.remove(Groups.ACCOUNT_NAME);
        mValues.remove(Groups.ACCOUNT_TYPE);
        mValues.remove(Groups.DATA_SET);
        mValues.put(GroupsColumns.ACCOUNT_ID, accountId);

        // Replace package with internal mapping
        final String packageName = mValues.getAsString(Groups.RES_PACKAGE);
        if (packageName != null) {
            mValues.put(GroupsColumns.PACKAGE_ID, mDbHelper.get().getPackageId(packageName));
        }
        mValues.remove(Groups.RES_PACKAGE);

        final boolean isFavoritesGroup = mValues.getAsLong(Groups.FAVORITES) != null
                ? mValues.getAsLong(Groups.FAVORITES) != 0
                : false;

        if (!callerIsSyncAdapter) {
            mValues.put(Groups.DIRTY, 1);
        }

        long result = mActiveDb.get().insert(Tables.GROUPS, Groups.TITLE, mValues);

        if (!callerIsSyncAdapter && isFavoritesGroup) {
            // If the inserted group is a favorite group, add all starred raw contacts to it.
            mSelectionArgs1[0] = Long.toString(accountId);
            Cursor c = mActiveDb.get().query(Tables.RAW_CONTACTS,
                    new String[]{RawContacts._ID, RawContacts.STARRED},
                    RawContactsColumns.CONCRETE_ACCOUNT_ID + "=?", mSelectionArgs1,
                    null, null, null);
            try {
                while (c.moveToNext()) {
                    if (c.getLong(1) != 0) {
                        final long rawContactId = c.getLong(0);
                        insertDataGroupMembership(rawContactId, result);
                        mTransactionContext.get().markRawContactDirty(rawContactId);
                    }
                }
            } finally {
                c.close();
            }
        }

        if (mValues.containsKey(Groups.GROUP_VISIBLE)) {
            mVisibleTouched = true;
        }

        return result;
    }

    private long insertSettings(Uri uri, ContentValues values) {
        // Before inserting, ensure that no settings record already exists for the
        // values being inserted (this used to be enforced by a primary key, but that no
        // longer works with the nullable data_set field added).
        String accountName = values.getAsString(Settings.ACCOUNT_NAME);
        String accountType = values.getAsString(Settings.ACCOUNT_TYPE);
        String dataSet = values.getAsString(Settings.DATA_SET);
        Uri.Builder settingsUri = Settings.CONTENT_URI.buildUpon();
        if (accountName != null) {
            settingsUri.appendQueryParameter(Settings.ACCOUNT_NAME, accountName);
        }
        if (accountType != null) {
            settingsUri.appendQueryParameter(Settings.ACCOUNT_TYPE, accountType);
        }
        if (dataSet != null) {
            settingsUri.appendQueryParameter(Settings.DATA_SET, dataSet);
        }
        Cursor c = queryLocal(settingsUri.build(), null, null, null, null, 0, null);
        try {
            if (c.getCount() > 0) {
                // If a record was found, replace it with the new values.
                String selection = null;
                String[] selectionArgs = null;
                if (accountName != null && accountType != null) {
                    selection = Settings.ACCOUNT_NAME + "=? AND " + Settings.ACCOUNT_TYPE + "=?";
                    if (dataSet == null) {
                        selection += " AND " + Settings.DATA_SET + " IS NULL";
                        selectionArgs = new String[] {accountName, accountType};
                    } else {
                        selection += " AND " + Settings.DATA_SET + "=?";
                        selectionArgs = new String[] {accountName, accountType, dataSet};
                    }
                }
                return updateSettings(uri, values, selection, selectionArgs);
            }
        } finally {
            c.close();
        }

        // If we didn't find a duplicate, we're fine to insert.
        final long id = mActiveDb.get().insert(Tables.SETTINGS, null, values);

        if (values.containsKey(Settings.UNGROUPED_VISIBLE)) {
            mVisibleTouched = true;
        }

        return id;
    }

    /**
     * Inserts a status update.
     */
    public long insertStatusUpdate(ContentValues values) {
        final String handle = values.getAsString(StatusUpdates.IM_HANDLE);
        final Integer protocol = values.getAsInteger(StatusUpdates.PROTOCOL);
        String customProtocol = null;

        if (protocol != null && protocol == Im.PROTOCOL_CUSTOM) {
            customProtocol = values.getAsString(StatusUpdates.CUSTOM_PROTOCOL);
            if (TextUtils.isEmpty(customProtocol)) {
                throw new IllegalArgumentException(
                        "CUSTOM_PROTOCOL is required when PROTOCOL=PROTOCOL_CUSTOM");
            }
        }

        long rawContactId = -1;
        long contactId = -1;
        Long dataId = values.getAsLong(StatusUpdates.DATA_ID);
        String accountType = null;
        String accountName = null;
        mSb.setLength(0);
        mSelectionArgs.clear();
        if (dataId != null) {
            // Lookup the contact info for the given data row.

            mSb.append(Tables.DATA + "." + Data._ID + "=?");
            mSelectionArgs.add(String.valueOf(dataId));
        } else {
            // Lookup the data row to attach this presence update to

            if (TextUtils.isEmpty(handle) || protocol == null) {
                throw new IllegalArgumentException("PROTOCOL and IM_HANDLE are required");
            }

            // TODO: generalize to allow other providers to match against email
            boolean matchEmail = Im.PROTOCOL_GOOGLE_TALK == protocol;

            String mimeTypeIdIm = String.valueOf(mDbHelper.get().getMimeTypeIdForIm());
            if (matchEmail) {
                String mimeTypeIdEmail = String.valueOf(mDbHelper.get().getMimeTypeIdForEmail());

                // The following hack forces SQLite to use the (mimetype_id,data1) index, otherwise
                // the "OR" conjunction confuses it and it switches to a full scan of
                // the raw_contacts table.

                // This code relies on the fact that Im.DATA and Email.DATA are in fact the same
                // column - Data.DATA1
                mSb.append(DataColumns.MIMETYPE_ID + " IN (?,?)" +
                        " AND " + Data.DATA1 + "=?" +
                        " AND ((" + DataColumns.MIMETYPE_ID + "=? AND " + Im.PROTOCOL + "=?");
                mSelectionArgs.add(mimeTypeIdEmail);
                mSelectionArgs.add(mimeTypeIdIm);
                mSelectionArgs.add(handle);
                mSelectionArgs.add(mimeTypeIdIm);
                mSelectionArgs.add(String.valueOf(protocol));
                if (customProtocol != null) {
                    mSb.append(" AND " + Im.CUSTOM_PROTOCOL + "=?");
                    mSelectionArgs.add(customProtocol);
                }
                mSb.append(") OR (" + DataColumns.MIMETYPE_ID + "=?))");
                mSelectionArgs.add(mimeTypeIdEmail);
            } else {
                mSb.append(DataColumns.MIMETYPE_ID + "=?" +
                        " AND " + Im.PROTOCOL + "=?" +
                        " AND " + Im.DATA + "=?");
                mSelectionArgs.add(mimeTypeIdIm);
                mSelectionArgs.add(String.valueOf(protocol));
                mSelectionArgs.add(handle);
                if (customProtocol != null) {
                    mSb.append(" AND " + Im.CUSTOM_PROTOCOL + "=?");
                    mSelectionArgs.add(customProtocol);
                }
            }

            if (values.containsKey(StatusUpdates.DATA_ID)) {
                mSb.append(" AND " + DataColumns.CONCRETE_ID + "=?");
                mSelectionArgs.add(values.getAsString(StatusUpdates.DATA_ID));
            }
        }

        Cursor cursor = null;
        try {
            cursor = mActiveDb.get().query(DataContactsQuery.TABLE, DataContactsQuery.PROJECTION,
                    mSb.toString(), mSelectionArgs.toArray(EMPTY_STRING_ARRAY), null, null,
                    Clauses.CONTACT_VISIBLE + " DESC, " + Data.RAW_CONTACT_ID);
            if (cursor.moveToFirst()) {
                dataId = cursor.getLong(DataContactsQuery.DATA_ID);
                rawContactId = cursor.getLong(DataContactsQuery.RAW_CONTACT_ID);
                accountType = cursor.getString(DataContactsQuery.ACCOUNT_TYPE);
                accountName = cursor.getString(DataContactsQuery.ACCOUNT_NAME);
                contactId = cursor.getLong(DataContactsQuery.CONTACT_ID);
            } else {
                // No contact found, return a null URI
                return -1;
            }
        } finally {
            if (cursor != null) {
                cursor.close();
            }
        }

        if (values.containsKey(StatusUpdates.PRESENCE)) {
            if (customProtocol == null) {
                // We cannot allow a null in the custom protocol field, because SQLite3 does not
                // properly enforce uniqueness of null values
                customProtocol = "";
            }

            mValues.clear();
            mValues.put(StatusUpdates.DATA_ID, dataId);
            mValues.put(PresenceColumns.RAW_CONTACT_ID, rawContactId);
            mValues.put(PresenceColumns.CONTACT_ID, contactId);
            mValues.put(StatusUpdates.PROTOCOL, protocol);
            mValues.put(StatusUpdates.CUSTOM_PROTOCOL, customProtocol);
            mValues.put(StatusUpdates.IM_HANDLE, handle);
            if (values.containsKey(StatusUpdates.IM_ACCOUNT)) {
                mValues.put(StatusUpdates.IM_ACCOUNT, values.getAsString(StatusUpdates.IM_ACCOUNT));
            }
            mValues.put(StatusUpdates.PRESENCE,
                    values.getAsString(StatusUpdates.PRESENCE));
            mValues.put(StatusUpdates.CHAT_CAPABILITY,
                    values.getAsString(StatusUpdates.CHAT_CAPABILITY));

            // Insert the presence update
            mActiveDb.get().replace(Tables.PRESENCE, null, mValues);
        }


        if (values.containsKey(StatusUpdates.STATUS)) {
            String status = values.getAsString(StatusUpdates.STATUS);
            String resPackage = values.getAsString(StatusUpdates.STATUS_RES_PACKAGE);
            Resources resources = getContext().getResources();
            if (!TextUtils.isEmpty(resPackage)) {
                PackageManager pm = getContext().getPackageManager();
                try {
                    resources = pm.getResourcesForApplication(resPackage);
                } catch (NameNotFoundException e) {
                    Log.w(TAG, "Contact status update resource package not found: "
                            + resPackage);
                }
            }
            Integer labelResourceId = values.getAsInteger(StatusUpdates.STATUS_LABEL);

            if ((labelResourceId == null || labelResourceId == 0) && protocol != null) {
                labelResourceId = Im.getProtocolLabelResource(protocol);
            }
            String labelResource = getResourceName(resources, "string", labelResourceId);

            Integer iconResourceId = values.getAsInteger(StatusUpdates.STATUS_ICON);
            // TODO compute the default icon based on the protocol

            String iconResource = getResourceName(resources, "drawable", iconResourceId);

            if (TextUtils.isEmpty(status)) {
                mDbHelper.get().deleteStatusUpdate(dataId);
            } else {
                Long timestamp = values.getAsLong(StatusUpdates.STATUS_TIMESTAMP);
                if (timestamp != null) {
                    mDbHelper.get().replaceStatusUpdate(dataId, timestamp, status, resPackage,
                            iconResourceId, labelResourceId);
                } else {
                    mDbHelper.get().insertStatusUpdate(dataId, status, resPackage, iconResourceId,
                            labelResourceId);
                }

                // For forward compatibility with the new stream item API, insert this status update
                // there as well.  If we already have a stream item from this source, update that
                // one instead of inserting a new one (since the semantics of the old status update
                // API is to only have a single record).
                if (rawContactId != -1 && !TextUtils.isEmpty(status)) {
                    ContentValues streamItemValues = new ContentValues();
                    streamItemValues.put(StreamItems.RAW_CONTACT_ID, rawContactId);
                    // Status updates are text only but stream items are HTML.
                    streamItemValues.put(StreamItems.TEXT, statusUpdateToHtml(status));
                    streamItemValues.put(StreamItems.COMMENTS, "");
                    streamItemValues.put(StreamItems.RES_PACKAGE, resPackage);
                    streamItemValues.put(StreamItems.RES_ICON, iconResource);
                    streamItemValues.put(StreamItems.RES_LABEL, labelResource);
                    streamItemValues.put(StreamItems.TIMESTAMP,
                            timestamp == null ? System.currentTimeMillis() : timestamp);

                    // Note: The following is basically a workaround for the fact that status
                    // updates didn't do any sort of account enforcement, while social stream item
                    // updates do.  We can't expect callers of the old API to start passing account
                    // information along, so we just populate the account params appropriately for
                    // the raw contact.  Data set is not relevant here, as we only check account
                    // name and type.
                    if (accountName != null && accountType != null) {
                        streamItemValues.put(RawContacts.ACCOUNT_NAME, accountName);
                        streamItemValues.put(RawContacts.ACCOUNT_TYPE, accountType);
                    }

                    // Check for an existing stream item from this source, and insert or update.
                    Uri streamUri = StreamItems.CONTENT_URI;
                    Cursor c = queryLocal(streamUri, new String[]{StreamItems._ID},
                            StreamItems.RAW_CONTACT_ID + "=?",
                            new String[]{String.valueOf(rawContactId)},
                            null, -1 /* directory ID */, null);
                    try {
                        if (c.getCount() > 0) {
                            c.moveToFirst();
                            updateInTransaction(ContentUris.withAppendedId(streamUri, c.getLong(0)),
                                    streamItemValues, null, null);
                        } else {
                            insertInTransaction(streamUri, streamItemValues);
                        }
                    } finally {
                        c.close();
                    }
                }
            }
        }

        if (contactId != -1) {
            mAggregator.get().updateLastStatusUpdateId(contactId);
        }

        return dataId;
    }

    /** Converts a status update to HTML. */
    private String statusUpdateToHtml(String status) {
        return TextUtils.htmlEncode(status);
    }

    private String getResourceName(Resources resources, String expectedType, Integer resourceId) {
        try {
            if (resourceId == null || resourceId == 0) return null;

            // Resource has an invalid type (e.g. a string as icon)? ignore
            final String resourceEntryName = resources.getResourceEntryName(resourceId);
            final String resourceTypeName = resources.getResourceTypeName(resourceId);
            if (!expectedType.equals(resourceTypeName)) {
                Log.w(TAG, "Resource " + resourceId + " (" + resourceEntryName + ") is of type " +
                        resourceTypeName + " but " + expectedType + " is required.");
                return null;
            }

            return resourceEntryName;
        } catch (NotFoundException e) {
            return null;
        }
    }

    @Override
    protected int deleteInTransaction(Uri uri, String selection, String[] selectionArgs) {
        if (VERBOSE_LOGGING) {
            Log.v(TAG, "deleteInTransaction: " + uri);
        }

        // Default active DB to the contacts DB if none has been set.
        if (mActiveDb.get() == null) {
            mActiveDb.set(mContactsHelper.getWritableDatabase());
        }

        flushTransactionalChanges();
        final boolean callerIsSyncAdapter =
                readBooleanQueryParameter(uri, ContactsContract.CALLER_IS_SYNCADAPTER, false);
        final int match = sUriMatcher.match(uri);
        switch (match) {
            case SYNCSTATE:
            case PROFILE_SYNCSTATE:
                return mDbHelper.get().getSyncState().delete(mActiveDb.get(), selection,
                        selectionArgs);

            case SYNCSTATE_ID: {
                String selectionWithId =
                        (SyncStateContract.Columns._ID + "=" + ContentUris.parseId(uri) + " ")
                        + (selection == null ? "" : " AND (" + selection + ")");
                return mDbHelper.get().getSyncState().delete(mActiveDb.get(), selectionWithId,
                        selectionArgs);
            }

            case PROFILE_SYNCSTATE_ID: {
                String selectionWithId =
                        (SyncStateContract.Columns._ID + "=" + ContentUris.parseId(uri) + " ")
                        + (selection == null ? "" : " AND (" + selection + ")");
                return mProfileHelper.getSyncState().delete(mActiveDb.get(), selectionWithId,
                        selectionArgs);
            }

            case CONTACTS: {
                invalidateFastScrollingIndexCache();
                // TODO
                return 0;
            }

            case CONTACTS_ID: {
                invalidateFastScrollingIndexCache();
                long contactId = ContentUris.parseId(uri);
                return deleteContact(contactId, callerIsSyncAdapter);
            }

            case CONTACTS_LOOKUP: {
                invalidateFastScrollingIndexCache();
                final List<String> pathSegments = uri.getPathSegments();
                final int segmentCount = pathSegments.size();
                if (segmentCount < 3) {
                    throw new IllegalArgumentException(mDbHelper.get().exceptionMessage(
                            "Missing a lookup key", uri));
                }
                final String lookupKey = pathSegments.get(2);
                final long contactId = lookupContactIdByLookupKey(mActiveDb.get(), lookupKey);
                return deleteContact(contactId, callerIsSyncAdapter);
            }

            case CONTACTS_LOOKUP_ID: {
                invalidateFastScrollingIndexCache();
                // lookup contact by id and lookup key to see if they still match the actual record
                final List<String> pathSegments = uri.getPathSegments();
                final String lookupKey = pathSegments.get(2);
                SQLiteQueryBuilder lookupQb = new SQLiteQueryBuilder();
                setTablesAndProjectionMapForContacts(lookupQb, uri, null);
                long contactId = ContentUris.parseId(uri);
                String[] args;
                if (selectionArgs == null) {
                    args = new String[2];
                } else {
                    args = new String[selectionArgs.length + 2];
                    System.arraycopy(selectionArgs, 0, args, 2, selectionArgs.length);
                }
                args[0] = String.valueOf(contactId);
                args[1] = Uri.encode(lookupKey);
                lookupQb.appendWhere(Contacts._ID + "=? AND " + Contacts.LOOKUP_KEY + "=?");
                Cursor c = query(mActiveDb.get(), lookupQb, null, selection, args, null, null,
                        null, null);
                try {
                    if (c.getCount() == 1) {
                        // contact was unmodified so go ahead and delete it
                        return deleteContact(contactId, callerIsSyncAdapter);
                    } else {
                        // row was changed (e.g. the merging might have changed), we got multiple
                        // rows or the supplied selection filtered the record out
                        return 0;
                    }
                } finally {
                    c.close();
                }
            }

            case CONTACTS_DELETE_USAGE: {
                return deleteDataUsage();
            }

            case RAW_CONTACTS:
            case PROFILE_RAW_CONTACTS: {
                invalidateFastScrollingIndexCache();
                int numDeletes = 0;
                Cursor c = mActiveDb.get().query(Views.RAW_CONTACTS,
                        new String[]{RawContacts._ID, RawContacts.CONTACT_ID},
                        appendAccountIdToSelection(uri, selection), selectionArgs,
                        null, null, null);
                try {
                    while (c.moveToNext()) {
                        final long rawContactId = c.getLong(0);
                        long contactId = c.getLong(1);
                        numDeletes += deleteRawContact(rawContactId, contactId,
                                callerIsSyncAdapter);
                    }
                } finally {
                    c.close();
                }
                return numDeletes;
            }

            case RAW_CONTACTS_ID:
            case PROFILE_RAW_CONTACTS_ID: {
                invalidateFastScrollingIndexCache();
                final long rawContactId = ContentUris.parseId(uri);
                return deleteRawContact(rawContactId, mDbHelper.get().getContactId(rawContactId),
                        callerIsSyncAdapter);
            }

            case DATA:
            case PROFILE_DATA: {
                invalidateFastScrollingIndexCache();
                mSyncToNetwork |= !callerIsSyncAdapter;
                return deleteData(appendAccountToSelection(uri, selection), selectionArgs,
                        callerIsSyncAdapter);
            }

            case DATA_ID:
            case PHONES_ID:
            case EMAILS_ID:
            case CALLABLES_ID:
            case POSTALS_ID:
            case PROFILE_DATA_ID: {
                invalidateFastScrollingIndexCache();
                long dataId = ContentUris.parseId(uri);
                mSyncToNetwork |= !callerIsSyncAdapter;
                mSelectionArgs1[0] = String.valueOf(dataId);
                return deleteData(Data._ID + "=?", mSelectionArgs1, callerIsSyncAdapter);
            }

            case GROUPS_ID: {
                mSyncToNetwork |= !callerIsSyncAdapter;
                return deleteGroup(uri, ContentUris.parseId(uri), callerIsSyncAdapter);
            }

            case GROUPS: {
                int numDeletes = 0;
                Cursor c = mActiveDb.get().query(Views.GROUPS, Projections.ID,
                        appendAccountIdToSelection(uri, selection), selectionArgs,
                        null, null, null);
                try {
                    while (c.moveToNext()) {
                        numDeletes += deleteGroup(uri, c.getLong(0), callerIsSyncAdapter);
                    }
                } finally {
                    c.close();
                }
                if (numDeletes > 0) {
                    mSyncToNetwork |= !callerIsSyncAdapter;
                }
                return numDeletes;
            }

            case SETTINGS: {
                mSyncToNetwork |= !callerIsSyncAdapter;
                return deleteSettings(uri, appendAccountToSelection(uri, selection), selectionArgs);
            }

            case STATUS_UPDATES:
            case PROFILE_STATUS_UPDATES: {
                return deleteStatusUpdates(selection, selectionArgs);
            }

            case STREAM_ITEMS: {
                mSyncToNetwork |= !callerIsSyncAdapter;
                return deleteStreamItems(uri, new ContentValues(), selection, selectionArgs);
            }

            case STREAM_ITEMS_ID: {
                mSyncToNetwork |= !callerIsSyncAdapter;
                return deleteStreamItems(uri, new ContentValues(),
                        StreamItems._ID + "=?",
                        new String[]{uri.getLastPathSegment()});
            }

            case RAW_CONTACTS_ID_STREAM_ITEMS_ID: {
                mSyncToNetwork |= !callerIsSyncAdapter;
                String rawContactId = uri.getPathSegments().get(1);
                String streamItemId = uri.getLastPathSegment();
                return deleteStreamItems(uri, new ContentValues(),
                        StreamItems.RAW_CONTACT_ID + "=? AND " + StreamItems._ID + "=?",
                        new String[]{rawContactId, streamItemId});

            }

            case STREAM_ITEMS_ID_PHOTOS: {
                mSyncToNetwork |= !callerIsSyncAdapter;
                String streamItemId = uri.getPathSegments().get(1);
                String selectionWithId =
                        (StreamItemPhotos.STREAM_ITEM_ID + "=" + streamItemId + " ")
                                + (selection == null ? "" : " AND (" + selection + ")");
                return deleteStreamItemPhotos(uri, new ContentValues(),
                        selectionWithId, selectionArgs);
            }

            case STREAM_ITEMS_ID_PHOTOS_ID: {
                mSyncToNetwork |= !callerIsSyncAdapter;
                String streamItemId = uri.getPathSegments().get(1);
                String streamItemPhotoId = uri.getPathSegments().get(3);
                return deleteStreamItemPhotos(uri, new ContentValues(),
                        StreamItemPhotosColumns.CONCRETE_ID + "=? AND "
                                + StreamItemPhotos.STREAM_ITEM_ID + "=?",
                        new String[]{streamItemPhotoId, streamItemId});
            }

            default: {
                mSyncToNetwork = true;
                return mLegacyApiSupport.delete(uri, selection, selectionArgs);
            }
        }
    }

    public int deleteGroup(Uri uri, long groupId, boolean callerIsSyncAdapter) {
        mGroupIdCache.clear();
        final long groupMembershipMimetypeId = mDbHelper.get()
                .getMimeTypeId(GroupMembership.CONTENT_ITEM_TYPE);
        mActiveDb.get().delete(Tables.DATA, DataColumns.MIMETYPE_ID + "="
                + groupMembershipMimetypeId + " AND " + GroupMembership.GROUP_ROW_ID + "="
                + groupId, null);

        try {
            if (callerIsSyncAdapter) {
                return mActiveDb.get().delete(Tables.GROUPS, Groups._ID + "=" + groupId, null);
            } else {
                mValues.clear();
                mValues.put(Groups.DELETED, 1);
                mValues.put(Groups.DIRTY, 1);
                return mActiveDb.get().update(Tables.GROUPS, mValues, Groups._ID + "=" + groupId,
                        null);
            }
        } finally {
            mVisibleTouched = true;
        }
    }

    private int deleteSettings(Uri uri, String selection, String[] selectionArgs) {
        final int count = mActiveDb.get().delete(Tables.SETTINGS, selection, selectionArgs);
        mVisibleTouched = true;
        return count;
    }

    private int deleteContact(long contactId, boolean callerIsSyncAdapter) {
        mSelectionArgs1[0] = Long.toString(contactId);
        Cursor c = mActiveDb.get().query(Tables.RAW_CONTACTS, new String[]{RawContacts._ID},
                RawContacts.CONTACT_ID + "=?", mSelectionArgs1,
                null, null, null);
        try {
            while (c.moveToNext()) {
                long rawContactId = c.getLong(0);
                markRawContactAsDeleted(rawContactId, callerIsSyncAdapter);
            }
        } finally {
            c.close();
        }

        mProviderStatusUpdateNeeded = true;

        return mActiveDb.get().delete(Tables.CONTACTS, Contacts._ID + "=" + contactId, null);
    }

    public int deleteRawContact(long rawContactId, long contactId, boolean callerIsSyncAdapter) {
        mAggregator.get().invalidateAggregationExceptionCache();
        mProviderStatusUpdateNeeded = true;

        // Find and delete stream items associated with the raw contact.
        Cursor c = mActiveDb.get().query(Tables.STREAM_ITEMS,
                new String[]{StreamItems._ID},
                StreamItems.RAW_CONTACT_ID + "=?", new String[]{String.valueOf(rawContactId)},
                null, null, null);
        try {
            while (c.moveToNext()) {
                deleteStreamItem(c.getLong(0));
            }
        } finally {
            c.close();
        }

        if (callerIsSyncAdapter || rawContactIsLocal(rawContactId)) {
            mActiveDb.get().delete(Tables.PRESENCE,
                    PresenceColumns.RAW_CONTACT_ID + "=" + rawContactId, null);
            int count = mActiveDb.get().delete(Tables.RAW_CONTACTS,
                    RawContacts._ID + "=" + rawContactId, null);
            mAggregator.get().updateAggregateData(mTransactionContext.get(), contactId);
            return count;
        } else {
            mDbHelper.get().removeContactIfSingleton(rawContactId);
            return markRawContactAsDeleted(rawContactId, callerIsSyncAdapter);
        }
    }

    /**
     * Returns whether the given raw contact ID is local (i.e. has no account associated with it).
     */
    private boolean rawContactIsLocal(long rawContactId) {
        Cursor c = mActiveDb.get().query(Tables.RAW_CONTACTS, Projections.LITERAL_ONE,
                RawContactsColumns.CONCRETE_ID + "=? AND " +
                RawContactsColumns.ACCOUNT_ID + "=" + Clauses.LOCAL_ACCOUNT_ID,
                new String[] {String.valueOf(rawContactId)}, null, null, null);
        try {
            return c.getCount() > 0;
        } finally {
            c.close();
        }
    }

    private int deleteStatusUpdates(String selection, String[] selectionArgs) {
      // delete from both tables: presence and status_updates
      // TODO should account type/name be appended to the where clause?
      if (VERBOSE_LOGGING) {
          Log.v(TAG, "deleting data from status_updates for " + selection);
      }
      mActiveDb.get().delete(Tables.STATUS_UPDATES, getWhereClauseForStatusUpdatesTable(selection),
          selectionArgs);
      return mActiveDb.get().delete(Tables.PRESENCE, selection, selectionArgs);
    }

    private int deleteStreamItems(Uri uri, ContentValues values, String selection,
            String[] selectionArgs) {
        int count = 0;
        final Cursor c = mActiveDb.get().query(Views.STREAM_ITEMS, Projections.ID,
                selection, selectionArgs, null, null, null);
        try {
            c.moveToPosition(-1);
            while (c.moveToNext()) {
                count += deleteStreamItem(c.getLong(0));
            }
        } finally {
            c.close();
        }
        return count;
    }

    private int deleteStreamItem(long streamItemId) {
        deleteStreamItemPhotos(streamItemId);
        return mActiveDb.get().delete(Tables.STREAM_ITEMS, StreamItems._ID + "=?",
                new String[]{String.valueOf(streamItemId)});
    }

    private int deleteStreamItemPhotos(Uri uri, ContentValues values, String selection,
            String[] selectionArgs) {
        return mActiveDb.get().delete(Tables.STREAM_ITEM_PHOTOS, selection, selectionArgs);
    }

    private int deleteStreamItemPhotos(long streamItemId) {
        // Note that this does not enforce the modifying account.
        return mActiveDb.get().delete(Tables.STREAM_ITEM_PHOTOS,
                StreamItemPhotos.STREAM_ITEM_ID + "=?",
                new String[]{String.valueOf(streamItemId)});
    }

    private int markRawContactAsDeleted(long rawContactId, boolean callerIsSyncAdapter) {
        mSyncToNetwork = true;

        mValues.clear();
        mValues.put(RawContacts.DELETED, 1);
        mValues.put(RawContacts.AGGREGATION_MODE, RawContacts.AGGREGATION_MODE_DISABLED);
        mValues.put(RawContactsColumns.AGGREGATION_NEEDED, 1);
        mValues.putNull(RawContacts.CONTACT_ID);
        mValues.put(RawContacts.DIRTY, 1);
        return updateRawContact(rawContactId, mValues, callerIsSyncAdapter);
    }

    private int deleteDataUsage() {
        final SQLiteDatabase db = mActiveDb.get();
        db.execSQL("UPDATE " + Tables.RAW_CONTACTS + " SET " +
                Contacts.TIMES_CONTACTED + "=0," +
                Contacts.LAST_TIME_CONTACTED + "=NULL"
                );
        db.execSQL("UPDATE " + Tables.CONTACTS + " SET " +
                Contacts.TIMES_CONTACTED + "=0," +
                Contacts.LAST_TIME_CONTACTED + "=NULL"
                );
        db.delete(Tables.DATA_USAGE_STAT, null, null);

        return 1;
    }

    @Override
    protected int updateInTransaction(Uri uri, ContentValues values, String selection,
            String[] selectionArgs) {
        if (VERBOSE_LOGGING) {
            Log.v(TAG, "updateInTransaction: " + uri);
        }

        // Default active DB to the contacts DB if none has been set.
        if (mActiveDb.get() == null) {
            mActiveDb.set(mContactsHelper.getWritableDatabase());
        }

        int count = 0;

        final int match = sUriMatcher.match(uri);
        if (match == SYNCSTATE_ID && selection == null) {
            long rowId = ContentUris.parseId(uri);
            Object data = values.get(ContactsContract.SyncState.DATA);
            mTransactionContext.get().syncStateUpdated(rowId, data);
            return 1;
        }
        flushTransactionalChanges();
        final boolean callerIsSyncAdapter =
                readBooleanQueryParameter(uri, ContactsContract.CALLER_IS_SYNCADAPTER, false);
        switch(match) {
            case SYNCSTATE:
            case PROFILE_SYNCSTATE:
                return mDbHelper.get().getSyncState().update(mActiveDb.get(), values,
                        appendAccountToSelection(uri, selection), selectionArgs);

            case SYNCSTATE_ID: {
                selection = appendAccountToSelection(uri, selection);
                String selectionWithId =
                        (SyncStateContract.Columns._ID + "=" + ContentUris.parseId(uri) + " ")
                        + (selection == null ? "" : " AND (" + selection + ")");
                return mDbHelper.get().getSyncState().update(mActiveDb.get(), values,
                        selectionWithId, selectionArgs);
            }

            case PROFILE_SYNCSTATE_ID: {
                selection = appendAccountToSelection(uri, selection);
                String selectionWithId =
                        (SyncStateContract.Columns._ID + "=" + ContentUris.parseId(uri) + " ")
                        + (selection == null ? "" : " AND (" + selection + ")");
                return mProfileHelper.getSyncState().update(mActiveDb.get(), values,
                        selectionWithId, selectionArgs);
            }

            case CONTACTS:
            case PROFILE: {
                invalidateFastScrollingIndexCache();
                count = updateContactOptions(values, selection, selectionArgs, callerIsSyncAdapter);
                break;
            }

            case CONTACTS_ID: {
                invalidateFastScrollingIndexCache();
                count = updateContactOptions(ContentUris.parseId(uri), values, callerIsSyncAdapter);
                break;
            }

            case CONTACTS_LOOKUP:
            case CONTACTS_LOOKUP_ID: {
                invalidateFastScrollingIndexCache();
                final List<String> pathSegments = uri.getPathSegments();
                final int segmentCount = pathSegments.size();
                if (segmentCount < 3) {
                    throw new IllegalArgumentException(mDbHelper.get().exceptionMessage(
                            "Missing a lookup key", uri));
                }
                final String lookupKey = pathSegments.get(2);
                final long contactId = lookupContactIdByLookupKey(mActiveDb.get(), lookupKey);
                count = updateContactOptions(contactId, values, callerIsSyncAdapter);
                break;
            }

            case RAW_CONTACTS_ID_DATA:
            case PROFILE_RAW_CONTACTS_ID_DATA: {
                invalidateFastScrollingIndexCache();
                int segment = match == RAW_CONTACTS_ID_DATA ? 1 : 2;
                final String rawContactId = uri.getPathSegments().get(segment);
                String selectionWithId = (Data.RAW_CONTACT_ID + "=" + rawContactId + " ")
                    + (selection == null ? "" : " AND " + selection);

                count = updateData(uri, values, selectionWithId, selectionArgs, callerIsSyncAdapter);

                break;
            }

            case DATA:
            case PROFILE_DATA: {
                invalidateFastScrollingIndexCache();
                count = updateData(uri, values, appendAccountToSelection(uri, selection),
                        selectionArgs, callerIsSyncAdapter);
                if (count > 0) {
                    mSyncToNetwork |= !callerIsSyncAdapter;
                }
                break;
            }

            case DATA_ID:
            case PHONES_ID:
            case EMAILS_ID:
            case CALLABLES_ID:
            case POSTALS_ID: {
                invalidateFastScrollingIndexCache();
                count = updateData(uri, values, selection, selectionArgs, callerIsSyncAdapter);
                if (count > 0) {
                    mSyncToNetwork |= !callerIsSyncAdapter;
                }
                break;
            }

            case RAW_CONTACTS:
            case PROFILE_RAW_CONTACTS: {
                invalidateFastScrollingIndexCache();
                selection = appendAccountIdToSelection(uri, selection);
                count = updateRawContacts(values, selection, selectionArgs, callerIsSyncAdapter);
                break;
            }

            case RAW_CONTACTS_ID: {
                invalidateFastScrollingIndexCache();
                long rawContactId = ContentUris.parseId(uri);
                if (selection != null) {
                    selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(rawContactId));
                    count = updateRawContacts(values, RawContacts._ID + "=?"
                                    + " AND(" + selection + ")", selectionArgs,
                            callerIsSyncAdapter);
                } else {
                    mSelectionArgs1[0] = String.valueOf(rawContactId);
                    count = updateRawContacts(values, RawContacts._ID + "=?", mSelectionArgs1,
                            callerIsSyncAdapter);
                }
                break;
            }

            case GROUPS: {
               count = updateGroups(uri, values, appendAccountIdToSelection(uri, selection),
                        selectionArgs, callerIsSyncAdapter);
                if (count > 0) {
                    mSyncToNetwork |= !callerIsSyncAdapter;
                }
                break;
            }

            case GROUPS_ID: {
                long groupId = ContentUris.parseId(uri);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(groupId));
                String selectionWithId = Groups._ID + "=? "
                        + (selection == null ? "" : " AND " + selection);
                count = updateGroups(uri, values, selectionWithId, selectionArgs,
                        callerIsSyncAdapter);
                if (count > 0) {
                    mSyncToNetwork |= !callerIsSyncAdapter;
                }
                break;
            }

            case AGGREGATION_EXCEPTIONS: {
                count = updateAggregationException(mActiveDb.get(), values);
                break;
            }

            case SETTINGS: {
                count = updateSettings(uri, values, appendAccountToSelection(uri, selection),
                        selectionArgs);
                mSyncToNetwork |= !callerIsSyncAdapter;
                break;
            }

            case STATUS_UPDATES:
            case PROFILE_STATUS_UPDATES: {
                count = updateStatusUpdate(uri, values, selection, selectionArgs);
                break;
            }

            case STREAM_ITEMS: {
                count = updateStreamItems(uri, values, selection, selectionArgs);
                break;
            }

            case STREAM_ITEMS_ID: {
                count = updateStreamItems(uri, values, StreamItems._ID + "=?",
                        new String[]{uri.getLastPathSegment()});
                break;
            }

            case RAW_CONTACTS_ID_STREAM_ITEMS_ID: {
                String rawContactId = uri.getPathSegments().get(1);
                String streamItemId = uri.getLastPathSegment();
                count = updateStreamItems(uri, values,
                        StreamItems.RAW_CONTACT_ID + "=? AND " + StreamItems._ID + "=?",
                        new String[]{rawContactId, streamItemId});
                break;
            }

            case STREAM_ITEMS_PHOTOS: {
                count = updateStreamItemPhotos(uri, values, selection, selectionArgs);
                break;
            }

            case STREAM_ITEMS_ID_PHOTOS: {
                String streamItemId = uri.getPathSegments().get(1);
                count = updateStreamItemPhotos(uri, values,
                        StreamItemPhotos.STREAM_ITEM_ID + "=?", new String[]{streamItemId});
                break;
            }

            case STREAM_ITEMS_ID_PHOTOS_ID: {
                String streamItemId = uri.getPathSegments().get(1);
                String streamItemPhotoId = uri.getPathSegments().get(3);
                count = updateStreamItemPhotos(uri, values,
                        StreamItemPhotosColumns.CONCRETE_ID + "=? AND " +
                                StreamItemPhotosColumns.CONCRETE_STREAM_ITEM_ID + "=?",
                        new String[]{streamItemPhotoId, streamItemId});
                break;
            }

            case DIRECTORIES: {
                mContactDirectoryManager.scanPackagesByUid(Binder.getCallingUid());
                count = 1;
                break;
            }

            case DATA_USAGE_FEEDBACK_ID: {
                if (handleDataUsageFeedback(uri)) {
                    count = 1;
                } else {
                    count = 0;
                }
                break;
            }

            default: {
                mSyncToNetwork = true;
                return mLegacyApiSupport.update(uri, values, selection, selectionArgs);
            }
        }

        return count;
    }

    private int updateStatusUpdate(Uri uri, ContentValues values, String selection,
        String[] selectionArgs) {
        // update status_updates table, if status is provided
        // TODO should account type/name be appended to the where clause?
        int updateCount = 0;
        ContentValues settableValues = getSettableColumnsForStatusUpdatesTable(values);
        if (settableValues.size() > 0) {
          updateCount = mActiveDb.get().update(Tables.STATUS_UPDATES,
                    settableValues,
                    getWhereClauseForStatusUpdatesTable(selection),
                    selectionArgs);
        }

        // now update the Presence table
        settableValues = getSettableColumnsForPresenceTable(values);
        if (settableValues.size() > 0) {
          updateCount = mActiveDb.get().update(Tables.PRESENCE, settableValues,
                    selection, selectionArgs);
        }
        // TODO updateCount is not entirely a valid count of updated rows because 2 tables could
        // potentially get updated in this method.
        return updateCount;
    }

    private int updateStreamItems(Uri uri, ContentValues values, String selection,
            String[] selectionArgs) {
        // Stream items can't be moved to a new raw contact.
        values.remove(StreamItems.RAW_CONTACT_ID);

        // Don't attempt to update accounts params - they don't exist in the stream items table.
        values.remove(RawContacts.ACCOUNT_NAME);
        values.remove(RawContacts.ACCOUNT_TYPE);

        // If there's been no exception, the update should be fine.
        return mActiveDb.get().update(Tables.STREAM_ITEMS, values, selection, selectionArgs);
    }

    private int updateStreamItemPhotos(Uri uri, ContentValues values, String selection,
            String[] selectionArgs) {
        // Stream item photos can't be moved to a new stream item.
        values.remove(StreamItemPhotos.STREAM_ITEM_ID);

        // Don't attempt to update accounts params - they don't exist in the stream item
        // photos table.
        values.remove(RawContacts.ACCOUNT_NAME);
        values.remove(RawContacts.ACCOUNT_TYPE);

        // Process the photo (since we're updating, it's valid for the photo to not be present).
        if (processStreamItemPhoto(values, true)) {
            // If there's been no exception, the update should be fine.
            return mActiveDb.get().update(Tables.STREAM_ITEM_PHOTOS, values, selection,
                    selectionArgs);
        }
        return 0;
    }

    /**
     * Build a where clause to select the rows to be updated in status_updates table.
     */
    private String getWhereClauseForStatusUpdatesTable(String selection) {
        mSb.setLength(0);
        mSb.append(WHERE_CLAUSE_FOR_STATUS_UPDATES_TABLE);
        mSb.append(selection);
        mSb.append(")");
        return mSb.toString();
    }

    private ContentValues getSettableColumnsForStatusUpdatesTable(ContentValues values) {
        mValues.clear();
        ContactsDatabaseHelper.copyStringValue(mValues, StatusUpdates.STATUS, values,
            StatusUpdates.STATUS);
        ContactsDatabaseHelper.copyStringValue(mValues, StatusUpdates.STATUS_TIMESTAMP, values,
            StatusUpdates.STATUS_TIMESTAMP);
        ContactsDatabaseHelper.copyStringValue(mValues, StatusUpdates.STATUS_RES_PACKAGE, values,
            StatusUpdates.STATUS_RES_PACKAGE);
        ContactsDatabaseHelper.copyStringValue(mValues, StatusUpdates.STATUS_LABEL, values,
            StatusUpdates.STATUS_LABEL);
        ContactsDatabaseHelper.copyStringValue(mValues, StatusUpdates.STATUS_ICON, values,
            StatusUpdates.STATUS_ICON);
        return mValues;
    }

    private ContentValues getSettableColumnsForPresenceTable(ContentValues values) {
        mValues.clear();
        ContactsDatabaseHelper.copyStringValue(mValues, StatusUpdates.PRESENCE, values,
            StatusUpdates.PRESENCE);
        ContactsDatabaseHelper.copyStringValue(mValues, StatusUpdates.CHAT_CAPABILITY, values,
                StatusUpdates.CHAT_CAPABILITY);
        return mValues;
    }

    private interface GroupAccountQuery {
        String TABLE = Views.GROUPS;

        String[] COLUMNS = new String[] {
                Groups._ID,
                Groups.ACCOUNT_TYPE,
                Groups.ACCOUNT_NAME,
                Groups.DATA_SET,
        };
        int ID = 0;
        int ACCOUNT_TYPE = 1;
        int ACCOUNT_NAME = 2;
        int DATA_SET = 3;
    }

    private int updateGroups(Uri uri, ContentValues originalValues, String selectionWithId,
            String[] selectionArgs, boolean callerIsSyncAdapter) {
        mGroupIdCache.clear();

        final SQLiteDatabase db = mActiveDb.get();
        final ContactsDatabaseHelper dbHelper = mDbHelper.get();

        final ContentValues updatedValues = new ContentValues();
        updatedValues.putAll(originalValues);

        if (!callerIsSyncAdapter && !updatedValues.containsKey(Groups.DIRTY)) {
            updatedValues.put(Groups.DIRTY, 1);
        }
        if (updatedValues.containsKey(Groups.GROUP_VISIBLE)) {
            mVisibleTouched = true;
        }

        // Prepare for account change
        final boolean isAccountNameChanging = updatedValues.containsKey(Groups.ACCOUNT_NAME);
        final boolean isAccountTypeChanging = updatedValues.containsKey(Groups.ACCOUNT_TYPE);
        final boolean isDataSetChanging = updatedValues.containsKey(Groups.DATA_SET);
        final boolean isAccountChanging = isAccountNameChanging || isAccountTypeChanging
                || isDataSetChanging;
        final String updatedAccountName = updatedValues.getAsString(Groups.ACCOUNT_NAME);
        final String updatedAccountType = updatedValues.getAsString(Groups.ACCOUNT_TYPE);
        final String updatedDataSet = updatedValues.getAsString(Groups.DATA_SET);

        updatedValues.remove(Groups.ACCOUNT_NAME);
        updatedValues.remove(Groups.ACCOUNT_TYPE);
        updatedValues.remove(Groups.DATA_SET);

        // We later call requestSync() on all affected accounts.
        final Set<Account> affectedAccounts = Sets.newHashSet();

        // Look for all affected rows, and change them row by row.
        final Cursor c = db.query(GroupAccountQuery.TABLE, GroupAccountQuery.COLUMNS,
                selectionWithId, selectionArgs, null, null, null);
        int returnCount = 0;
        try {
            c.moveToPosition(-1);
            while (c.moveToNext()) {
                final long groupId = c.getLong(GroupAccountQuery.ID);

                mSelectionArgs1[0] = Long.toString(groupId);

                final String accountName = isAccountNameChanging
                        ? updatedAccountName : c.getString(GroupAccountQuery.ACCOUNT_NAME);
                final String accountType = isAccountTypeChanging
                        ? updatedAccountType : c.getString(GroupAccountQuery.ACCOUNT_TYPE);
                final String dataSet = isDataSetChanging
                        ? updatedDataSet : c.getString(GroupAccountQuery.DATA_SET);

                if (isAccountChanging) {
                    final long accountId = dbHelper.getOrCreateAccountIdInTransaction(
                            AccountWithDataSet.get(accountName, accountType, dataSet));
                    updatedValues.put(GroupsColumns.ACCOUNT_ID, accountId);
                }

                // Finally do the actual update.
                final int count = db.update(Tables.GROUPS, updatedValues,
                        GroupsColumns.CONCRETE_ID + "=?", mSelectionArgs1);

                if ((count > 0)
                        && !TextUtils.isEmpty(accountName)
                        && !TextUtils.isEmpty(accountType)) {
                    affectedAccounts.add(new Account(accountName, accountType));
                }

                returnCount += count;
            }
        } finally {
            c.close();
        }

        // TODO: This will not work for groups that have a data set specified, since the content
        // resolver will not be able to request a sync for the right source (unless it is updated
        // to key off account with data set).
        // i.e. requestSync only takes Account, not AccountWithDataSet.
        if (updatedValues.containsKey(Groups.SHOULD_SYNC)
                && updatedValues.getAsInteger(Groups.SHOULD_SYNC) != 0) {
            for (Account account : affectedAccounts) {
                ContentResolver.requestSync(account, ContactsContract.AUTHORITY, new Bundle());
            }
        }
        return returnCount;
    }

    private int updateSettings(Uri uri, ContentValues values, String selection,
            String[] selectionArgs) {
        final int count = mActiveDb.get().update(Tables.SETTINGS, values, selection, selectionArgs);
        if (values.containsKey(Settings.UNGROUPED_VISIBLE)) {
            mVisibleTouched = true;
        }
        return count;
    }

    private int updateRawContacts(ContentValues values, String selection, String[] selectionArgs,
            boolean callerIsSyncAdapter) {
        if (values.containsKey(RawContacts.CONTACT_ID)) {
            throw new IllegalArgumentException(RawContacts.CONTACT_ID + " should not be included " +
                    "in content values. Contact IDs are assigned automatically");
        }

        if (!callerIsSyncAdapter) {
            selection = DatabaseUtils.concatenateWhere(selection,
                    RawContacts.RAW_CONTACT_IS_READ_ONLY + "=0");
        }

        int count = 0;
        Cursor cursor = mActiveDb.get().query(Views.RAW_CONTACTS,
                Projections.ID, selection,
                selectionArgs, null, null, null);
        try {
            while (cursor.moveToNext()) {
                long rawContactId = cursor.getLong(0);
                updateRawContact(rawContactId, values, callerIsSyncAdapter);
                count++;
            }
        } finally {
            cursor.close();
        }

        return count;
    }

    private int updateRawContact(long rawContactId, ContentValues values,
            boolean callerIsSyncAdapter) {
        final String selection = RawContactsColumns.CONCRETE_ID + " = ?";
        mSelectionArgs1[0] = Long.toString(rawContactId);

        final ContactsDatabaseHelper dbHelper = mDbHelper.get();

        final boolean requestUndoDelete = (values.containsKey(RawContacts.DELETED)
                && values.getAsInteger(RawContacts.DELETED) == 0);

        final boolean isAccountNameChanging = values.containsKey(RawContacts.ACCOUNT_NAME);
        final boolean isAccountTypeChanging = values.containsKey(RawContacts.ACCOUNT_TYPE);
        final boolean isDataSetChanging = values.containsKey(RawContacts.DATA_SET);
        final boolean isAccountChanging = isAccountNameChanging || isAccountTypeChanging
                || isDataSetChanging;

        int previousDeleted = 0;
        long accountId = 0;
        String oldAccountType = null;
        String oldAccountName = null;
        String oldDataSet = null;

        if (requestUndoDelete || isAccountChanging) {
            Cursor cursor = mActiveDb.get().query(RawContactsQuery.TABLE, RawContactsQuery.COLUMNS,
                    selection, mSelectionArgs1, null, null, null);
            try {
                if (cursor.moveToFirst()) {
                    previousDeleted = cursor.getInt(RawContactsQuery.DELETED);
                    accountId = cursor.getLong(RawContactsQuery.ACCOUNT_ID);
                    oldAccountType = cursor.getString(RawContactsQuery.ACCOUNT_TYPE);
                    oldAccountName = cursor.getString(RawContactsQuery.ACCOUNT_NAME);
                    oldDataSet = cursor.getString(RawContactsQuery.DATA_SET);
                }
            } finally {
                cursor.close();
            }
            if (isAccountChanging) {
                // We can't change the original ContentValues, as it'll be re-used over all
                // updateRawContact invocations in a transaction, so we need to create a new one.
                // (However we don't want to use mValues here, because mValues may be used in some
                // other methods that are called by this method.)
                final ContentValues originalValues = values;
                values = new ContentValues();
                values.clear();
                values.putAll(originalValues);

                final AccountWithDataSet newAccountWithDataSet = AccountWithDataSet.get(
                        isAccountNameChanging
                            ? values.getAsString(RawContacts.ACCOUNT_NAME) : oldAccountName,
                        isAccountTypeChanging
                            ? values.getAsString(RawContacts.ACCOUNT_TYPE) : oldAccountType,
                        isDataSetChanging
                            ? values.getAsString(RawContacts.DATA_SET) : oldDataSet
                        );
                accountId = dbHelper.getOrCreateAccountIdInTransaction(newAccountWithDataSet);

                values.put(RawContactsColumns.ACCOUNT_ID, accountId);

                values.remove(RawContacts.ACCOUNT_NAME);
                values.remove(RawContacts.ACCOUNT_TYPE);
                values.remove(RawContacts.DATA_SET);
            }
        }
        if (requestUndoDelete) {
            values.put(ContactsContract.RawContacts.AGGREGATION_MODE,
                    ContactsContract.RawContacts.AGGREGATION_MODE_DEFAULT);
        }

        int count = mActiveDb.get().update(Tables.RAW_CONTACTS, values, selection, mSelectionArgs1);
        if (count != 0) {
            if (values.containsKey(RawContacts.AGGREGATION_MODE)) {
                int aggregationMode = values.getAsInteger(RawContacts.AGGREGATION_MODE);

                // As per ContactsContract documentation, changing aggregation mode
                // to DEFAULT should not trigger aggregation
                if (aggregationMode != RawContacts.AGGREGATION_MODE_DEFAULT) {
                    mAggregator.get().markForAggregation(rawContactId, aggregationMode, false);
                }
            }
            if (values.containsKey(RawContacts.STARRED)) {
                if (!callerIsSyncAdapter) {
                    updateFavoritesMembership(rawContactId,
                            values.getAsLong(RawContacts.STARRED) != 0);
                }
                mAggregator.get().updateStarred(rawContactId);
            } else {
                // if this raw contact is being associated with an account, then update the
                // favorites group membership based on whether or not this contact is starred.
                // If it is starred, add a group membership, if one doesn't already exist
                // otherwise delete any matching group memberships.
                if (!callerIsSyncAdapter && isAccountChanging) {
                    boolean starred = 0 != DatabaseUtils.longForQuery(mActiveDb.get(),
                            SELECTION_STARRED_FROM_RAW_CONTACTS,
                            new String[]{Long.toString(rawContactId)});
                    updateFavoritesMembership(rawContactId, starred);
                }
            }

            // if this raw contact is being associated with an account, then add a
            // group membership to the group marked as AutoAdd, if any.
            if (!callerIsSyncAdapter && isAccountChanging) {
                addAutoAddMembership(rawContactId);
            }

            if (values.containsKey(RawContacts.SOURCE_ID)) {
                mAggregator.get().updateLookupKeyForRawContact(mActiveDb.get(), rawContactId);
            }
            if (values.containsKey(RawContacts.NAME_VERIFIED)) {

                // If setting NAME_VERIFIED for this raw contact, reset it for all
                // other raw contacts in the same aggregate
                if (values.getAsInteger(RawContacts.NAME_VERIFIED) != 0) {
                    mDbHelper.get().resetNameVerifiedForOtherRawContacts(rawContactId);
                }
                mAggregator.get().updateDisplayNameForRawContact(mActiveDb.get(), rawContactId);
            }
            if (requestUndoDelete && previousDeleted == 1) {
                // Note before the accounts refactoring, we used to use the *old* account here,
                // which doesn't make sense, so now we pass the *new* account.
                // (In practice it doesn't matter because there's probably no apps that undo-delete
                // and change accounts at the same time.)
                mTransactionContext.get().rawContactInserted(rawContactId, accountId);
            }
        }
        return count;
    }

    private int updateData(Uri uri, ContentValues values, String selection,
            String[] selectionArgs, boolean callerIsSyncAdapter) {
        mValues.clear();
        mValues.putAll(values);
        mValues.remove(Data._ID);
        mValues.remove(Data.RAW_CONTACT_ID);
        mValues.remove(Data.MIMETYPE);

        String packageName = values.getAsString(Data.RES_PACKAGE);
        if (packageName != null) {
            mValues.remove(Data.RES_PACKAGE);
            mValues.put(DataColumns.PACKAGE_ID, mDbHelper.get().getPackageId(packageName));
        }

        if (!callerIsSyncAdapter) {
            selection = DatabaseUtils.concatenateWhere(selection,
                    Data.IS_READ_ONLY + "=0");
        }

        int count = 0;

        // Note that the query will return data according to the access restrictions,
        // so we don't need to worry about updating data we don't have permission to read.
        Cursor c = queryLocal(uri,
                DataRowHandler.DataUpdateQuery.COLUMNS,
                selection, selectionArgs, null, -1 /* directory ID */, null);
        try {
            while(c.moveToNext()) {
                count += updateData(mValues, c, callerIsSyncAdapter);
            }
        } finally {
            c.close();
        }

        return count;
    }

    private int updateData(ContentValues values, Cursor c, boolean callerIsSyncAdapter) {
        if (values.size() == 0) {
            return 0;
        }

        final String mimeType = c.getString(DataRowHandler.DataUpdateQuery.MIMETYPE);
        DataRowHandler rowHandler = getDataRowHandler(mimeType);
        boolean updated =
                rowHandler.update(mActiveDb.get(), mTransactionContext.get(), values, c,
                        callerIsSyncAdapter);
        if (Photo.CONTENT_ITEM_TYPE.equals(mimeType)) {
            scheduleBackgroundTask(BACKGROUND_TASK_CLEANUP_PHOTOS);
        }
        return updated ? 1 : 0;
    }

    private int updateContactOptions(ContentValues values, String selection,
            String[] selectionArgs, boolean callerIsSyncAdapter) {
        int count = 0;
        Cursor cursor = mActiveDb.get().query(Views.CONTACTS,
                new String[] { Contacts._ID }, selection, selectionArgs, null, null, null);
        try {
            while (cursor.moveToNext()) {
                long contactId = cursor.getLong(0);

                updateContactOptions(contactId, values, callerIsSyncAdapter);
                count++;
            }
        } finally {
            cursor.close();
        }

        return count;
    }

    private int updateContactOptions(long contactId, ContentValues values,
            boolean callerIsSyncAdapter) {

        mValues.clear();
        ContactsDatabaseHelper.copyStringValue(mValues, RawContacts.CUSTOM_RINGTONE,
                values, Contacts.CUSTOM_RINGTONE);
        ContactsDatabaseHelper.copyLongValue(mValues, RawContacts.SEND_TO_VOICEMAIL,
                values, Contacts.SEND_TO_VOICEMAIL);
        ContactsDatabaseHelper.copyLongValue(mValues, RawContacts.LAST_TIME_CONTACTED,
                values, Contacts.LAST_TIME_CONTACTED);
        ContactsDatabaseHelper.copyLongValue(mValues, RawContacts.TIMES_CONTACTED,
                values, Contacts.TIMES_CONTACTED);
        ContactsDatabaseHelper.copyLongValue(mValues, RawContacts.STARRED,
                values, Contacts.STARRED);

        // Nothing to update - just return
        if (mValues.size() == 0) {
            return 0;
        }

        if (mValues.containsKey(RawContacts.STARRED)) {
            // Mark dirty when changing starred to trigger sync
            mValues.put(RawContacts.DIRTY, 1);
        }

        mSelectionArgs1[0] = String.valueOf(contactId);
        mActiveDb.get().update(Tables.RAW_CONTACTS, mValues, RawContacts.CONTACT_ID + "=?"
                + " AND " + RawContacts.RAW_CONTACT_IS_READ_ONLY + "=0", mSelectionArgs1);

        if (mValues.containsKey(RawContacts.STARRED) && !callerIsSyncAdapter) {
            Cursor cursor = mActiveDb.get().query(Views.RAW_CONTACTS,
                    new String[] { RawContacts._ID }, RawContacts.CONTACT_ID + "=?",
                    mSelectionArgs1, null, null, null);
            try {
                while (cursor.moveToNext()) {
                    long rawContactId = cursor.getLong(0);
                    updateFavoritesMembership(rawContactId,
                            mValues.getAsLong(RawContacts.STARRED) != 0);
                }
            } finally {
                cursor.close();
            }
        }

        // Copy changeable values to prevent automatically managed fields from
        // being explicitly updated by clients.
        mValues.clear();
        ContactsDatabaseHelper.copyStringValue(mValues, RawContacts.CUSTOM_RINGTONE,
                values, Contacts.CUSTOM_RINGTONE);
        ContactsDatabaseHelper.copyLongValue(mValues, RawContacts.SEND_TO_VOICEMAIL,
                values, Contacts.SEND_TO_VOICEMAIL);
        ContactsDatabaseHelper.copyLongValue(mValues, RawContacts.LAST_TIME_CONTACTED,
                values, Contacts.LAST_TIME_CONTACTED);
        ContactsDatabaseHelper.copyLongValue(mValues, RawContacts.TIMES_CONTACTED,
                values, Contacts.TIMES_CONTACTED);
        ContactsDatabaseHelper.copyLongValue(mValues, RawContacts.STARRED,
                values, Contacts.STARRED);

        int rslt = mActiveDb.get().update(Tables.CONTACTS, mValues, Contacts._ID + "=?",
                mSelectionArgs1);

        if (values.containsKey(Contacts.LAST_TIME_CONTACTED) &&
                !values.containsKey(Contacts.TIMES_CONTACTED)) {
            mActiveDb.get().execSQL(UPDATE_TIMES_CONTACTED_CONTACTS_TABLE, mSelectionArgs1);
            mActiveDb.get().execSQL(UPDATE_TIMES_CONTACTED_RAWCONTACTS_TABLE, mSelectionArgs1);
        }
        return rslt;
    }

    private int updateAggregationException(SQLiteDatabase db, ContentValues values) {
        int exceptionType = values.getAsInteger(AggregationExceptions.TYPE);
        long rcId1 = values.getAsInteger(AggregationExceptions.RAW_CONTACT_ID1);
        long rcId2 = values.getAsInteger(AggregationExceptions.RAW_CONTACT_ID2);

        long rawContactId1;
        long rawContactId2;
        if (rcId1 < rcId2) {
            rawContactId1 = rcId1;
            rawContactId2 = rcId2;
        } else {
            rawContactId2 = rcId1;
            rawContactId1 = rcId2;
        }

        if (exceptionType == AggregationExceptions.TYPE_AUTOMATIC) {
            mSelectionArgs2[0] = String.valueOf(rawContactId1);
            mSelectionArgs2[1] = String.valueOf(rawContactId2);
            db.delete(Tables.AGGREGATION_EXCEPTIONS,
                    AggregationExceptions.RAW_CONTACT_ID1 + "=? AND "
                    + AggregationExceptions.RAW_CONTACT_ID2 + "=?", mSelectionArgs2);
        } else {
            ContentValues exceptionValues = new ContentValues(3);
            exceptionValues.put(AggregationExceptions.TYPE, exceptionType);
            exceptionValues.put(AggregationExceptions.RAW_CONTACT_ID1, rawContactId1);
            exceptionValues.put(AggregationExceptions.RAW_CONTACT_ID2, rawContactId2);
            db.replace(Tables.AGGREGATION_EXCEPTIONS, AggregationExceptions._ID,
                    exceptionValues);
        }

        mAggregator.get().invalidateAggregationExceptionCache();
        mAggregator.get().markForAggregation(rawContactId1,
                RawContacts.AGGREGATION_MODE_DEFAULT, true);
        mAggregator.get().markForAggregation(rawContactId2,
                RawContacts.AGGREGATION_MODE_DEFAULT, true);

        mAggregator.get().aggregateContact(mTransactionContext.get(), db, rawContactId1);
        mAggregator.get().aggregateContact(mTransactionContext.get(), db, rawContactId2);

        // The return value is fake - we just confirm that we made a change, not count actual
        // rows changed.
        return 1;
    }

    public void onAccountsUpdated(Account[] accounts) {
        scheduleBackgroundTask(BACKGROUND_TASK_UPDATE_ACCOUNTS);
    }

    private static final String ACCOUNT_STRING_SEPARATOR_OUTER = "\u0001";
    private static final String ACCOUNT_STRING_SEPARATOR_INNER = "\u0002";

    /** return serialized version of {@code accounts} */
    @VisibleForTesting
    static String accountsToString(Set<Account> accounts) {
        final StringBuilder sb = new StringBuilder();
        for (Account account : accounts) {
            if (sb.length() > 0) {
                sb.append(ACCOUNT_STRING_SEPARATOR_OUTER);
            }
            sb.append(account.name);
            sb.append(ACCOUNT_STRING_SEPARATOR_INNER);
            sb.append(account.type);
        }
        return sb.toString();
    }

    /**
     * de-serialize string returned by {@link #accountsToString} and return it.
     * If {@code accountsString} is malformed it'll throw {@link IllegalArgumentException}.
     */
    @VisibleForTesting
    static Set<Account> stringToAccounts(String accountsString) {
        final Set<Account> ret = Sets.newHashSet();
        if (accountsString.length() == 0) return ret; // no accounts
        try {
            for (String accountString : accountsString.split(ACCOUNT_STRING_SEPARATOR_OUTER)) {
                String[] nameAndType = accountString.split(ACCOUNT_STRING_SEPARATOR_INNER);
                ret.add(new Account(nameAndType[0], nameAndType[1]));
            }
            return ret;
        } catch (RuntimeException ex) {
            throw new IllegalArgumentException("Malformed string", ex);
        }
    }

    /**
     * @return {@code true} if the given {@code currentSystemAccounts} are different from the
     *    accounts we know, which are stored in the {@link DbProperties#KNOWN_ACCOUNTS} property.
     */
    @VisibleForTesting
    boolean haveAccountsChanged(Account[] currentSystemAccounts) {
        final ContactsDatabaseHelper dbHelper = mDbHelper.get();
        final Set<Account> knownAccountSet;
        try {
            knownAccountSet = stringToAccounts(
                    dbHelper.getProperty(DbProperties.KNOWN_ACCOUNTS, ""));
        } catch (IllegalArgumentException e) {
            // Failed to get the last known accounts for an unknown reason.  Let's just
            // treat as if accounts have changed.
            return true;
        }
        final Set<Account> currentAccounts = Sets.newHashSet(currentSystemAccounts);
        return !knownAccountSet.equals(currentAccounts);
    }

    @VisibleForTesting
    void saveAccounts(Account[] systemAccounts) {
        final ContactsDatabaseHelper dbHelper = mDbHelper.get();
        dbHelper.setProperty(DbProperties.KNOWN_ACCOUNTS,
                accountsToString(Sets.newHashSet(systemAccounts)));
    }

    private boolean updateAccountsInBackground(Account[] systemAccounts) {
        if (!haveAccountsChanged(systemAccounts)) {
            return false;
        }
        if ("1".equals(SystemProperties.get(DEBUG_PROPERTY_KEEP_STALE_ACCOUNT_DATA))) {
            Log.w(TAG, "Accounts changed, but not removing stale data for " +
                    DEBUG_PROPERTY_KEEP_STALE_ACCOUNT_DATA);
            return true;
        }
        Log.i(TAG, "Accounts changed");

        invalidateFastScrollingIndexCache();

        final ContactsDatabaseHelper dbHelper = mDbHelper.get();
        final SQLiteDatabase db = dbHelper.getWritableDatabase();
        mActiveDb.set(db);
        db.beginTransaction();

        // WARNING: This method can be run in either contacts mode or profile mode.  It is
        // absolutely imperative that no calls be made inside the following try block that can
        // interact with the contacts DB.  Otherwise it is quite possible for a deadlock to occur.
        try {
            // First, remove stale rows from raw_contacts, groups, and related tables.

            // All accounts that are used in raw_contacts and/or groups.
            final Set<AccountWithDataSet> knownAccountsWithDataSets
                    = dbHelper.getAllAccountsWithDataSets();

            // Find the accounts that have been removed.
            final List<AccountWithDataSet> accountsWithDataSetsToDelete = Lists.newArrayList();
            for (AccountWithDataSet knownAccountWithDataSet : knownAccountsWithDataSets) {
                if (knownAccountWithDataSet.isLocalAccount()
                        || knownAccountWithDataSet.inSystemAccounts(systemAccounts)) {
                    continue;
                }
                accountsWithDataSetsToDelete.add(knownAccountWithDataSet);
            }

            if (!accountsWithDataSetsToDelete.isEmpty()) {
                for (AccountWithDataSet accountWithDataSet : accountsWithDataSetsToDelete) {
                    Log.d(TAG, "removing data for removed account " + accountWithDataSet);
                    final Long accountIdOrNull = dbHelper.getAccountIdOrNull(accountWithDataSet);

                    // getAccountIdOrNull() really shouldn't return null here, but just in case...
                    if (accountIdOrNull != null) {
                        final String[] accountIdParams =
                                new String[] {Long.toString(accountIdOrNull)};
                        db.execSQL(
                                "DELETE FROM " + Tables.GROUPS +
                                " WHERE " + GroupsColumns.ACCOUNT_ID + " = ?",
                                accountIdParams);
                        db.execSQL(
                                "DELETE FROM " + Tables.PRESENCE +
                                " WHERE " + PresenceColumns.RAW_CONTACT_ID + " IN (" +
                                        "SELECT " + RawContacts._ID +
                                        " FROM " + Tables.RAW_CONTACTS +
                                        " WHERE " + RawContactsColumns.ACCOUNT_ID + " = ?)",
                                        accountIdParams);
                        db.execSQL(
                                "DELETE FROM " + Tables.STREAM_ITEM_PHOTOS +
                                " WHERE " + StreamItemPhotos.STREAM_ITEM_ID + " IN (" +
                                        "SELECT " + StreamItems._ID +
                                        " FROM " + Tables.STREAM_ITEMS +
                                        " WHERE " + StreamItems.RAW_CONTACT_ID + " IN (" +
                                                "SELECT " + RawContacts._ID +
                                                " FROM " + Tables.RAW_CONTACTS +
                                                " WHERE " + RawContactsColumns.ACCOUNT_ID + "=?))",
                                                accountIdParams);
                        db.execSQL(
                                "DELETE FROM " + Tables.STREAM_ITEMS +
                                " WHERE " + StreamItems.RAW_CONTACT_ID + " IN (" +
                                        "SELECT " + RawContacts._ID +
                                        " FROM " + Tables.RAW_CONTACTS +
                                        " WHERE " + RawContactsColumns.ACCOUNT_ID + " = ?)",
                                        accountIdParams);
                        db.execSQL(
                                "DELETE FROM " + Tables.RAW_CONTACTS +
                                " WHERE " + RawContactsColumns.ACCOUNT_ID + " = ?",
                                accountIdParams);
                        db.execSQL(
                                "DELETE FROM " + Tables.ACCOUNTS +
                                " WHERE " + AccountsColumns._ID + "=?",
                                accountIdParams);
                    }
                }

                // Find all aggregated contacts that used to contain the raw contacts
                // we have just deleted and see if they are still referencing the deleted
                // names or photos.  If so, fix up those contacts.
                HashSet<Long> orphanContactIds = Sets.newHashSet();
                Cursor cursor = db.rawQuery("SELECT " + Contacts._ID +
                        " FROM " + Tables.CONTACTS +
                        " WHERE (" + Contacts.NAME_RAW_CONTACT_ID + " NOT NULL AND " +
                                Contacts.NAME_RAW_CONTACT_ID + " NOT IN " +
                                        "(SELECT " + RawContacts._ID +
                                        " FROM " + Tables.RAW_CONTACTS + "))" +
                        " OR (" + Contacts.PHOTO_ID + " NOT NULL AND " +
                                Contacts.PHOTO_ID + " NOT IN " +
                                        "(SELECT " + Data._ID +
                                        " FROM " + Tables.DATA + "))", null);
                try {
                    while (cursor.moveToNext()) {
                        orphanContactIds.add(cursor.getLong(0));
                    }
                } finally {
                    cursor.close();
                }

                for (Long contactId : orphanContactIds) {
                    mAggregator.get().updateAggregateData(mTransactionContext.get(), contactId);
                }
                dbHelper.updateAllVisible();

                // Don't bother updating the search index if we're in profile mode - there is no
                // search index for the profile DB, and updating it for the contacts DB in this case
                // makes no sense and risks a deadlock.
                if (!inProfileMode()) {
                    // TODO Fix it.  It only updates index for contacts/raw_contacts that the
                    // current transaction context knows updated, but here in this method we don't
                    // update that information, so effectively it's no-op.
                    // We can probably just schedule BACKGROUND_TASK_UPDATE_SEARCH_INDEX.
                    // (But make sure it's not scheduled yet. We schedule this task in initialize()
                    // too.)
                    updateSearchIndexInTransaction();
                }
            }

            // Second, remove stale rows from Tables.SETTINGS and Tables.DIRECTORIES
            removeStaleAccountRows(Tables.SETTINGS, Settings.ACCOUNT_NAME, Settings.ACCOUNT_TYPE,
                    systemAccounts);
            removeStaleAccountRows(Tables.DIRECTORIES, Directory.ACCOUNT_NAME,
                    Directory.ACCOUNT_TYPE, systemAccounts);

            // Third, remaining tasks that must be done in a transaction.
            // TODO: Should sync state take data set into consideration?
            dbHelper.getSyncState().onAccountsChanged(db, systemAccounts);

            saveAccounts(systemAccounts);

            db.setTransactionSuccessful();
        } finally {
            db.endTransaction();
        }
        mAccountWritability.clear();

        updateContactsAccountCount(systemAccounts);
        updateProviderStatus();
        return true;
    }

    private void updateContactsAccountCount(Account[] accounts) {
        int count = 0;
        for (Account account : accounts) {
            if (isContactsAccount(account)) {
                count++;
            }
        }
        mContactsAccountCount = count;
    }

    protected boolean isContactsAccount(Account account) {
        final IContentService cs = ContentResolver.getContentService();
        try {
            return cs.getIsSyncable(account, ContactsContract.AUTHORITY) > 0;
        } catch (RemoteException e) {
            Log.e(TAG, "Cannot obtain sync flag for account: " + account, e);
            return false;
        }
    }

    public void onPackageChanged(String packageName) {
        scheduleBackgroundTask(BACKGROUND_TASK_UPDATE_DIRECTORIES, packageName);
    }

    public void removeStaleAccountRows(String table, String accountNameColumn,
            String accountTypeColumn, Account[] systemAccounts) {
        final SQLiteDatabase db = mDbHelper.get().getWritableDatabase();
        final Cursor c = db.rawQuery(
                "SELECT DISTINCT " + accountNameColumn +
                "," + accountTypeColumn +
                " FROM " + table, null);
        try {
            c.moveToPosition(-1);
            while (c.moveToNext()) {
                final AccountWithDataSet accountWithDataSet = AccountWithDataSet.get(
                        c.getString(0), c.getString(1), null);
                if (accountWithDataSet.isLocalAccount()
                        || accountWithDataSet.inSystemAccounts(systemAccounts)) {
                    // Account still exists.
                    continue;
                }

                db.execSQL("DELETE FROM " + table +
                        " WHERE " + accountNameColumn + "=? AND " +
                        accountTypeColumn + "=?",
                        new String[] {accountWithDataSet.getAccountName(),
                                accountWithDataSet.getAccountType()});
            }
        } finally {
            c.close();
        }
    }

    @Override
    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
            String sortOrder) {
        return query(uri, projection, selection, selectionArgs, sortOrder, null);
    }

    @Override
    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
            String sortOrder, CancellationSignal cancellationSignal) {
        if (VERBOSE_LOGGING) {
            Log.v(TAG, "query uri=" + uri + " selection=" + selection + " order=" + sortOrder);
        }

        waitForAccess(mReadAccessLatch);

        // Enforce stream items access check if applicable.
        enforceSocialStreamReadPermission(uri);

        // Query the profile DB if appropriate.
        if (mapsToProfileDb(uri)) {
            switchToProfileMode();
            return mProfileProvider.query(uri, projection, selection, selectionArgs, sortOrder,
                    cancellationSignal);
        }

        // Otherwise proceed with a normal query against the contacts DB.
        switchToContactMode();
        mActiveDb.set(mContactsHelper.getReadableDatabase());
        String directory = getQueryParameter(uri, ContactsContract.DIRECTORY_PARAM_KEY);
        if (directory == null) {
            return addSnippetExtrasToCursor(uri,
                    queryLocal(uri, projection, selection, selectionArgs, sortOrder, -1,
                    cancellationSignal));
        } else if (directory.equals("0")) {
            return addSnippetExtrasToCursor(uri,
                    queryLocal(uri, projection, selection, selectionArgs, sortOrder,
                    Directory.DEFAULT, cancellationSignal));
        } else if (directory.equals("1")) {
            return addSnippetExtrasToCursor(uri,
                    queryLocal(uri, projection, selection, selectionArgs, sortOrder,
                    Directory.LOCAL_INVISIBLE, cancellationSignal));
        }

        DirectoryInfo directoryInfo = getDirectoryAuthority(directory);
        if (directoryInfo == null) {
            Log.e(TAG, "Invalid directory ID: " + uri);
            return null;
        }

        Builder builder = new Uri.Builder();
        builder.scheme(ContentResolver.SCHEME_CONTENT);
        builder.authority(directoryInfo.authority);
        builder.encodedPath(uri.getEncodedPath());
        if (directoryInfo.accountName != null) {
            builder.appendQueryParameter(RawContacts.ACCOUNT_NAME, directoryInfo.accountName);
        }
        if (directoryInfo.accountType != null) {
            builder.appendQueryParameter(RawContacts.ACCOUNT_TYPE, directoryInfo.accountType);
        }

        String limit = getLimit(uri);
        if (limit != null) {
            builder.appendQueryParameter(ContactsContract.LIMIT_PARAM_KEY, limit);
        }

        Uri directoryUri = builder.build();

        if (projection == null) {
            projection = getDefaultProjection(uri);
        }

        Cursor cursor = getContext().getContentResolver().query(directoryUri, projection, selection,
                selectionArgs, sortOrder);

        if (cursor == null) {
            return null;
        }

        // Load the cursor contents into a memory cursor (backed by a cursor window) and close the
        // underlying cursor.
        try {
            MemoryCursor memCursor = new MemoryCursor(null, cursor.getColumnNames());
            memCursor.fillFromCursor(cursor);
            return memCursor;
        } finally {
            cursor.close();
        }
    }

    private Cursor addSnippetExtrasToCursor(Uri uri, Cursor cursor) {

        // If the cursor doesn't contain a snippet column, don't bother wrapping it.
        if (cursor.getColumnIndex(SearchSnippetColumns.SNIPPET) < 0) {
            return cursor;
        }

        String query = uri.getLastPathSegment();

        // Snippet data is needed for the snippeting on the client side, so store it in the cursor
        if (cursor instanceof AbstractCursor && deferredSnippetingRequested(uri)){
            Bundle oldExtras = cursor.getExtras();
            Bundle extras = new Bundle();
            if (oldExtras != null) {
                extras.putAll(oldExtras);
            }
            extras.putString(ContactsContract.DEFERRED_SNIPPETING_QUERY, query);

            ((AbstractCursor) cursor).setExtras(extras);
        }
        return cursor;
    }

    private Cursor addDeferredSnippetingExtra(Cursor cursor) {
        if (cursor instanceof AbstractCursor){
            Bundle oldExtras = cursor.getExtras();
            Bundle extras = new Bundle();
            if (oldExtras != null) {
                extras.putAll(oldExtras);
            }
            extras.putBoolean(ContactsContract.DEFERRED_SNIPPETING, true);
            ((AbstractCursor) cursor).setExtras(extras);
        }
        return cursor;
    }

    private static final class DirectoryQuery {
        public static final String[] COLUMNS = new String[] {
                Directory._ID,
                Directory.DIRECTORY_AUTHORITY,
                Directory.ACCOUNT_NAME,
                Directory.ACCOUNT_TYPE
        };

        public static final int DIRECTORY_ID = 0;
        public static final int AUTHORITY = 1;
        public static final int ACCOUNT_NAME = 2;
        public static final int ACCOUNT_TYPE = 3;
    }

    /**
     * Reads and caches directory information for the database.
     */
    private DirectoryInfo getDirectoryAuthority(String directoryId) {
        synchronized (mDirectoryCache) {
            if (!mDirectoryCacheValid) {
                mDirectoryCache.clear();
                SQLiteDatabase db = mDbHelper.get().getReadableDatabase();
                Cursor cursor = db.query(Tables.DIRECTORIES,
                        DirectoryQuery.COLUMNS,
                        null, null, null, null, null);
                try {
                    while (cursor.moveToNext()) {
                        DirectoryInfo info = new DirectoryInfo();
                        String id = cursor.getString(DirectoryQuery.DIRECTORY_ID);
                        info.authority = cursor.getString(DirectoryQuery.AUTHORITY);
                        info.accountName = cursor.getString(DirectoryQuery.ACCOUNT_NAME);
                        info.accountType = cursor.getString(DirectoryQuery.ACCOUNT_TYPE);
                        mDirectoryCache.put(id, info);
                    }
                } finally {
                    cursor.close();
                }
                mDirectoryCacheValid = true;
            }

            return mDirectoryCache.get(directoryId);
        }
    }

    public void resetDirectoryCache() {
        synchronized(mDirectoryCache) {
            mDirectoryCacheValid = false;
        }
    }

    protected Cursor queryLocal(final Uri uri, final String[] projection, String selection,
            String[] selectionArgs, String sortOrder, final long directoryId,
            final CancellationSignal cancellationSignal) {

        // Default active DB to the contacts DB if none has been set.
        if (mActiveDb.get() == null) {
            mActiveDb.set(mContactsHelper.getReadableDatabase());
        }

        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
        String groupBy = null;
        String limit = getLimit(uri);
        boolean snippetDeferred = false;

        // The expression used in bundleLetterCountExtras() to get count.
        String addressBookIndexerCountExpression = null;

        final int match = sUriMatcher.match(uri);
        switch (match) {
            case SYNCSTATE:
            case PROFILE_SYNCSTATE:
                return mDbHelper.get().getSyncState().query(mActiveDb.get(), projection, selection,
                        selectionArgs, sortOrder);

            case CONTACTS: {
                setTablesAndProjectionMapForContacts(qb, uri, projection);
                appendLocalDirectoryAndAccountSelectionIfNeeded(qb, directoryId, uri);
                break;
            }

            case CONTACTS_ID: {
                long contactId = ContentUris.parseId(uri);
                setTablesAndProjectionMapForContacts(qb, uri, projection);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(contactId));
                qb.appendWhere(Contacts._ID + "=?");
                break;
            }

            case CONTACTS_LOOKUP:
            case CONTACTS_LOOKUP_ID: {
                List<String> pathSegments = uri.getPathSegments();
                int segmentCount = pathSegments.size();
                if (segmentCount < 3) {
                    throw new IllegalArgumentException(mDbHelper.get().exceptionMessage(
                            "Missing a lookup key", uri));
                }

                String lookupKey = pathSegments.get(2);
                if (segmentCount == 4) {
                    long contactId = Long.parseLong(pathSegments.get(3));
                    SQLiteQueryBuilder lookupQb = new SQLiteQueryBuilder();
                    setTablesAndProjectionMapForContacts(lookupQb, uri, projection);

                    Cursor c = queryWithContactIdAndLookupKey(lookupQb, mActiveDb.get(), uri,
                            projection, selection, selectionArgs, sortOrder, groupBy, limit,
                            Contacts._ID, contactId, Contacts.LOOKUP_KEY, lookupKey,
                            cancellationSignal);
                    if (c != null) {
                        return c;
                    }
                }

                setTablesAndProjectionMapForContacts(qb, uri, projection);
                selectionArgs = insertSelectionArg(selectionArgs,
                        String.valueOf(lookupContactIdByLookupKey(mActiveDb.get(), lookupKey)));
                qb.appendWhere(Contacts._ID + "=?");
                break;
            }

            case CONTACTS_LOOKUP_DATA:
            case CONTACTS_LOOKUP_ID_DATA:
            case CONTACTS_LOOKUP_PHOTO:
            case CONTACTS_LOOKUP_ID_PHOTO: {
                List<String> pathSegments = uri.getPathSegments();
                int segmentCount = pathSegments.size();
                if (segmentCount < 4) {
                    throw new IllegalArgumentException(mDbHelper.get().exceptionMessage(
                            "Missing a lookup key", uri));
                }
                String lookupKey = pathSegments.get(2);
                if (segmentCount == 5) {
                    long contactId = Long.parseLong(pathSegments.get(3));
                    SQLiteQueryBuilder lookupQb = new SQLiteQueryBuilder();
                    setTablesAndProjectionMapForData(lookupQb, uri, projection, false);
                    if (match == CONTACTS_LOOKUP_PHOTO || match == CONTACTS_LOOKUP_ID_PHOTO) {
                        lookupQb.appendWhere(" AND " + Data._ID + "=" + Contacts.PHOTO_ID);
                    }
                    lookupQb.appendWhere(" AND ");
                    Cursor c = queryWithContactIdAndLookupKey(lookupQb, mActiveDb.get(), uri,
                            projection, selection, selectionArgs, sortOrder, groupBy, limit,
                            Data.CONTACT_ID, contactId, Data.LOOKUP_KEY, lookupKey,
                            cancellationSignal);
                    if (c != null) {
                        return c;
                    }

                    // TODO see if the contact exists but has no data rows (rare)
                }

                setTablesAndProjectionMapForData(qb, uri, projection, false);
                long contactId = lookupContactIdByLookupKey(mActiveDb.get(), lookupKey);
                selectionArgs = insertSelectionArg(selectionArgs,
                        String.valueOf(contactId));
                if (match == CONTACTS_LOOKUP_PHOTO || match == CONTACTS_LOOKUP_ID_PHOTO) {
                    qb.appendWhere(" AND " + Data._ID + "=" + Contacts.PHOTO_ID);
                }
                qb.appendWhere(" AND " + Data.CONTACT_ID + "=?");
                break;
            }

            case CONTACTS_ID_STREAM_ITEMS: {
                long contactId = Long.parseLong(uri.getPathSegments().get(1));
                setTablesAndProjectionMapForStreamItems(qb);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(contactId));
                qb.appendWhere(StreamItems.CONTACT_ID + "=?");
                break;
            }

            case CONTACTS_LOOKUP_STREAM_ITEMS:
            case CONTACTS_LOOKUP_ID_STREAM_ITEMS: {
                List<String> pathSegments = uri.getPathSegments();
                int segmentCount = pathSegments.size();
                if (segmentCount < 4) {
                    throw new IllegalArgumentException(mDbHelper.get().exceptionMessage(
                            "Missing a lookup key", uri));
                }
                String lookupKey = pathSegments.get(2);
                if (segmentCount == 5) {
                    long contactId = Long.parseLong(pathSegments.get(3));
                    SQLiteQueryBuilder lookupQb = new SQLiteQueryBuilder();
                    setTablesAndProjectionMapForStreamItems(lookupQb);
                    Cursor c = queryWithContactIdAndLookupKey(lookupQb, mActiveDb.get(), uri,
                            projection, selection, selectionArgs, sortOrder, groupBy, limit,
                            StreamItems.CONTACT_ID, contactId,
                            StreamItems.CONTACT_LOOKUP_KEY, lookupKey,
                            cancellationSignal);
                    if (c != null) {
                        return c;
                    }
                }

                setTablesAndProjectionMapForStreamItems(qb);
                long contactId = lookupContactIdByLookupKey(mActiveDb.get(), lookupKey);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(contactId));
                qb.appendWhere(RawContacts.CONTACT_ID + "=?");
                break;
            }

            case CONTACTS_AS_VCARD: {
                final String lookupKey = Uri.encode(uri.getPathSegments().get(2));
                long contactId = lookupContactIdByLookupKey(mActiveDb.get(), lookupKey);
                qb.setTables(Views.CONTACTS);
                qb.setProjectionMap(sContactsVCardProjectionMap);
                selectionArgs = insertSelectionArg(selectionArgs,
                        String.valueOf(contactId));
                qb.appendWhere(Contacts._ID + "=?");
                break;
            }

            case CONTACTS_AS_MULTI_VCARD: {
                SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd_HHmmss");
                String currentDateString = dateFormat.format(new Date()).toString();
                return mActiveDb.get().rawQuery(
                    "SELECT" +
                    " 'vcards_' || ? || '.vcf' AS " + OpenableColumns.DISPLAY_NAME + "," +
                    " NULL AS " + OpenableColumns.SIZE,
                    new String[] { currentDateString });
            }

            case CONTACTS_FILTER: {
                String filterParam = "";
                boolean deferredSnipRequested = deferredSnippetingRequested(uri);
                if (uri.getPathSegments().size() > 2) {
                    filterParam = uri.getLastPathSegment();
                }

                // If the query consists of a single word, we can do snippetizing after-the-fact for
                // a performance boost.  Otherwise, we can't defer.
                snippetDeferred = isSingleWordQuery(filterParam)
                    && deferredSnipRequested && snippetNeeded(projection);
                setTablesAndProjectionMapForContactsWithSnippet(
                        qb, uri, projection, filterParam, directoryId,
                        snippetDeferred);
                break;
            }

            case CONTACTS_STREQUENT_FILTER:
            case CONTACTS_STREQUENT: {
                // Basically the resultant SQL should look like this:
                // (SQL for listing starred items)
                // UNION ALL
                // (SQL for listing frequently contacted items)
                // ORDER BY ...

                final boolean phoneOnly = readBooleanQueryParameter(
                        uri, ContactsContract.STREQUENT_PHONE_ONLY, false);
                if (match == CONTACTS_STREQUENT_FILTER && uri.getPathSegments().size() > 3) {
                    String filterParam = uri.getLastPathSegment();
                    StringBuilder sb = new StringBuilder();
                    sb.append(Contacts._ID + " IN ");
                    appendContactFilterAsNestedQuery(sb, filterParam);
                    selection = DbQueryUtils.concatenateClauses(selection, sb.toString());
                }

                String[] subProjection = null;
                if (projection != null) {
                    subProjection = appendProjectionArg(projection, TIMES_USED_SORT_COLUMN);
                }

                // Build the first query for starred
                setTablesAndProjectionMapForContacts(qb, uri, projection, false);
                qb.setProjectionMap(phoneOnly ?
                        sStrequentPhoneOnlyStarredProjectionMap
                        : sStrequentStarredProjectionMap);
                if (phoneOnly) {
                    qb.appendWhere(DbQueryUtils.concatenateClauses(
                            selection, Contacts.HAS_PHONE_NUMBER + "=1"));
                }
                qb.setStrict(true);
                final String starredInnerQuery = qb.buildQuery(subProjection,
                        Contacts.STARRED + "=1", Contacts._ID, null,
                        Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC", null);

                // Reset the builder.
                qb = new SQLiteQueryBuilder();
                qb.setStrict(true);

                // Build the second query for frequent part. These JOINS can be very slow
                // if assembled in the wrong order. Be sure to test changes against huge databases.
                final String frequentInnerQuery;
                if (phoneOnly) {
                    final StringBuilder tableBuilder = new StringBuilder();
                    // In phone only mode, we need to look at view_data instead of
                    // contacts/raw_contacts to obtain actual phone numbers. One problem is that
                    // view_data is much larger than view_contacts, so our query might become much
                    // slower.
                    //
                    // To avoid the possible slow down, we start from data usage table and join
                    // view_data to the table, assuming data usage table is quite smaller than
                    // data rows (almost always it should be), and we don't want any phone
                    // numbers not used by the user. This way sqlite is able to drop a number of
                    // rows in view_data in the early stage of data lookup.
                    tableBuilder.append(Tables.DATA_USAGE_STAT
                            + " INNER JOIN " + Views.DATA + " " + Tables.DATA
                            + " ON (" + DataUsageStatColumns.CONCRETE_DATA_ID + "="
                                + DataColumns.CONCRETE_ID + " AND "
                            + DataUsageStatColumns.CONCRETE_USAGE_TYPE + "="
                                + DataUsageStatColumns.USAGE_TYPE_INT_CALL + ")");
                    appendContactPresenceJoin(tableBuilder, projection, RawContacts.CONTACT_ID);
                    appendContactStatusUpdateJoin(tableBuilder, projection,
                            ContactsColumns.LAST_STATUS_UPDATE_ID);

                    qb.setTables(tableBuilder.toString());
                    qb.setProjectionMap(sStrequentPhoneOnlyFrequentProjectionMap);
                    final long phoneMimeTypeId =
                            mDbHelper.get().getMimeTypeId(Phone.CONTENT_ITEM_TYPE);
                    final long sipMimeTypeId =
                            mDbHelper.get().getMimeTypeId(SipAddress.CONTENT_ITEM_TYPE);
                    qb.appendWhere(DbQueryUtils.concatenateClauses(
                            selection,
                            "(" + Contacts.STARRED + "=0 OR " + Contacts.STARRED + " IS NULL",
                            DataColumns.MIMETYPE_ID + " IN (" +
                            phoneMimeTypeId + ", " + sipMimeTypeId + ")) AND (" +
                            RawContacts.CONTACT_ID + " IN " + Tables.DEFAULT_DIRECTORY + ")"));
                    frequentInnerQuery =
                            qb.buildQuery(subProjection, null, null, null,
                            TIMES_USED_SORT_COLUMN + " DESC", "25");
                } else {
                    setTablesAndProjectionMapForContacts(qb, uri, projection, true);
                    qb.setProjectionMap(sStrequentFrequentProjectionMap);
                    qb.appendWhere(DbQueryUtils.concatenateClauses(
                            selection,
                            "(" + Contacts.STARRED + " =0 OR " + Contacts.STARRED + " IS NULL)"));
                    // Note frequentInnerQuery is a grouping query, so the "IN default_directory"
                    // selection needs to be in HAVING, not in WHERE.
                    final String HAVING =
                            RawContacts.CONTACT_ID + " IN " + Tables.DEFAULT_DIRECTORY;
                    frequentInnerQuery = qb.buildQuery(subProjection,
                            null, Contacts._ID, HAVING, null, "25");
                }

                // We need to wrap the inner queries in an extra select, because they contain
                // their own SORT and LIMIT
                final String frequentQuery = "SELECT * FROM (" + frequentInnerQuery + ")";
                final String starredQuery = "SELECT * FROM (" + starredInnerQuery + ")";

                // Put them together
                final String unionQuery =
                        qb.buildUnionQuery(new String[] {starredQuery, frequentQuery}, null, null);

                // Here, we need to use selection / selectionArgs (supplied from users) "twice",
                // as we want them both for starred items and for frequently contacted items.
                //
                // e.g. if the user specify selection = "starred =?" and selectionArgs = "0",
                // the resultant SQL should be like:
                // SELECT ... WHERE starred =? AND ...
                // UNION ALL
                // SELECT ... WHERE starred =? AND ...
                String[] doubledSelectionArgs = null;
                if (selectionArgs != null) {
                    final int length = selectionArgs.length;
                    doubledSelectionArgs = new String[length * 2];
                    System.arraycopy(selectionArgs, 0, doubledSelectionArgs, 0, length);
                    System.arraycopy(selectionArgs, 0, doubledSelectionArgs, length, length);
                }

                Cursor cursor = mActiveDb.get().rawQuery(unionQuery, doubledSelectionArgs);
                if (cursor != null) {
                    cursor.setNotificationUri(getContext().getContentResolver(),
                            ContactsContract.AUTHORITY_URI);
                }
                return cursor;
            }

            case CONTACTS_FREQUENT: {
                setTablesAndProjectionMapForContacts(qb, uri, projection, true);
                qb.setProjectionMap(sStrequentFrequentProjectionMap);
                groupBy = Contacts._ID;
                if (!TextUtils.isEmpty(sortOrder)) {
                    sortOrder = FREQUENT_ORDER_BY + ", " + sortOrder;
                } else {
                    sortOrder = FREQUENT_ORDER_BY;
                }
                break;
            }

            case CONTACTS_GROUP: {
                setTablesAndProjectionMapForContacts(qb, uri, projection);
                if (uri.getPathSegments().size() > 2) {
                    qb.appendWhere(CONTACTS_IN_GROUP_SELECT);
                    String groupMimeTypeId = String.valueOf(
                            mDbHelper.get().getMimeTypeId(GroupMembership.CONTENT_ITEM_TYPE));
                    selectionArgs = insertSelectionArg(selectionArgs, uri.getLastPathSegment());
                    selectionArgs = insertSelectionArg(selectionArgs, groupMimeTypeId);
                }
                break;
            }

            case PROFILE: {
                setTablesAndProjectionMapForContacts(qb, uri, projection);
                break;
            }

            case PROFILE_ENTITIES: {
                setTablesAndProjectionMapForEntities(qb, uri, projection);
                break;
            }

            case PROFILE_AS_VCARD: {
                qb.setTables(Views.CONTACTS);
                qb.setProjectionMap(sContactsVCardProjectionMap);
                break;
            }

            case CONTACTS_ID_DATA: {
                long contactId = Long.parseLong(uri.getPathSegments().get(1));
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(contactId));
                qb.appendWhere(" AND " + RawContacts.CONTACT_ID + "=?");
                break;
            }

            case CONTACTS_ID_PHOTO: {
                long contactId = Long.parseLong(uri.getPathSegments().get(1));
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(contactId));
                qb.appendWhere(" AND " + RawContacts.CONTACT_ID + "=?");
                qb.appendWhere(" AND " + Data._ID + "=" + Contacts.PHOTO_ID);
                break;
            }

            case CONTACTS_ID_ENTITIES: {
                long contactId = Long.parseLong(uri.getPathSegments().get(1));
                setTablesAndProjectionMapForEntities(qb, uri, projection);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(contactId));
                qb.appendWhere(" AND " + RawContacts.CONTACT_ID + "=?");
                break;
            }

            case CONTACTS_LOOKUP_ENTITIES:
            case CONTACTS_LOOKUP_ID_ENTITIES: {
                List<String> pathSegments = uri.getPathSegments();
                int segmentCount = pathSegments.size();
                if (segmentCount < 4) {
                    throw new IllegalArgumentException(mDbHelper.get().exceptionMessage(
                            "Missing a lookup key", uri));
                }
                String lookupKey = pathSegments.get(2);
                if (segmentCount == 5) {
                    long contactId = Long.parseLong(pathSegments.get(3));
                    SQLiteQueryBuilder lookupQb = new SQLiteQueryBuilder();
                    setTablesAndProjectionMapForEntities(lookupQb, uri, projection);
                    lookupQb.appendWhere(" AND ");

                    Cursor c = queryWithContactIdAndLookupKey(lookupQb, mActiveDb.get(), uri,
                            projection, selection, selectionArgs, sortOrder, groupBy, limit,
                            Contacts.Entity.CONTACT_ID, contactId,
                            Contacts.Entity.LOOKUP_KEY, lookupKey,
                            cancellationSignal);
                    if (c != null) {
                        return c;
                    }
                }

                setTablesAndProjectionMapForEntities(qb, uri, projection);
                selectionArgs = insertSelectionArg(selectionArgs,
                        String.valueOf(lookupContactIdByLookupKey(mActiveDb.get(), lookupKey)));
                qb.appendWhere(" AND " + Contacts.Entity.CONTACT_ID + "=?");
                break;
            }

            case STREAM_ITEMS: {
                setTablesAndProjectionMapForStreamItems(qb);
                break;
            }

            case STREAM_ITEMS_ID: {
                setTablesAndProjectionMapForStreamItems(qb);
                selectionArgs = insertSelectionArg(selectionArgs, uri.getLastPathSegment());
                qb.appendWhere(StreamItems._ID + "=?");
                break;
            }

            case STREAM_ITEMS_LIMIT: {
                return buildSingleRowResult(projection, new String[] {StreamItems.MAX_ITEMS},
                        new Object[] {MAX_STREAM_ITEMS_PER_RAW_CONTACT});
            }

            case STREAM_ITEMS_PHOTOS: {
                setTablesAndProjectionMapForStreamItemPhotos(qb);
                break;
            }

            case STREAM_ITEMS_ID_PHOTOS: {
                setTablesAndProjectionMapForStreamItemPhotos(qb);
                String streamItemId = uri.getPathSegments().get(1);
                selectionArgs = insertSelectionArg(selectionArgs, streamItemId);
                qb.appendWhere(StreamItemPhotosColumns.CONCRETE_STREAM_ITEM_ID + "=?");
                break;
            }

            case STREAM_ITEMS_ID_PHOTOS_ID: {
                setTablesAndProjectionMapForStreamItemPhotos(qb);
                String streamItemId = uri.getPathSegments().get(1);
                String streamItemPhotoId = uri.getPathSegments().get(3);
                selectionArgs = insertSelectionArg(selectionArgs, streamItemPhotoId);
                selectionArgs = insertSelectionArg(selectionArgs, streamItemId);
                qb.appendWhere(StreamItemPhotosColumns.CONCRETE_STREAM_ITEM_ID + "=? AND " +
                        StreamItemPhotosColumns.CONCRETE_ID + "=?");
                break;
            }

            case PHOTO_DIMENSIONS: {
                return buildSingleRowResult(projection,
                        new String[] {DisplayPhoto.DISPLAY_MAX_DIM, DisplayPhoto.THUMBNAIL_MAX_DIM},
                        new Object[] {getMaxDisplayPhotoDim(), getMaxThumbnailDim()});
            }

            case PHONES:
            case CALLABLES: {
                final String mimeTypeIsPhoneExpression =
                        DataColumns.MIMETYPE_ID + "=" + mDbHelper.get().getMimeTypeIdForPhone();
                final String mimeTypeIsSipExpression =
                        DataColumns.MIMETYPE_ID + "=" + mDbHelper.get().getMimeTypeIdForSip();
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                if (match == CALLABLES) {
                    qb.appendWhere(" AND ((" + mimeTypeIsPhoneExpression +
                            ") OR (" + mimeTypeIsSipExpression + "))");
                } else {
                    qb.appendWhere(" AND " + mimeTypeIsPhoneExpression);
                }

                final boolean removeDuplicates = readBooleanQueryParameter(
                        uri, ContactsContract.REMOVE_DUPLICATE_ENTRIES, false);
                if (removeDuplicates) {
                    groupBy = RawContacts.CONTACT_ID + ", " + Data.DATA1;

                    // In this case, because we dedupe phone numbers, the address book indexer needs
                    // to take it into account too.  (Otherwise headers will appear in wrong
                    // positions.)
                    // So use count(distinct pair(CONTACT_ID, PHONE NUMBER)) instead of count(*).
                    // But because there's no such thing as pair() on sqlite, we use
                    // CONTACT_ID || ',' || PHONE NUMBER instead.
                    // This only slows down the query by 14% with 10,000 contacts.
                    addressBookIndexerCountExpression = "DISTINCT "
                            + RawContacts.CONTACT_ID + "||','||" + Data.DATA1;
                }
                break;
            }

            case PHONES_ID:
            case CALLABLES_ID: {
                final String mimeTypeIsPhoneExpression =
                        DataColumns.MIMETYPE_ID + "=" + mDbHelper.get().getMimeTypeIdForPhone();
                final String mimeTypeIsSipExpression =
                        DataColumns.MIMETYPE_ID + "=" + mDbHelper.get().getMimeTypeIdForSip();
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                selectionArgs = insertSelectionArg(selectionArgs, uri.getLastPathSegment());
                if (match == CALLABLES_ID) {
                    qb.appendWhere(" AND ((" + mimeTypeIsPhoneExpression +
                            ") OR (" + mimeTypeIsSipExpression + "))");
                } else {
                    qb.appendWhere(" AND " + mimeTypeIsPhoneExpression);
                }
                qb.appendWhere(" AND " + Data._ID + "=?");
                break;
            }

            case PHONES_FILTER:
            case CALLABLES_FILTER: {
                final String mimeTypeIsPhoneExpression =
                        DataColumns.MIMETYPE_ID + "=" + mDbHelper.get().getMimeTypeIdForPhone();
                final String mimeTypeIsSipExpression =
                        DataColumns.MIMETYPE_ID + "=" + mDbHelper.get().getMimeTypeIdForSip();

                String typeParam = uri.getQueryParameter(DataUsageFeedback.USAGE_TYPE);
                final int typeInt = getDataUsageFeedbackType(typeParam,
                        DataUsageStatColumns.USAGE_TYPE_INT_CALL);
                setTablesAndProjectionMapForData(qb, uri, projection, true, typeInt);
                if (match == CALLABLES_FILTER) {
                    qb.appendWhere(" AND ((" + mimeTypeIsPhoneExpression +
                            ") OR (" + mimeTypeIsSipExpression + "))");
                } else {
                    qb.appendWhere(" AND " + mimeTypeIsPhoneExpression);
                }

                if (uri.getPathSegments().size() > 2) {
                    String filterParam = uri.getLastPathSegment();
                    StringBuilder sb = new StringBuilder();
                    sb.append(" AND (");

                    boolean hasCondition = false;
                    final String ftsMatchQuery = SearchIndexManager.getFtsMatchQuery(
                            filterParam, FtsQueryBuilder.UNSCOPED_NORMALIZING);
                    if (ftsMatchQuery.length() > 0) {
                        sb.append(Data.RAW_CONTACT_ID + " IN " +
                                "(SELECT " + RawContactsColumns.CONCRETE_ID +
                                " FROM " + Tables.SEARCH_INDEX +
                                " JOIN " + Tables.RAW_CONTACTS +
                                " ON (" + Tables.SEARCH_INDEX + "." + SearchIndexColumns.CONTACT_ID
                                        + "=" + RawContactsColumns.CONCRETE_CONTACT_ID + ")" +
                                " WHERE " + SearchIndexColumns.NAME + " MATCH '");
                        sb.append(ftsMatchQuery);
                        sb.append("')");
                        hasCondition = true;
                    }

                    String number = PhoneNumberUtils.normalizeNumber(filterParam);
                    if (!TextUtils.isEmpty(number)) {
                        if (hasCondition) {
                            sb.append(" OR ");
                        }
                        sb.append(Data._ID +
                                " IN (SELECT DISTINCT " + PhoneLookupColumns.DATA_ID
                                + " FROM " + Tables.PHONE_LOOKUP
                                + " WHERE " + PhoneLookupColumns.NORMALIZED_NUMBER + " LIKE '");
                        sb.append(number);
                        sb.append("%')");
                        hasCondition = true;
                    }

                    if (!TextUtils.isEmpty(filterParam) && match == CALLABLES_FILTER) {
                        // If the request is via Callable uri, Sip addresses matching the filter
                        // parameter should be returned.
                        if (hasCondition) {
                            sb.append(" OR ");
                        }
                        sb.append("(");
                        sb.append(mimeTypeIsSipExpression);
                        sb.append(" AND ((" + Data.DATA1 + " LIKE ");
                        DatabaseUtils.appendEscapedSQLString(sb, filterParam + '%');
                        sb.append(") OR (" + Data.DATA1 + " LIKE ");
                        // Users may want SIP URIs starting from "sip:"
                        DatabaseUtils.appendEscapedSQLString(sb, "sip:"+ filterParam + '%');
                        sb.append(")))");
                        hasCondition = true;
                    }

                    if (!hasCondition) {
                        // If it is neither a phone number nor a name, the query should return
                        // an empty cursor.  Let's ensure that.
                        sb.append("0");
                    }
                    sb.append(")");
                    qb.appendWhere(sb);
                }
                if (match == CALLABLES_FILTER) {
                    // If the row is for a phone number that has a normalized form, we should use
                    // the normalized one as PHONES_FILTER does, while we shouldn't do that
                    // if the row is for a sip address.
                    String isPhoneAndHasNormalized = "("
                        + mimeTypeIsPhoneExpression + " AND "
                        + Phone.NORMALIZED_NUMBER + " IS NOT NULL)";
                    groupBy = "(CASE WHEN " + isPhoneAndHasNormalized
                        + " THEN " + Phone.NORMALIZED_NUMBER
                        + " ELSE " + Phone.NUMBER + " END), " + RawContacts.CONTACT_ID;
                } else {
                    groupBy = "(CASE WHEN " + Phone.NORMALIZED_NUMBER
                        + " IS NOT NULL THEN " + Phone.NORMALIZED_NUMBER
                        + " ELSE " + Phone.NUMBER + " END), " + RawContacts.CONTACT_ID;
                }
                if (sortOrder == null) {
                    final String accountPromotionSortOrder = getAccountPromotionSortOrder(uri);
                    if (!TextUtils.isEmpty(accountPromotionSortOrder)) {
                        sortOrder = accountPromotionSortOrder + ", " + PHONE_FILTER_SORT_ORDER;
                    } else {
                        sortOrder = PHONE_FILTER_SORT_ORDER;
                    }
                }
                break;
            }

            case EMAILS: {
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                qb.appendWhere(" AND " + DataColumns.MIMETYPE_ID + " = "
                        + mDbHelper.get().getMimeTypeIdForEmail());

                final boolean removeDuplicates = readBooleanQueryParameter(
                        uri, ContactsContract.REMOVE_DUPLICATE_ENTRIES, false);
                if (removeDuplicates) {
                    groupBy = RawContacts.CONTACT_ID + ", " + Data.DATA1;

                    // See PHONES for more detail.
                    addressBookIndexerCountExpression = "DISTINCT "
                            + RawContacts.CONTACT_ID + "||','||" + Data.DATA1;
                }
                break;
            }

            case EMAILS_ID: {
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                selectionArgs = insertSelectionArg(selectionArgs, uri.getLastPathSegment());
                qb.appendWhere(" AND " + DataColumns.MIMETYPE_ID + " = "
                        + mDbHelper.get().getMimeTypeIdForEmail()
                        + " AND " + Data._ID + "=?");
                break;
            }

            case EMAILS_LOOKUP: {
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                qb.appendWhere(" AND " + DataColumns.MIMETYPE_ID + " = "
                        + mDbHelper.get().getMimeTypeIdForEmail());
                if (uri.getPathSegments().size() > 2) {
                    String email = uri.getLastPathSegment();
                    String address = mDbHelper.get().extractAddressFromEmailAddress(email);
                    selectionArgs = insertSelectionArg(selectionArgs, address);
                    qb.appendWhere(" AND UPPER(" + Email.DATA + ")=UPPER(?)");
                }
                // unless told otherwise, we'll return visible before invisible contacts
                if (sortOrder == null) {
                    sortOrder = "(" + RawContacts.CONTACT_ID + " IN " +
                            Tables.DEFAULT_DIRECTORY + ") DESC";
                }
                break;
            }

            case EMAILS_FILTER: {
                String typeParam = uri.getQueryParameter(DataUsageFeedback.USAGE_TYPE);
                final int typeInt = getDataUsageFeedbackType(typeParam,
                        DataUsageStatColumns.USAGE_TYPE_INT_LONG_TEXT);
                setTablesAndProjectionMapForData(qb, uri, projection, true, typeInt);
                String filterParam = null;

                if (uri.getPathSegments().size() > 3) {
                    filterParam = uri.getLastPathSegment();
                    if (TextUtils.isEmpty(filterParam)) {
                        filterParam = null;
                    }
                }

                if (filterParam == null) {
                    // If the filter is unspecified, return nothing
                    qb.appendWhere(" AND 0");
                } else {
                    StringBuilder sb = new StringBuilder();
                    sb.append(" AND " + Data._ID + " IN (");
                    sb.append(
                            "SELECT " + Data._ID +
                            " FROM " + Tables.DATA +
                            " WHERE " + DataColumns.MIMETYPE_ID + "=");
                    sb.append(mDbHelper.get().getMimeTypeIdForEmail());
                    sb.append(" AND " + Data.DATA1 + " LIKE ");
                    DatabaseUtils.appendEscapedSQLString(sb, filterParam + '%');
                    if (!filterParam.contains("@")) {
                        sb.append(
                                " UNION SELECT " + Data._ID +
                                " FROM " + Tables.DATA +
                                " WHERE +" + DataColumns.MIMETYPE_ID + "=");
                        sb.append(mDbHelper.get().getMimeTypeIdForEmail());
                        sb.append(" AND " + Data.RAW_CONTACT_ID + " IN " +
                                "(SELECT " + RawContactsColumns.CONCRETE_ID +
                                " FROM " + Tables.SEARCH_INDEX +
                                " JOIN " + Tables.RAW_CONTACTS +
                                " ON (" + Tables.SEARCH_INDEX + "." + SearchIndexColumns.CONTACT_ID
                                        + "=" + RawContactsColumns.CONCRETE_CONTACT_ID + ")" +
                                " WHERE " + SearchIndexColumns.NAME + " MATCH '");
                        final String ftsMatchQuery = SearchIndexManager.getFtsMatchQuery(
                                filterParam, FtsQueryBuilder.UNSCOPED_NORMALIZING);
                        sb.append(ftsMatchQuery);
                        sb.append("')");
                    }
                    sb.append(")");
                    qb.appendWhere(sb);
                }
                groupBy = Email.DATA + "," + RawContacts.CONTACT_ID;
                if (sortOrder == null) {
                    final String accountPromotionSortOrder = getAccountPromotionSortOrder(uri);
                    if (!TextUtils.isEmpty(accountPromotionSortOrder)) {
                        sortOrder = accountPromotionSortOrder + ", " + EMAIL_FILTER_SORT_ORDER;
                    } else {
                        sortOrder = EMAIL_FILTER_SORT_ORDER;
                    }
                }
                break;
            }

            case POSTALS: {
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                qb.appendWhere(" AND " + DataColumns.MIMETYPE_ID + " = "
                        + mDbHelper.get().getMimeTypeIdForStructuredPostal());

                final boolean removeDuplicates = readBooleanQueryParameter(
                        uri, ContactsContract.REMOVE_DUPLICATE_ENTRIES, false);
                if (removeDuplicates) {
                    groupBy = RawContacts.CONTACT_ID + ", " + Data.DATA1;

                    // See PHONES for more detail.
                    addressBookIndexerCountExpression = "DISTINCT "
                            + RawContacts.CONTACT_ID + "||','||" + Data.DATA1;
                }
                break;
            }

            case POSTALS_ID: {
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                selectionArgs = insertSelectionArg(selectionArgs, uri.getLastPathSegment());
                qb.appendWhere(" AND " + DataColumns.MIMETYPE_ID + " = "
                        + mDbHelper.get().getMimeTypeIdForStructuredPostal());
                qb.appendWhere(" AND " + Data._ID + "=?");
                break;
            }

            case RAW_CONTACTS:
            case PROFILE_RAW_CONTACTS: {
                setTablesAndProjectionMapForRawContacts(qb, uri);
                break;
            }

            case RAW_CONTACTS_ID:
            case PROFILE_RAW_CONTACTS_ID: {
                long rawContactId = ContentUris.parseId(uri);
                setTablesAndProjectionMapForRawContacts(qb, uri);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(rawContactId));
                qb.appendWhere(" AND " + RawContacts._ID + "=?");
                break;
            }

            case RAW_CONTACTS_ID_DATA:
            case PROFILE_RAW_CONTACTS_ID_DATA: {
                int segment = match == RAW_CONTACTS_ID_DATA ? 1 : 2;
                long rawContactId = Long.parseLong(uri.getPathSegments().get(segment));
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(rawContactId));
                qb.appendWhere(" AND " + Data.RAW_CONTACT_ID + "=?");
                break;
            }

            case RAW_CONTACTS_ID_STREAM_ITEMS: {
                long rawContactId = Long.parseLong(uri.getPathSegments().get(1));
                setTablesAndProjectionMapForStreamItems(qb);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(rawContactId));
                qb.appendWhere(StreamItems.RAW_CONTACT_ID + "=?");
                break;
            }

            case RAW_CONTACTS_ID_STREAM_ITEMS_ID: {
                long rawContactId = Long.parseLong(uri.getPathSegments().get(1));
                long streamItemId = Long.parseLong(uri.getPathSegments().get(3));
                setTablesAndProjectionMapForStreamItems(qb);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(streamItemId));
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(rawContactId));
                qb.appendWhere(StreamItems.RAW_CONTACT_ID + "=? AND " +
                        StreamItems._ID + "=?");
                break;
            }

            case PROFILE_RAW_CONTACTS_ID_ENTITIES: {
                long rawContactId = Long.parseLong(uri.getPathSegments().get(2));
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(rawContactId));
                setTablesAndProjectionMapForRawEntities(qb, uri);
                qb.appendWhere(" AND " + RawContacts._ID + "=?");
                break;
            }

            case DATA:
            case PROFILE_DATA: {
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                break;
            }

            case DATA_ID:
            case PROFILE_DATA_ID: {
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                selectionArgs = insertSelectionArg(selectionArgs, uri.getLastPathSegment());
                qb.appendWhere(" AND " + Data._ID + "=?");
                break;
            }

            case PROFILE_PHOTO: {
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                qb.appendWhere(" AND " + Data._ID + "=" + Contacts.PHOTO_ID);
                break;
            }

            case PHONE_LOOKUP: {
                // Phone lookup cannot be combined with a selection
                selection = null;
                selectionArgs = null;
                if (uri.getBooleanQueryParameter(PhoneLookup.QUERY_PARAMETER_SIP_ADDRESS, false)) {
                    if (TextUtils.isEmpty(sortOrder)) {
                        // Default the sort order to something reasonable so we get consistent
                        // results when callers don't request an ordering
                        sortOrder = Contacts.DISPLAY_NAME + " ASC";
                    }

                    String sipAddress = uri.getPathSegments().size() > 1
                            ? Uri.decode(uri.getLastPathSegment()) : "";
                    setTablesAndProjectionMapForData(qb, uri, null, false, true);
                    StringBuilder sb = new StringBuilder();
                    selectionArgs = mDbHelper.get().buildSipContactQuery(sb, sipAddress);
                    selection = sb.toString();
                } else {
                    if (TextUtils.isEmpty(sortOrder)) {
                        // Default the sort order to something reasonable so we get consistent
                        // results when callers don't request an ordering
                        sortOrder = " length(lookup.normalized_number) DESC";
                    }

                    String number = uri.getPathSegments().size() > 1
                            ? uri.getLastPathSegment() : "";
                    String numberE164 = PhoneNumberUtils.formatNumberToE164(number,
                            mDbHelper.get().getCurrentCountryIso());
                    String normalizedNumber =
                            PhoneNumberUtils.normalizeNumber(number);
                    mDbHelper.get().buildPhoneLookupAndContactQuery(
                            qb, normalizedNumber, numberE164);
                    qb.setProjectionMap(sPhoneLookupProjectionMap);

                    // Peek at the results of the first query (which attempts to use fully
                    // normalized and internationalized numbers for comparison).  If no results
                    // were returned, fall back to doing a match of the trailing 7 digits.
                    qb.setStrict(true);
                    boolean foundResult = false;
                    Cursor cursor = query(mActiveDb.get(), qb, projection, selection, selectionArgs,
                            sortOrder, groupBy, limit, cancellationSignal);
                    try {
                        if (cursor.getCount() > 0) {
                            foundResult = true;
                            return cursor;
                        } else {
                            qb = new SQLiteQueryBuilder();
                            mDbHelper.get().buildMinimalPhoneLookupAndContactQuery(
                                    qb, normalizedNumber);
                            qb.setProjectionMap(sPhoneLookupProjectionMap);
                        }
                    } finally {
                        if (!foundResult) {
                            // We'll be returning a different cursor, so close this one.
                            cursor.close();
                        }
                    }
                }
                break;
            }

            case GROUPS: {
                qb.setTables(Views.GROUPS);
                qb.setProjectionMap(sGroupsProjectionMap);
                appendAccountIdFromParameter(qb, uri);
                break;
            }

            case GROUPS_ID: {
                qb.setTables(Views.GROUPS);
                qb.setProjectionMap(sGroupsProjectionMap);
                selectionArgs = insertSelectionArg(selectionArgs, uri.getLastPathSegment());
                qb.appendWhere(Groups._ID + "=?");
                break;
            }

            case GROUPS_SUMMARY: {
                String tables = Views.GROUPS + " AS " + Tables.GROUPS;
                if (ContactsDatabaseHelper.isInProjection(projection, Groups.SUMMARY_COUNT)) {
                    tables = tables + Joins.GROUP_MEMBER_COUNT;
                }
                if (ContactsDatabaseHelper.isInProjection(projection,
                        Groups.SUMMARY_GROUP_COUNT_PER_ACCOUNT)) {
                    // TODO Add join for this column too (and update the projection map)
                    // TODO Also remove Groups.PARAM_RETURN_GROUP_COUNT_PER_ACCOUNT when it works.
                    Log.w(TAG, Groups.SUMMARY_GROUP_COUNT_PER_ACCOUNT + " is not supported yet");
                }
                qb.setTables(tables);
                qb.setProjectionMap(sGroupsSummaryProjectionMap);
                appendAccountIdFromParameter(qb, uri);
                groupBy = GroupsColumns.CONCRETE_ID;
                break;
            }

            case AGGREGATION_EXCEPTIONS: {
                qb.setTables(Tables.AGGREGATION_EXCEPTIONS);
                qb.setProjectionMap(sAggregationExceptionsProjectionMap);
                break;
            }

            case AGGREGATION_SUGGESTIONS: {
                long contactId = Long.parseLong(uri.getPathSegments().get(1));
                String filter = null;
                if (uri.getPathSegments().size() > 3) {
                    filter = uri.getPathSegments().get(3);
                }
                final int maxSuggestions;
                if (limit != null) {
                    maxSuggestions = Integer.parseInt(limit);
                } else {
                    maxSuggestions = DEFAULT_MAX_SUGGESTIONS;
                }

                ArrayList<AggregationSuggestionParameter> parameters = null;
                List<String> query = uri.getQueryParameters("query");
                if (query != null && !query.isEmpty()) {
                    parameters = new ArrayList<AggregationSuggestionParameter>(query.size());
                    for (String parameter : query) {
                        int offset = parameter.indexOf(':');
                        parameters.add(offset == -1
                                ? new AggregationSuggestionParameter(
                                        AggregationSuggestions.PARAMETER_MATCH_NAME,
                                        parameter)
                                : new AggregationSuggestionParameter(
                                        parameter.substring(0, offset),
                                        parameter.substring(offset + 1)));
                    }
                }

                setTablesAndProjectionMapForContacts(qb, uri, projection);

                return mAggregator.get().queryAggregationSuggestions(qb, projection, contactId,
                        maxSuggestions, filter, parameters);
            }

            case SETTINGS: {
                qb.setTables(Tables.SETTINGS);
                qb.setProjectionMap(sSettingsProjectionMap);
                appendAccountFromParameter(qb, uri);

                // When requesting specific columns, this query requires
                // late-binding of the GroupMembership MIME-type.
                final String groupMembershipMimetypeId = Long.toString(mDbHelper.get()
                        .getMimeTypeId(GroupMembership.CONTENT_ITEM_TYPE));
                if (projection != null && projection.length != 0 &&
                        mDbHelper.get().isInProjection(projection, Settings.UNGROUPED_COUNT)) {
                    selectionArgs = insertSelectionArg(selectionArgs, groupMembershipMimetypeId);
                }
                if (projection != null && projection.length != 0 &&
                        mDbHelper.get().isInProjection(
                                projection, Settings.UNGROUPED_WITH_PHONES)) {
                    selectionArgs = insertSelectionArg(selectionArgs, groupMembershipMimetypeId);
                }

                break;
            }

            case STATUS_UPDATES:
            case PROFILE_STATUS_UPDATES: {
                setTableAndProjectionMapForStatusUpdates(qb, projection);
                break;
            }

            case STATUS_UPDATES_ID: {
                setTableAndProjectionMapForStatusUpdates(qb, projection);
                selectionArgs = insertSelectionArg(selectionArgs, uri.getLastPathSegment());
                qb.appendWhere(DataColumns.CONCRETE_ID + "=?");
                break;
            }

            case SEARCH_SUGGESTIONS: {
                return mGlobalSearchSupport.handleSearchSuggestionsQuery(
                        mActiveDb.get(), uri, projection, limit);
            }

            case SEARCH_SHORTCUT: {
                String lookupKey = uri.getLastPathSegment();
                String filter = getQueryParameter(
                        uri, SearchManager.SUGGEST_COLUMN_INTENT_EXTRA_DATA);
                return mGlobalSearchSupport.handleSearchShortcutRefresh(
                        mActiveDb.get(), projection, lookupKey, filter);
            }

            case RAW_CONTACT_ENTITIES:
            case PROFILE_RAW_CONTACT_ENTITIES: {
                setTablesAndProjectionMapForRawEntities(qb, uri);
                break;
            }

            case RAW_CONTACT_ID_ENTITY: {
                long rawContactId = Long.parseLong(uri.getPathSegments().get(1));
                setTablesAndProjectionMapForRawEntities(qb, uri);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(rawContactId));
                qb.appendWhere(" AND " + RawContacts._ID + "=?");
                break;
            }

            case PROVIDER_STATUS: {
                return buildSingleRowResult(projection,
                        new String[] {ProviderStatus.STATUS, ProviderStatus.DATA1},
                        new Object[] {mProviderStatus, mEstimatedStorageRequirement});
            }

            case DIRECTORIES : {
                qb.setTables(Tables.DIRECTORIES);
                qb.setProjectionMap(sDirectoryProjectionMap);
                break;
            }

            case DIRECTORIES_ID : {
                long id = ContentUris.parseId(uri);
                qb.setTables(Tables.DIRECTORIES);
                qb.setProjectionMap(sDirectoryProjectionMap);
                selectionArgs = insertSelectionArg(selectionArgs, String.valueOf(id));
                qb.appendWhere(Directory._ID + "=?");
                break;
            }

            case COMPLETE_NAME: {
                return completeName(uri, projection);
            }

            default:
                return mLegacyApiSupport.query(uri, projection, selection, selectionArgs,
                        sortOrder, limit);
        }

        qb.setStrict(true);

        Cursor cursor =
                query(mActiveDb.get(), qb, projection, selection, selectionArgs, sortOrder, groupBy,
                limit, cancellationSignal);

        if (readBooleanQueryParameter(uri, ContactCounts.ADDRESS_BOOK_INDEX_EXTRAS, false)) {
            bundleFastScrollingIndexExtras(cursor, uri, mActiveDb.get(), qb, selection,
                    selectionArgs, sortOrder, addressBookIndexerCountExpression,
                    cancellationSignal);
        }
        if (snippetDeferred) {
            cursor = addDeferredSnippetingExtra(cursor);
        }

        return cursor;
    }

    private Cursor query(final SQLiteDatabase db, SQLiteQueryBuilder qb, String[] projection,
            String selection, String[] selectionArgs, String sortOrder, String groupBy,
            String limit, CancellationSignal cancellationSignal) {
        if (projection != null && projection.length == 1
                && BaseColumns._COUNT.equals(projection[0])) {
            qb.setProjectionMap(sCountProjectionMap);
        }
        final Cursor c = qb.query(db, projection, selection, selectionArgs, groupBy, null,
                sortOrder, limit, cancellationSignal);
        if (c != null) {
            c.setNotificationUri(getContext().getContentResolver(), ContactsContract.AUTHORITY_URI);
        }
        return c;
    }


    /**
     * Runs the query with the supplied contact ID and lookup ID.  If the query succeeds,
     * it returns the resulting cursor, otherwise it returns null and the calling
     * method needs to resolve the lookup key and rerun the query.
     * @param cancellationSignal
     */
    private Cursor queryWithContactIdAndLookupKey(SQLiteQueryBuilder lookupQb,
            SQLiteDatabase db, Uri uri,
            String[] projection, String selection, String[] selectionArgs,
            String sortOrder, String groupBy, String limit,
            String contactIdColumn, long contactId, String lookupKeyColumn, String lookupKey,
            CancellationSignal cancellationSignal) {
        String[] args;
        if (selectionArgs == null) {
            args = new String[2];
        } else {
            args = new String[selectionArgs.length + 2];
            System.arraycopy(selectionArgs, 0, args, 2, selectionArgs.length);
        }
        args[0] = String.valueOf(contactId);
        args[1] = Uri.encode(lookupKey);
        lookupQb.appendWhere(contactIdColumn + "=? AND " + lookupKeyColumn + "=?");
        Cursor c = query(db, lookupQb, projection, selection, args, sortOrder,
                groupBy, limit, cancellationSignal);
        if (c.getCount() != 0) {
            return c;
        }

        c.close();
        return null;
    }

    private void invalidateFastScrollingIndexCache() {
        if (VERBOSE_LOGGING) {
            Log.v(TAG, "invalidatemFastScrollingIndexCache");
        }

        // FastScrollingIndexCache is thread-safe, no need to synchronize here.
        mFastScrollingIndexCache.invalidate();
    }

    /**
     * Add the "fast scrolling index" bundle, generated by {@link #getFastScrollingIndexExtras},
     * to a cursor as extras.  It first checks {@link FastScrollingIndexCache} to see if we
     * already have a cached result.
     */
    private void bundleFastScrollingIndexExtras(Cursor cursor, Uri queryUri,
            final SQLiteDatabase db, SQLiteQueryBuilder qb, String selection,
            String[] selectionArgs, String sortOrder, String countExpression,
            CancellationSignal cancellationSignal) {
        if (!(cursor instanceof AbstractCursor)) {
            Log.w(TAG, "Unable to bundle extras.  Cursor is not AbstractCursor.");
            return;
        }
        Bundle b;
        // Note even though FastScrollingIndexCache is thread-safe, we really need to put the
        // put-get pair in a single synchronized block, so that even if multiple-threads request the
        // same index at the same time (which actually happens on the phone app) we only execute
        // the query once.
        //
        // This doesn't cause deadlock, because only reader threads get here but not writer
        // threads.  (Writer threads may call invalidateFastScrollingIndexCache(), but it doesn't
        // synchronize on mFastScrollingIndexCache)
        //
        // All reader and writer threads share the single lock object internally in
        // FastScrollingIndexCache, but the lock scope is limited within each put(), get() and
        // invalidate() call, so it won't deadlock.

        // Synchronizing on a non-static field is generally not a good idea, but nobody should
        // modify mFastScrollingIndexCache once initialized, and it shouldn't be null at this point.
        synchronized (mFastScrollingIndexCache) {
            // First, try the cache.
            mFastScrollingIndexCacheRequestCount++;
            b = mFastScrollingIndexCache.get(queryUri, selection, selectionArgs, sortOrder,
                    countExpression);

            if (b == null) {
                mFastScrollingIndexCacheMissCount++;
                // Not in the cache.  Generate and put.
                final long start = System.currentTimeMillis();

                b = getFastScrollingIndexExtras(queryUri, db, qb, selection, selectionArgs,
                        sortOrder, countExpression, cancellationSignal, getLocale());

                final long end = System.currentTimeMillis();
                final int time = (int) (end - start);
                mTotalTimeFastScrollingIndexGenerate += time;
                if (VERBOSE_LOGGING) {
                    Log.v(TAG, "getLetterCountExtraBundle took " + time + "ms");
                }
                mFastScrollingIndexCache.put(queryUri, selection, selectionArgs, sortOrder,
                        countExpression, b);
            }
        }
        ((AbstractCursor) cursor).setExtras(b);
    }

    private static final class AddressBookIndexQuery {
        public static final String LETTER = "letter";
        public static final String TITLE = "title";
        public static final String COUNT = "count";

        public static final String[] COLUMNS = new String[] {
                LETTER, TITLE, COUNT
        };

        public static final int COLUMN_LETTER = 0;
        public static final int COLUMN_TITLE = 1;
        public static final int COLUMN_COUNT = 2;

        // The first letter of the sort key column is what is used for the index headings.
        public static final String SECTION_HEADING = "SUBSTR(%1$s,1,1)";

        public static final String ORDER_BY = LETTER + " COLLATE " + PHONEBOOK_COLLATOR_NAME;
    }

    /**
     * Computes counts by the address book index titles and returns it as {@link Bundle} which
     * will be appended to a {@link Cursor} as extras.
     */
    private static Bundle getFastScrollingIndexExtras(final Uri queryUri, final SQLiteDatabase db,
            final SQLiteQueryBuilder qb, final String selection, final String[] selectionArgs,
            final String sortOrder, String countExpression,
            final CancellationSignal cancellationSignal, final Locale currentLocale) {
        String sortKey;

        // The sort order suffix could be something like "DESC".
        // We want to preserve it in the query even though we will change
        // the sort column itself.
        String sortOrderSuffix = "";
        if (sortOrder != null) {
            int spaceIndex = sortOrder.indexOf(' ');
            if (spaceIndex != -1) {
                sortKey = sortOrder.substring(0, spaceIndex);
                sortOrderSuffix = sortOrder.substring(spaceIndex);
            } else {
                sortKey = sortOrder;
            }
        } else {
            sortKey = Contacts.SORT_KEY_PRIMARY;
        }

        HashMap<String, String> projectionMap = Maps.newHashMap();
        String sectionHeading = String.format(Locale.US, AddressBookIndexQuery.SECTION_HEADING,
                sortKey);
        projectionMap.put(AddressBookIndexQuery.LETTER,
                sectionHeading + " AS " + AddressBookIndexQuery.LETTER);

        // If "what to count" is not specified, we just count all records.
        if (TextUtils.isEmpty(countExpression)) {
            countExpression = "*";
        }

        /**
         * Use the GET_PHONEBOOK_INDEX function, which is an android extension for SQLite3,
         * to map the first letter of the sort key to a character that is traditionally
         * used in phonebooks to represent that letter.  For example, in Korean it will
         * be the first consonant in the letter; for Japanese it will be Hiragana rather
         * than Katakana.
         */
        projectionMap.put(AddressBookIndexQuery.TITLE,
                "GET_PHONEBOOK_INDEX(" + sectionHeading + ",'" + currentLocale.toString() + "')"
                        + " AS " + AddressBookIndexQuery.TITLE);
        projectionMap.put(AddressBookIndexQuery.COUNT,
                "COUNT(" + countExpression + ") AS " + AddressBookIndexQuery.COUNT);
        qb.setProjectionMap(projectionMap);

        Cursor indexCursor = qb.query(db, AddressBookIndexQuery.COLUMNS, selection, selectionArgs,
                AddressBookIndexQuery.ORDER_BY, null /* having */,
                AddressBookIndexQuery.ORDER_BY + sortOrderSuffix,
                null, cancellationSignal);

        try {
            int groupCount = indexCursor.getCount();
            String titles[] = new String[groupCount];
            int counts[] = new int[groupCount];
            int indexCount = 0;
            String currentTitle = null;

            // Since GET_PHONEBOOK_INDEX is a many-to-1 function, we may end up
            // with multiple entries for the same title.  The following code
            // collapses those duplicates.
            for (int i = 0; i < groupCount; i++) {
                indexCursor.moveToNext();
                String title = indexCursor.getString(AddressBookIndexQuery.COLUMN_TITLE);
                if (title == null) {
                    title = "";
                }
                int count = indexCursor.getInt(AddressBookIndexQuery.COLUMN_COUNT);
                if (indexCount == 0 || !TextUtils.equals(title, currentTitle)) {
                    titles[indexCount] = currentTitle = title;
                    counts[indexCount] = count;
                    indexCount++;
                } else {
                    counts[indexCount - 1] += count;
                }
            }

            if (indexCount < groupCount) {
                String[] newTitles = new String[indexCount];
                System.arraycopy(titles, 0, newTitles, 0, indexCount);
                titles = newTitles;

                int[] newCounts = new int[indexCount];
                System.arraycopy(counts, 0, newCounts, 0, indexCount);
                counts = newCounts;
            }
            return FastScrollingIndexCache.buildExtraBundle(titles, counts);
        } finally {
            indexCursor.close();
        }
    }

    /**
     * Returns the contact Id for the contact identified by the lookupKey.
     * Robust against changes in the lookup key: if the key has changed, will
     * look up the contact by the raw contact IDs or name encoded in the lookup
     * key.
     */
    public long lookupContactIdByLookupKey(SQLiteDatabase db, String lookupKey) {
        ContactLookupKey key = new ContactLookupKey();
        ArrayList<LookupKeySegment> segments = key.parse(lookupKey);

        long contactId = -1;
        if (lookupKeyContainsType(segments, ContactLookupKey.LOOKUP_TYPE_PROFILE)) {
            // We should already be in a profile database context, so just look up a single contact.
           contactId = lookupSingleContactId(db);
        }

        if (lookupKeyContainsType(segments, ContactLookupKey.LOOKUP_TYPE_SOURCE_ID)) {
            contactId = lookupContactIdBySourceIds(db, segments);
            if (contactId != -1) {
                return contactId;
            }
        }

        boolean hasRawContactIds =
                lookupKeyContainsType(segments, ContactLookupKey.LOOKUP_TYPE_RAW_CONTACT_ID);
        if (hasRawContactIds) {
            contactId = lookupContactIdByRawContactIds(db, segments);
            if (contactId != -1) {
                return contactId;
            }
        }

        if (hasRawContactIds
                || lookupKeyContainsType(segments, ContactLookupKey.LOOKUP_TYPE_DISPLAY_NAME)) {
            contactId = lookupContactIdByDisplayNames(db, segments);
        }

        return contactId;
    }

    private long lookupSingleContactId(SQLiteDatabase db) {
        Cursor c = db.query(Tables.CONTACTS, new String[] {Contacts._ID},
                null, null, null, null, null, "1");
        try {
            if (c.moveToFirst()) {
                return c.getLong(0);
            } else {
                return -1;
            }
        } finally {
            c.close();
        }
    }

    private interface LookupBySourceIdQuery {
        String TABLE = Views.RAW_CONTACTS;

        String COLUMNS[] = {
                RawContacts.CONTACT_ID,
                RawContacts.ACCOUNT_TYPE_AND_DATA_SET,
                RawContacts.ACCOUNT_NAME,
                RawContacts.SOURCE_ID
        };

        int CONTACT_ID = 0;
        int ACCOUNT_TYPE_AND_DATA_SET = 1;
        int ACCOUNT_NAME = 2;
        int SOURCE_ID = 3;
    }

    private long lookupContactIdBySourceIds(SQLiteDatabase db,
                ArrayList<LookupKeySegment> segments) {
        StringBuilder sb = new StringBuilder();
        sb.append(RawContacts.SOURCE_ID + " IN (");
        for (int i = 0; i < segments.size(); i++) {
            LookupKeySegment segment = segments.get(i);
            if (segment.lookupType == ContactLookupKey.LOOKUP_TYPE_SOURCE_ID) {
                DatabaseUtils.appendEscapedSQLString(sb, segment.key);
                sb.append(",");
            }
        }
        sb.setLength(sb.length() - 1);      // Last comma
        sb.append(") AND " + RawContacts.CONTACT_ID + " NOT NULL");

        Cursor c = db.query(LookupBySourceIdQuery.TABLE, LookupBySourceIdQuery.COLUMNS,
                 sb.toString(), null, null, null, null);
        try {
            while (c.moveToNext()) {
                String accountTypeAndDataSet =
                        c.getString(LookupBySourceIdQuery.ACCOUNT_TYPE_AND_DATA_SET);
                String accountName = c.getString(LookupBySourceIdQuery.ACCOUNT_NAME);
                int accountHashCode =
                        ContactLookupKey.getAccountHashCode(accountTypeAndDataSet, accountName);
                String sourceId = c.getString(LookupBySourceIdQuery.SOURCE_ID);
                for (int i = 0; i < segments.size(); i++) {
                    LookupKeySegment segment = segments.get(i);
                    if (segment.lookupType == ContactLookupKey.LOOKUP_TYPE_SOURCE_ID
                            && accountHashCode == segment.accountHashCode
                            && segment.key.equals(sourceId)) {
                        segment.contactId = c.getLong(LookupBySourceIdQuery.CONTACT_ID);
                        break;
                    }
                }
            }
        } finally {
            c.close();
        }

        return getMostReferencedContactId(segments);
    }

    private interface LookupByRawContactIdQuery {
        String TABLE = Views.RAW_CONTACTS;

        String COLUMNS[] = {
                RawContacts.CONTACT_ID,
                RawContacts.ACCOUNT_TYPE_AND_DATA_SET,
                RawContacts.ACCOUNT_NAME,
                RawContacts._ID,
        };

        int CONTACT_ID = 0;
        int ACCOUNT_TYPE_AND_DATA_SET = 1;
        int ACCOUNT_NAME = 2;
        int ID = 3;
    }

    private long lookupContactIdByRawContactIds(SQLiteDatabase db,
            ArrayList<LookupKeySegment> segments) {
        StringBuilder sb = new StringBuilder();
        sb.append(RawContacts._ID + " IN (");
        for (int i = 0; i < segments.size(); i++) {
            LookupKeySegment segment = segments.get(i);
            if (segment.lookupType == ContactLookupKey.LOOKUP_TYPE_RAW_CONTACT_ID) {
                sb.append(segment.rawContactId);
                sb.append(",");
            }
        }
        sb.setLength(sb.length() - 1);      // Last comma
        sb.append(") AND " + RawContacts.CONTACT_ID + " NOT NULL");

        Cursor c = db.query(LookupByRawContactIdQuery.TABLE, LookupByRawContactIdQuery.COLUMNS,
                 sb.toString(), null, null, null, null);
        try {
            while (c.moveToNext()) {
                String accountTypeAndDataSet = c.getString(
                        LookupByRawContactIdQuery.ACCOUNT_TYPE_AND_DATA_SET);
                String accountName = c.getString(LookupByRawContactIdQuery.ACCOUNT_NAME);
                int accountHashCode =
                        ContactLookupKey.getAccountHashCode(accountTypeAndDataSet, accountName);
                String rawContactId = c.getString(LookupByRawContactIdQuery.ID);
                for (int i = 0; i < segments.size(); i++) {
                    LookupKeySegment segment = segments.get(i);
                    if (segment.lookupType == ContactLookupKey.LOOKUP_TYPE_RAW_CONTACT_ID
                            && accountHashCode == segment.accountHashCode
                            && segment.rawContactId.equals(rawContactId)) {
                        segment.contactId = c.getLong(LookupByRawContactIdQuery.CONTACT_ID);
                        break;
                    }
                }
            }
        } finally {
            c.close();
        }

        return getMostReferencedContactId(segments);
    }

    private interface LookupByDisplayNameQuery {
        String TABLE = Tables.NAME_LOOKUP_JOIN_RAW_CONTACTS;

        String COLUMNS[] = {
                RawContacts.CONTACT_ID,
                RawContacts.ACCOUNT_TYPE_AND_DATA_SET,
                RawContacts.ACCOUNT_NAME,
                NameLookupColumns.NORMALIZED_NAME
        };

        int CONTACT_ID = 0;
        int ACCOUNT_TYPE_AND_DATA_SET = 1;
        int ACCOUNT_NAME = 2;
        int NORMALIZED_NAME = 3;
    }

    private long lookupContactIdByDisplayNames(SQLiteDatabase db,
                ArrayList<LookupKeySegment> segments) {
        StringBuilder sb = new StringBuilder();
        sb.append(NameLookupColumns.NORMALIZED_NAME + " IN (");
        for (int i = 0; i < segments.size(); i++) {
            LookupKeySegment segment = segments.get(i);
            if (segment.lookupType == ContactLookupKey.LOOKUP_TYPE_DISPLAY_NAME
                    || segment.lookupType == ContactLookupKey.LOOKUP_TYPE_RAW_CONTACT_ID) {
                DatabaseUtils.appendEscapedSQLString(sb, segment.key);
                sb.append(",");
            }
        }
        sb.setLength(sb.length() - 1);      // Last comma
        sb.append(") AND " + NameLookupColumns.NAME_TYPE + "=" + NameLookupType.NAME_COLLATION_KEY
                + " AND " + RawContacts.CONTACT_ID + " NOT NULL");

        Cursor c = db.query(LookupByDisplayNameQuery.TABLE, LookupByDisplayNameQuery.COLUMNS,
                 sb.toString(), null, null, null, null);
        try {
            while (c.moveToNext()) {
                String accountTypeAndDataSet =
                        c.getString(LookupByDisplayNameQuery.ACCOUNT_TYPE_AND_DATA_SET);
                String accountName = c.getString(LookupByDisplayNameQuery.ACCOUNT_NAME);
                int accountHashCode =
                        ContactLookupKey.getAccountHashCode(accountTypeAndDataSet, accountName);
                String name = c.getString(LookupByDisplayNameQuery.NORMALIZED_NAME);
                for (int i = 0; i < segments.size(); i++) {
                    LookupKeySegment segment = segments.get(i);
                    if ((segment.lookupType == ContactLookupKey.LOOKUP_TYPE_DISPLAY_NAME
                            || segment.lookupType == ContactLookupKey.LOOKUP_TYPE_RAW_CONTACT_ID)
                            && accountHashCode == segment.accountHashCode
                            && segment.key.equals(name)) {
                        segment.contactId = c.getLong(LookupByDisplayNameQuery.CONTACT_ID);
                        break;
                    }
                }
            }
        } finally {
            c.close();
        }

        return getMostReferencedContactId(segments);
    }

    private boolean lookupKeyContainsType(ArrayList<LookupKeySegment> segments, int lookupType) {
        for (int i = 0; i < segments.size(); i++) {
            LookupKeySegment segment = segments.get(i);
            if (segment.lookupType == lookupType) {
                return true;
            }
        }

        return false;
    }

    /**
     * Returns the contact ID that is mentioned the highest number of times.
     */
    private long getMostReferencedContactId(ArrayList<LookupKeySegment> segments) {
        Collections.sort(segments);

        long bestContactId = -1;
        int bestRefCount = 0;

        long contactId = -1;
        int count = 0;

        int segmentCount = segments.size();
        for (int i = 0; i < segmentCount; i++) {
            LookupKeySegment segment = segments.get(i);
            if (segment.contactId != -1) {
                if (segment.contactId == contactId) {
                    count++;
                } else {
                    if (count > bestRefCount) {
                        bestContactId = contactId;
                        bestRefCount = count;
                    }
                    contactId = segment.contactId;
                    count = 1;
                }
            }
        }
        if (count > bestRefCount) {
            return contactId;
        } else {
            return bestContactId;
        }
    }

    private void setTablesAndProjectionMapForContacts(SQLiteQueryBuilder qb, Uri uri,
            String[] projection) {
        setTablesAndProjectionMapForContacts(qb, uri, projection, false);
    }

    /**
     * @param includeDataUsageStat true when the table should include DataUsageStat table.
     * Note that this uses INNER JOIN instead of LEFT OUTER JOIN, so some of data in Contacts
     * may be dropped.
     */
    private void setTablesAndProjectionMapForContacts(SQLiteQueryBuilder qb, Uri uri,
            String[] projection, boolean includeDataUsageStat) {
        StringBuilder sb = new StringBuilder();
        if (includeDataUsageStat) {
            sb.append(Views.DATA_USAGE_STAT + " AS " + Tables.DATA_USAGE_STAT);
            sb.append(" INNER JOIN ");
        }

        sb.append(Views.CONTACTS);

        // Just for frequently contacted contacts in Strequent Uri handling.
        if (includeDataUsageStat) {
            sb.append(" ON (" +
                    DbQueryUtils.concatenateClauses(
                            DataUsageStatColumns.CONCRETE_TIMES_USED + " > 0",
                            RawContacts.CONTACT_ID + "=" + Views.CONTACTS + "." + Contacts._ID) +
                    ")");
        }

        appendContactPresenceJoin(sb, projection, Contacts._ID);
        appendContactStatusUpdateJoin(sb, projection, ContactsColumns.LAST_STATUS_UPDATE_ID);
        qb.setTables(sb.toString());
        qb.setProjectionMap(sContactsProjectionMap);
    }

    /**
     * Finds name lookup records matching the supplied filter, picks one arbitrary match per
     * contact and joins that with other contacts tables.
     */
    private void setTablesAndProjectionMapForContactsWithSnippet(SQLiteQueryBuilder qb, Uri uri,
            String[] projection, String filter, long directoryId, boolean deferSnippeting) {

        StringBuilder sb = new StringBuilder();
        sb.append(Views.CONTACTS);

        if (filter != null) {
            filter = filter.trim();
        }

        if (TextUtils.isEmpty(filter) || (directoryId != -1 && directoryId != Directory.DEFAULT)) {
            sb.append(" JOIN (SELECT NULL AS " + SearchSnippetColumns.SNIPPET + " WHERE 0)");
        } else {
            appendSearchIndexJoin(sb, uri, projection, filter, deferSnippeting);
        }
        appendContactPresenceJoin(sb, projection, Contacts._ID);
        appendContactStatusUpdateJoin(sb, projection, ContactsColumns.LAST_STATUS_UPDATE_ID);
        qb.setTables(sb.toString());
        qb.setProjectionMap(sContactsProjectionWithSnippetMap);
    }

    private void appendSearchIndexJoin(
            StringBuilder sb, Uri uri, String[] projection, String filter,
            boolean  deferSnippeting) {

        if (snippetNeeded(projection)) {
            String[] args = null;
            String snippetArgs =
                    getQueryParameter(uri, SearchSnippetColumns.SNIPPET_ARGS_PARAM_KEY);
            if (snippetArgs != null) {
                args = snippetArgs.split(",");
            }

            String startMatch = args != null && args.length > 0 ? args[0]
                    : DEFAULT_SNIPPET_ARG_START_MATCH;
            String endMatch = args != null && args.length > 1 ? args[1]
                    : DEFAULT_SNIPPET_ARG_END_MATCH;
            String ellipsis = args != null && args.length > 2 ? args[2]
                    : DEFAULT_SNIPPET_ARG_ELLIPSIS;
            int maxTokens = args != null && args.length > 3 ? Integer.parseInt(args[3])
                    : DEFAULT_SNIPPET_ARG_MAX_TOKENS;

            appendSearchIndexJoin(
                    sb, filter, true, startMatch, endMatch, ellipsis, maxTokens,
                    deferSnippeting);
        } else {
            appendSearchIndexJoin(sb, filter, false, null, null, null, 0, false);
        }
    }

    public void appendSearchIndexJoin(StringBuilder sb, String filter,
            boolean snippetNeeded, String startMatch, String endMatch, String ellipsis,
            int maxTokens, boolean deferSnippeting) {
        boolean isEmailAddress = false;
        String emailAddress = null;
        boolean isPhoneNumber = false;
        String phoneNumber = null;
        String numberE164 = null;


        if (filter.indexOf('@') != -1) {
            emailAddress = mDbHelper.get().extractAddressFromEmailAddress(filter);
            isEmailAddress = !TextUtils.isEmpty(emailAddress);
        } else {
            isPhoneNumber = isPhoneNumber(filter);
            if (isPhoneNumber) {
                phoneNumber = PhoneNumberUtils.normalizeNumber(filter);
                numberE164 = PhoneNumberUtils.formatNumberToE164(phoneNumber,
                        mDbHelper.get().getCountryIso());
            }
        }

        final String SNIPPET_CONTACT_ID = "snippet_contact_id";
        sb.append(" JOIN (SELECT " + SearchIndexColumns.CONTACT_ID + " AS " + SNIPPET_CONTACT_ID);
        if (snippetNeeded) {
            sb.append(", ");
            if (isEmailAddress) {
                sb.append("ifnull(");
                if (!deferSnippeting) {
                    // Add the snippet marker only when we're really creating snippet.
                    DatabaseUtils.appendEscapedSQLString(sb, startMatch);
                    sb.append("||");
                }
                sb.append("(SELECT MIN(" + Email.ADDRESS + ")");
                sb.append(" FROM " + Tables.DATA_JOIN_RAW_CONTACTS);
                sb.append(" WHERE  " + Tables.SEARCH_INDEX + "." + SearchIndexColumns.CONTACT_ID);
                sb.append("=" + RawContacts.CONTACT_ID + " AND " + Email.ADDRESS + " LIKE ");
                DatabaseUtils.appendEscapedSQLString(sb, filter + "%");
                sb.append(")");
                if (!deferSnippeting) {
                    sb.append("||");
                    DatabaseUtils.appendEscapedSQLString(sb, endMatch);
                }
                sb.append(",");

                if (deferSnippeting) {
                    sb.append(SearchIndexColumns.CONTENT);
                } else {
                    appendSnippetFunction(sb, startMatch, endMatch, ellipsis, maxTokens);
                }
                sb.append(")");
            } else if (isPhoneNumber) {
                sb.append("ifnull(");
                if (!deferSnippeting) {
                    // Add the snippet marker only when we're really creating snippet.
                    DatabaseUtils.appendEscapedSQLString(sb, startMatch);
                    sb.append("||");
                }
                sb.append("(SELECT MIN(" + Phone.NUMBER + ")");
                sb.append(" FROM " +
                        Tables.DATA_JOIN_RAW_CONTACTS + " JOIN " + Tables.PHONE_LOOKUP);
                sb.append(" ON " + DataColumns.CONCRETE_ID);
                sb.append("=" + Tables.PHONE_LOOKUP + "." + PhoneLookupColumns.DATA_ID);
                sb.append(" WHERE  " + Tables.SEARCH_INDEX + "." + SearchIndexColumns.CONTACT_ID);
                sb.append("=" + RawContacts.CONTACT_ID);
                sb.append(" AND " + PhoneLookupColumns.NORMALIZED_NUMBER + " LIKE '");
                sb.append(phoneNumber);
                sb.append("%'");
                if (!TextUtils.isEmpty(numberE164)) {
                    sb.append(" OR " + PhoneLookupColumns.NORMALIZED_NUMBER + " LIKE '");
                    sb.append(numberE164);
                    sb.append("%'");
                }
                sb.append(")");
                if (! deferSnippeting) {
                    sb.append("||");
                    DatabaseUtils.appendEscapedSQLString(sb, endMatch);
                }
                sb.append(",");

                if (deferSnippeting) {
                    sb.append(SearchIndexColumns.CONTENT);
                } else {
                    appendSnippetFunction(sb, startMatch, endMatch, ellipsis, maxTokens);
                }
                sb.append(")");
            } else {
                final String normalizedFilter = NameNormalizer.normalize(filter);
                if (!TextUtils.isEmpty(normalizedFilter)) {
                    if (deferSnippeting) {
                        sb.append(SearchIndexColumns.CONTENT);
                    } else {
                        sb.append("(CASE WHEN EXISTS (SELECT 1 FROM ");
                        sb.append(Tables.RAW_CONTACTS + " AS rc INNER JOIN ");
                        sb.append(Tables.NAME_LOOKUP + " AS nl ON (rc." + RawContacts._ID);
                        sb.append("=nl." + NameLookupColumns.RAW_CONTACT_ID);
                        sb.append(") WHERE nl." + NameLookupColumns.NORMALIZED_NAME);
                        sb.append(" GLOB '" + normalizedFilter + "*' AND ");
                        sb.append("nl." + NameLookupColumns.NAME_TYPE + "=");
                        sb.append(NameLookupType.NAME_COLLATION_KEY + " AND ");
                        sb.append(Tables.SEARCH_INDEX + "." + SearchIndexColumns.CONTACT_ID);
                        sb.append("=rc." + RawContacts.CONTACT_ID);
                        sb.append(") THEN NULL ELSE ");
                        appendSnippetFunction(sb, startMatch, endMatch, ellipsis, maxTokens);
                        sb.append(" END)");
                    }
                } else {
                    sb.append("NULL");
                }
            }
            sb.append(" AS " + SearchSnippetColumns.SNIPPET);
        }

        sb.append(" FROM " + Tables.SEARCH_INDEX);
        sb.append(" WHERE ");
        sb.append(Tables.SEARCH_INDEX + " MATCH '");
        if (isEmailAddress) {
            // we know that the emailAddress contains a @. This phrase search should be
            // scoped against "content:" only, but unfortunately SQLite doesn't support
            // phrases and scoped columns at once. This is fine in this case however, because:
            //  - We can't erronously match against name, as name is all-hex (so the @ can't match)
            //  - We can't match against tokens, because phone-numbers can't contain @
            final String sanitizedEmailAddress =
                    emailAddress == null ? "" : sanitizeMatch(emailAddress);
            sb.append("\"");
            sb.append(sanitizedEmailAddress);
            sb.append("*\"");
        } else if (isPhoneNumber) {
            // normalized version of the phone number (phoneNumber can only have + and digits)
            final String phoneNumberCriteria = " OR tokens:" + phoneNumber + "*";

            // international version of this number (numberE164 can only have + and digits)
            final String numberE164Criteria =
                    (numberE164 != null && !TextUtils.equals(numberE164, phoneNumber))
                    ? " OR tokens:" + numberE164 + "*"
                    : "";

            // combine all criteria
            final String commonCriteria =
                    phoneNumberCriteria + numberE164Criteria;

            // search in content
            sb.append(SearchIndexManager.getFtsMatchQuery(filter,
                    FtsQueryBuilder.getDigitsQueryBuilder(commonCriteria)));
        } else {
            // general case: not a phone number, not an email-address
            sb.append(SearchIndexManager.getFtsMatchQuery(filter,
                    FtsQueryBuilder.SCOPED_NAME_NORMALIZING));
        }
        // Omit results in "Other Contacts".
        sb.append("' AND " + SNIPPET_CONTACT_ID + " IN " + Tables.DEFAULT_DIRECTORY + ")");
        sb.append(" ON (" + Contacts._ID + "=" + SNIPPET_CONTACT_ID + ")");
    }

    private static String sanitizeMatch(String filter) {
        return filter.replace("'", "").replace("*", "").replace("-", "").replace("\"", "");
    }

    private void appendSnippetFunction(
            StringBuilder sb, String startMatch, String endMatch, String ellipsis, int maxTokens) {
        sb.append("snippet(" + Tables.SEARCH_INDEX + ",");
        DatabaseUtils.appendEscapedSQLString(sb, startMatch);
        sb.append(",");
        DatabaseUtils.appendEscapedSQLString(sb, endMatch);
        sb.append(",");
        DatabaseUtils.appendEscapedSQLString(sb, ellipsis);

        // The index of the column used for the snippet, "content"
        sb.append(",1,");
        sb.append(maxTokens);
        sb.append(")");
    }

    private void setTablesAndProjectionMapForRawContacts(SQLiteQueryBuilder qb, Uri uri) {
        StringBuilder sb = new StringBuilder();
        sb.append(Views.RAW_CONTACTS);
        qb.setTables(sb.toString());
        qb.setProjectionMap(sRawContactsProjectionMap);
        appendAccountIdFromParameter(qb, uri);
    }

    private void setTablesAndProjectionMapForRawEntities(SQLiteQueryBuilder qb, Uri uri) {
        qb.setTables(Views.RAW_ENTITIES);
        qb.setProjectionMap(sRawEntityProjectionMap);
        appendAccountIdFromParameter(qb, uri);
    }

    private void setTablesAndProjectionMapForData(SQLiteQueryBuilder qb, Uri uri,
            String[] projection, boolean distinct) {
        setTablesAndProjectionMapForData(qb, uri, projection, distinct, false, null);
    }

    private void setTablesAndProjectionMapForData(SQLiteQueryBuilder qb, Uri uri,
            String[] projection, boolean distinct, boolean addSipLookupColumns) {
        setTablesAndProjectionMapForData(qb, uri, projection, distinct, addSipLookupColumns, null);
    }

    /**
     * @param usageType when non-null {@link Tables#DATA_USAGE_STAT} is joined with the specified
     * type.
     */
    private void setTablesAndProjectionMapForData(SQLiteQueryBuilder qb, Uri uri,
            String[] projection, boolean distinct, Integer usageType) {
        setTablesAndProjectionMapForData(qb, uri, projection, distinct, false, usageType);
    }

    private void setTablesAndProjectionMapForData(SQLiteQueryBuilder qb, Uri uri,
            String[] projection, boolean distinct, boolean addSipLookupColumns, Integer usageType) {
        StringBuilder sb = new StringBuilder();
        sb.append(Views.DATA);
        sb.append(" data");

        appendContactPresenceJoin(sb, projection, RawContacts.CONTACT_ID);
        appendContactStatusUpdateJoin(sb, projection, ContactsColumns.LAST_STATUS_UPDATE_ID);
        appendDataPresenceJoin(sb, projection, DataColumns.CONCRETE_ID);
        appendDataStatusUpdateJoin(sb, projection, DataColumns.CONCRETE_ID);

        if (usageType != null) {
            appendDataUsageStatJoin(sb, usageType, DataColumns.CONCRETE_ID);
        }

        qb.setTables(sb.toString());

        boolean useDistinct = distinct
                || !mDbHelper.get().isInProjection(projection, DISTINCT_DATA_PROHIBITING_COLUMNS);
        qb.setDistinct(useDistinct);

        final ProjectionMap projectionMap;
        if (addSipLookupColumns) {
            projectionMap = useDistinct
                    ? sDistinctDataSipLookupProjectionMap : sDataSipLookupProjectionMap;
        } else {
            projectionMap = useDistinct ? sDistinctDataProjectionMap : sDataProjectionMap;
        }

        qb.setProjectionMap(projectionMap);
        appendAccountIdFromParameter(qb, uri);
    }

    private void setTableAndProjectionMapForStatusUpdates(SQLiteQueryBuilder qb,
            String[] projection) {
        StringBuilder sb = new StringBuilder();
        sb.append(Views.DATA);
        sb.append(" data");
        appendDataPresenceJoin(sb, projection, DataColumns.CONCRETE_ID);
        appendDataStatusUpdateJoin(sb, projection, DataColumns.CONCRETE_ID);

        qb.setTables(sb.toString());
        qb.setProjectionMap(sStatusUpdatesProjectionMap);
    }

    private void setTablesAndProjectionMapForStreamItems(SQLiteQueryBuilder qb) {
        qb.setTables(Views.STREAM_ITEMS);
        qb.setProjectionMap(sStreamItemsProjectionMap);
    }

    private void setTablesAndProjectionMapForStreamItemPhotos(SQLiteQueryBuilder qb) {
        qb.setTables(Tables.PHOTO_FILES
                + " JOIN " + Tables.STREAM_ITEM_PHOTOS + " ON ("
                + StreamItemPhotosColumns.CONCRETE_PHOTO_FILE_ID + "="
                + PhotoFilesColumns.CONCRETE_ID
                + ") JOIN " + Tables.STREAM_ITEMS + " ON ("
                + StreamItemPhotosColumns.CONCRETE_STREAM_ITEM_ID + "="
                + StreamItemsColumns.CONCRETE_ID + ")"
                + " JOIN " + Tables.RAW_CONTACTS + " ON ("
                + StreamItemsColumns.CONCRETE_RAW_CONTACT_ID + "=" + RawContactsColumns.CONCRETE_ID
                + ")");
        qb.setProjectionMap(sStreamItemPhotosProjectionMap);
    }

    private void setTablesAndProjectionMapForEntities(SQLiteQueryBuilder qb, Uri uri,
            String[] projection) {
        StringBuilder sb = new StringBuilder();
        sb.append(Views.ENTITIES);
        sb.append(" data");

        appendContactPresenceJoin(sb, projection, Contacts.Entity.CONTACT_ID);
        appendContactStatusUpdateJoin(sb, projection, ContactsColumns.LAST_STATUS_UPDATE_ID);
        appendDataPresenceJoin(sb, projection, Contacts.Entity.DATA_ID);
        appendDataStatusUpdateJoin(sb, projection, Contacts.Entity.DATA_ID);

        qb.setTables(sb.toString());
        qb.setProjectionMap(sEntityProjectionMap);
        appendAccountIdFromParameter(qb, uri);
    }

    private void appendContactStatusUpdateJoin(StringBuilder sb, String[] projection,
            String lastStatusUpdateIdColumn) {
        if (mDbHelper.get().isInProjection(projection,
                Contacts.CONTACT_STATUS,
                Contacts.CONTACT_STATUS_RES_PACKAGE,
                Contacts.CONTACT_STATUS_ICON,
                Contacts.CONTACT_STATUS_LABEL,
                Contacts.CONTACT_STATUS_TIMESTAMP)) {
            sb.append(" LEFT OUTER JOIN " + Tables.STATUS_UPDATES + " "
                    + ContactsStatusUpdatesColumns.ALIAS +
                    " ON (" + lastStatusUpdateIdColumn + "="
                            + ContactsStatusUpdatesColumns.CONCRETE_DATA_ID + ")");
        }
    }

    private void appendDataStatusUpdateJoin(StringBuilder sb, String[] projection,
            String dataIdColumn) {
        if (mDbHelper.get().isInProjection(projection,
                StatusUpdates.STATUS,
                StatusUpdates.STATUS_RES_PACKAGE,
                StatusUpdates.STATUS_ICON,
                StatusUpdates.STATUS_LABEL,
                StatusUpdates.STATUS_TIMESTAMP)) {
            sb.append(" LEFT OUTER JOIN " + Tables.STATUS_UPDATES +
                    " ON (" + StatusUpdatesColumns.CONCRETE_DATA_ID + "="
                            + dataIdColumn + ")");
        }
    }

    private void appendDataUsageStatJoin(StringBuilder sb, int usageType, String dataIdColumn) {
        sb.append(" LEFT OUTER JOIN " + Tables.DATA_USAGE_STAT +
                " ON (" + DataUsageStatColumns.CONCRETE_DATA_ID + "=" + dataIdColumn +
                " AND " + DataUsageStatColumns.CONCRETE_USAGE_TYPE + "=" + usageType + ")");
    }

    private void appendContactPresenceJoin(StringBuilder sb, String[] projection,
            String contactIdColumn) {
        if (mDbHelper.get().isInProjection(projection,
                Contacts.CONTACT_PRESENCE, Contacts.CONTACT_CHAT_CAPABILITY)) {
            sb.append(" LEFT OUTER JOIN " + Tables.AGGREGATED_PRESENCE +
                    " ON (" + contactIdColumn + " = "
                            + AggregatedPresenceColumns.CONCRETE_CONTACT_ID + ")");
        }
    }

    private void appendDataPresenceJoin(StringBuilder sb, String[] projection,
            String dataIdColumn) {
        if (mDbHelper.get().isInProjection(projection, Data.PRESENCE, Data.CHAT_CAPABILITY)) {
            sb.append(" LEFT OUTER JOIN " + Tables.PRESENCE +
                    " ON (" + StatusUpdates.DATA_ID + "=" + dataIdColumn + ")");
        }
    }

    private void appendLocalDirectoryAndAccountSelectionIfNeeded(SQLiteQueryBuilder qb,
            long directoryId, Uri uri) {
        final StringBuilder sb = new StringBuilder();
        if (directoryId == Directory.DEFAULT) {
            sb.append("(" + Contacts._ID + " IN " + Tables.DEFAULT_DIRECTORY + ")");
        } else if (directoryId == Directory.LOCAL_INVISIBLE){
            sb.append("(" + Contacts._ID + " NOT IN " + Tables.DEFAULT_DIRECTORY + ")");
        } else {
            sb.append("(1)");
        }

        final AccountWithDataSet accountWithDataSet = getAccountWithDataSetFromUri(uri);
        // Accounts are valid by only checking one parameter, since we've
        // already ruled out partial accounts.
        final boolean validAccount = !TextUtils.isEmpty(accountWithDataSet.getAccountName());
        if (validAccount) {
            final Long accountId = mDbHelper.get().getAccountIdOrNull(accountWithDataSet);
            if (accountId == null) {
                // No such account.
                sb.setLength(0);
                sb.append("(1=2)");
            } else {
                sb.append(
                        " AND (" + Contacts._ID + " IN (" +
                        "SELECT " + RawContacts.CONTACT_ID + " FROM " + Tables.RAW_CONTACTS +
                        " WHERE " + RawContactsColumns.ACCOUNT_ID + "=" + accountId.toString() +
                        "))");
            }
        }
        qb.appendWhere(sb.toString());
    }

    private void appendAccountFromParameter(SQLiteQueryBuilder qb, Uri uri) {
        final AccountWithDataSet accountWithDataSet = getAccountWithDataSetFromUri(uri);

        // Accounts are valid by only checking one parameter, since we've
        // already ruled out partial accounts.
        final boolean validAccount = !TextUtils.isEmpty(accountWithDataSet.getAccountName());
        if (validAccount) {
            String toAppend = "(" + RawContacts.ACCOUNT_NAME + "="
                    + DatabaseUtils.sqlEscapeString(accountWithDataSet.getAccountName()) + " AND "
                    + RawContacts.ACCOUNT_TYPE + "="
                    + DatabaseUtils.sqlEscapeString(accountWithDataSet.getAccountType());
            if (accountWithDataSet.getDataSet() == null) {
                toAppend += " AND " + RawContacts.DATA_SET + " IS NULL";
            } else {
                toAppend += " AND " + RawContacts.DATA_SET + "=" +
                        DatabaseUtils.sqlEscapeString(accountWithDataSet.getDataSet());
            }
            toAppend += ")";
            qb.appendWhere(toAppend);
        } else {
            qb.appendWhere("1");
        }
    }

    private void appendAccountIdFromParameter(SQLiteQueryBuilder qb, Uri uri) {
        final AccountWithDataSet accountWithDataSet = getAccountWithDataSetFromUri(uri);

        // Accounts are valid by only checking one parameter, since we've
        // already ruled out partial accounts.
        final boolean validAccount = !TextUtils.isEmpty(accountWithDataSet.getAccountName());
        if (validAccount) {
            final Long accountId = mDbHelper.get().getAccountIdOrNull(accountWithDataSet);
            if (accountId == null) {
                // No such account.
                qb.appendWhere("(1=2)");
            } else {
                qb.appendWhere(
                        "(" + RawContactsColumns.ACCOUNT_ID + "=" + accountId.toString() + ")");
            }
        } else {
            qb.appendWhere("1");
        }
    }

    private AccountWithDataSet getAccountWithDataSetFromUri(Uri uri) {
        final String accountName = getQueryParameter(uri, RawContacts.ACCOUNT_NAME);
        final String accountType = getQueryParameter(uri, RawContacts.ACCOUNT_TYPE);
        final String dataSet = getQueryParameter(uri, RawContacts.DATA_SET);

        final boolean partialUri = TextUtils.isEmpty(accountName) ^ TextUtils.isEmpty(accountType);
        if (partialUri) {
            // Throw when either account is incomplete
            throw new IllegalArgumentException(mDbHelper.get().exceptionMessage(
                    "Must specify both or neither of ACCOUNT_NAME and ACCOUNT_TYPE", uri));
        }
        return AccountWithDataSet.get(accountName, accountType, dataSet);
    }

    private String appendAccountToSelection(Uri uri, String selection) {
        final AccountWithDataSet accountWithDataSet = getAccountWithDataSetFromUri(uri);

        // Accounts are valid by only checking one parameter, since we've
        // already ruled out partial accounts.
        final boolean validAccount = !TextUtils.isEmpty(accountWithDataSet.getAccountName());
        if (validAccount) {
            StringBuilder selectionSb = new StringBuilder(RawContacts.ACCOUNT_NAME + "=");
            selectionSb.append(DatabaseUtils.sqlEscapeString(accountWithDataSet.getAccountName()));
            selectionSb.append(" AND " + RawContacts.ACCOUNT_TYPE + "=");
            selectionSb.append(DatabaseUtils.sqlEscapeString(accountWithDataSet.getAccountType()));
            if (accountWithDataSet.getDataSet() == null) {
                selectionSb.append(" AND " + RawContacts.DATA_SET + " IS NULL");
            } else {
                selectionSb.append(" AND " + RawContacts.DATA_SET + "=")
                        .append(DatabaseUtils.sqlEscapeString(accountWithDataSet.getDataSet()));
            }
            if (!TextUtils.isEmpty(selection)) {
                selectionSb.append(" AND (");
                selectionSb.append(selection);
                selectionSb.append(')');
            }
            return selectionSb.toString();
        } else {
            return selection;
        }
    }

    private String appendAccountIdToSelection(Uri uri, String selection) {
        final AccountWithDataSet accountWithDataSet = getAccountWithDataSetFromUri(uri);

        // Accounts are valid by only checking one parameter, since we've
        // already ruled out partial accounts.
        final boolean validAccount = !TextUtils.isEmpty(accountWithDataSet.getAccountName());
        if (validAccount) {
            final StringBuilder selectionSb = new StringBuilder();

            final Long accountId = mDbHelper.get().getAccountIdOrNull(accountWithDataSet);
            if (accountId == null) {
                // No such account in the accounts table.  This means, there's no rows to be
                // selected.
                // Note even in this case, we still need to append the original selection, because
                // it may have query parameters.  If we remove these we'll get the # of parameters
                // mismatch exception.
                selectionSb.append("(1=2)");
            } else {
                selectionSb.append(RawContactsColumns.ACCOUNT_ID + "=");
                selectionSb.append(Long.toString(accountId));
            }

            if (!TextUtils.isEmpty(selection)) {
                selectionSb.append(" AND (");
                selectionSb.append(selection);
                selectionSb.append(')');
            }
            return selectionSb.toString();
        } else {
            return selection;
        }
    }

    /**
     * Gets the value of the "limit" URI query parameter.
     *
     * @return A string containing a non-negative integer, or <code>null</code> if
     *         the parameter is not set, or is set to an invalid value.
     */
    private String getLimit(Uri uri) {
        String limitParam = getQueryParameter(uri, ContactsContract.LIMIT_PARAM_KEY);
        if (limitParam == null) {
            return null;
        }
        // make sure that the limit is a non-negative integer
        try {
            int l = Integer.parseInt(limitParam);
            if (l < 0) {
                Log.w(TAG, "Invalid limit parameter: " + limitParam);
                return null;
            }
            return String.valueOf(l);
        } catch (NumberFormatException ex) {
            Log.w(TAG, "Invalid limit parameter: " + limitParam);
            return null;
        }
    }

    @Override
    public AssetFileDescriptor openAssetFile(Uri uri, String mode) throws FileNotFoundException {
        boolean success = false;
        try {
            if (mode.equals("r")) {
                waitForAccess(mReadAccessLatch);
            } else {
                waitForAccess(mWriteAccessLatch);
            }
            final AssetFileDescriptor ret;
            if (mapsToProfileDb(uri)) {
                switchToProfileMode();
                ret = mProfileProvider.openAssetFile(uri, mode);
            } else {
                switchToContactMode();
                ret = openAssetFileLocal(uri, mode);
            }
            success = true;
            return ret;
        } finally {
            if (VERBOSE_LOGGING) {
                Log.v(TAG, "openAssetFile uri=" + uri + " mode=" + mode + " success=" + success);
            }
        }
    }

    public AssetFileDescriptor openAssetFileLocal(Uri uri, String mode)
            throws FileNotFoundException {

        // Default active DB to the contacts DB if none has been set.
        if (mActiveDb.get() == null) {
            if (mode.equals("r")) {
                mActiveDb.set(mContactsHelper.getReadableDatabase());
            } else {
                mActiveDb.set(mContactsHelper.getWritableDatabase());
            }
        }

        int match = sUriMatcher.match(uri);
        switch (match) {
            case CONTACTS_ID_PHOTO: {
                long contactId = Long.parseLong(uri.getPathSegments().get(1));
                return openPhotoAssetFile(mActiveDb.get(), uri, mode,
                        Data._ID + "=" + Contacts.PHOTO_ID + " AND " +
                                RawContacts.CONTACT_ID + "=?",
                        new String[]{String.valueOf(contactId)});
            }

            case CONTACTS_ID_DISPLAY_PHOTO: {
                if (!mode.equals("r")) {
                    throw new IllegalArgumentException(
                            "Display photos retrieved by contact ID can only be read.");
                }
                long contactId = Long.parseLong(uri.getPathSegments().get(1));
                Cursor c = mActiveDb.get().query(Tables.CONTACTS,
                        new String[]{Contacts.PHOTO_FILE_ID},
                        Contacts._ID + "=?", new String[]{String.valueOf(contactId)},
                        null, null, null);
                try {
                    if (c.moveToFirst()) {
                        long photoFileId = c.getLong(0);
                        return openDisplayPhotoForRead(photoFileId);
                    } else {
                        // No contact for this ID.
                        throw new FileNotFoundException(uri.toString());
                    }
                } finally {
                    c.close();
                }
            }

            case PROFILE_DISPLAY_PHOTO: {
                if (!mode.equals("r")) {
                    throw new IllegalArgumentException(
                            "Display photos retrieved by contact ID can only be read.");
                }
                Cursor c = mActiveDb.get().query(Tables.CONTACTS,
                        new String[]{Contacts.PHOTO_FILE_ID}, null, null, null, null, null);
                try {
                    if (c.moveToFirst()) {
                        long photoFileId = c.getLong(0);
                        return openDisplayPhotoForRead(photoFileId);
                    } else {
                        // No profile record.
                        throw new FileNotFoundException(uri.toString());
                    }
                } finally {
                    c.close();
                }
            }

            case CONTACTS_LOOKUP_PHOTO:
            case CONTACTS_LOOKUP_ID_PHOTO:
            case CONTACTS_LOOKUP_DISPLAY_PHOTO:
            case CONTACTS_LOOKUP_ID_DISPLAY_PHOTO: {
                if (!mode.equals("r")) {
                    throw new IllegalArgumentException(
                            "Photos retrieved by contact lookup key can only be read.");
                }
                List<String> pathSegments = uri.getPathSegments();
                int segmentCount = pathSegments.size();
                if (segmentCount < 4) {
                    throw new IllegalArgumentException(mDbHelper.get().exceptionMessage(
                            "Missing a lookup key", uri));
                }

                boolean forDisplayPhoto = (match == CONTACTS_LOOKUP_ID_DISPLAY_PHOTO
                        || match == CONTACTS_LOOKUP_DISPLAY_PHOTO);
                String lookupKey = pathSegments.get(2);
                String[] projection = new String[]{Contacts.PHOTO_ID, Contacts.PHOTO_FILE_ID};
                if (segmentCount == 5) {
                    long contactId = Long.parseLong(pathSegments.get(3));
                    SQLiteQueryBuilder lookupQb = new SQLiteQueryBuilder();
                    setTablesAndProjectionMapForContacts(lookupQb, uri, projection);
                    Cursor c = queryWithContactIdAndLookupKey(lookupQb, mActiveDb.get(), uri,
                            projection, null, null, null, null, null,
                            Contacts._ID, contactId, Contacts.LOOKUP_KEY, lookupKey, null);
                    if (c != null) {
                        try {
                            c.moveToFirst();
                            if (forDisplayPhoto) {
                                long photoFileId =
                                        c.getLong(c.getColumnIndex(Contacts.PHOTO_FILE_ID));
                                return openDisplayPhotoForRead(photoFileId);
                            } else {
                                long photoId = c.getLong(c.getColumnIndex(Contacts.PHOTO_ID));
                                return openPhotoAssetFile(mActiveDb.get(), uri, mode,
                                        Data._ID + "=?", new String[]{String.valueOf(photoId)});
                            }
                        } finally {
                            c.close();
                        }
                    }
                }

                SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
                setTablesAndProjectionMapForContacts(qb, uri, projection);
                long contactId = lookupContactIdByLookupKey(mActiveDb.get(), lookupKey);
                Cursor c = qb.query(mActiveDb.get(), projection, Contacts._ID + "=?",
                        new String[]{String.valueOf(contactId)}, null, null, null);
                try {
                    c.moveToFirst();
                    if (forDisplayPhoto) {
                        long photoFileId = c.getLong(c.getColumnIndex(Contacts.PHOTO_FILE_ID));
                        return openDisplayPhotoForRead(photoFileId);
                    } else {
                        long photoId = c.getLong(c.getColumnIndex(Contacts.PHOTO_ID));
                        return openPhotoAssetFile(mActiveDb.get(), uri, mode,
                                Data._ID + "=?", new String[]{String.valueOf(photoId)});
                    }
                } finally {
                    c.close();
                }
            }

            case RAW_CONTACTS_ID_DISPLAY_PHOTO: {
                long rawContactId = Long.parseLong(uri.getPathSegments().get(1));
                boolean writeable = !mode.equals("r");

                // Find the primary photo data record for this raw contact.
                SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
                String[] projection = new String[]{Data._ID, Photo.PHOTO_FILE_ID};
                setTablesAndProjectionMapForData(qb, uri, projection, false);
                long photoMimetypeId = mDbHelper.get().getMimeTypeId(Photo.CONTENT_ITEM_TYPE);
                Cursor c = qb.query(mActiveDb.get(), projection,
                        Data.RAW_CONTACT_ID + "=? AND " + DataColumns.MIMETYPE_ID + "=?",
                        new String[]{String.valueOf(rawContactId), String.valueOf(photoMimetypeId)},
                        null, null, Data.IS_PRIMARY + " DESC");
                long dataId = 0;
                long photoFileId = 0;
                try {
                    if (c.getCount() >= 1) {
                        c.moveToFirst();
                        dataId = c.getLong(0);
                        photoFileId = c.getLong(1);
                    }
                } finally {
                    c.close();
                }

                // If writeable, open a writeable file descriptor that we can monitor.
                // When the caller finishes writing content, we'll process the photo and
                // update the data record.
                if (writeable) {
                    return openDisplayPhotoForWrite(rawContactId, dataId, uri, mode);
                } else {
                    return openDisplayPhotoForRead(photoFileId);
                }
            }

            case DISPLAY_PHOTO_ID: {
                long photoFileId = ContentUris.parseId(uri);
                if (!mode.equals("r")) {
                    throw new IllegalArgumentException(
                            "Display photos retrieved by key can only be read.");
                }
                return openDisplayPhotoForRead(photoFileId);
            }

            case DATA_ID: {
                long dataId = Long.parseLong(uri.getPathSegments().get(1));
                long photoMimetypeId = mDbHelper.get().getMimeTypeId(Photo.CONTENT_ITEM_TYPE);
                return openPhotoAssetFile(mActiveDb.get(), uri, mode,
                        Data._ID + "=? AND " + DataColumns.MIMETYPE_ID + "=" + photoMimetypeId,
                        new String[]{String.valueOf(dataId)});
            }

            case PROFILE_AS_VCARD: {
                // When opening a contact as file, we pass back contents as a
                // vCard-encoded stream. We build into a local buffer first,
                // then pipe into MemoryFile once the exact size is known.
                final ByteArrayOutputStream localStream = new ByteArrayOutputStream();
                outputRawContactsAsVCard(uri, localStream, null, null);
                return buildAssetFileDescriptor(localStream);
            }

            case CONTACTS_AS_VCARD: {
                // When opening a contact as file, we pass back contents as a
                // vCard-encoded stream. We build into a local buffer first,
                // then pipe into MemoryFile once the exact size is known.
                final ByteArrayOutputStream localStream = new ByteArrayOutputStream();
                outputRawContactsAsVCard(uri, localStream, null, null);
                return buildAssetFileDescriptor(localStream);
            }

            case CONTACTS_AS_MULTI_VCARD: {
                final String lookupKeys = uri.getPathSegments().get(2);
                final String[] loopupKeyList = lookupKeys.split(":");
                final StringBuilder inBuilder = new StringBuilder();
                Uri queryUri = Contacts.CONTENT_URI;
                int index = 0;

                // SQLite has limits on how many parameters can be used
                // so the IDs are concatenated to a query string here instead
                for (String lookupKey : loopupKeyList) {
                    if (index == 0) {
                        inBuilder.append("(");
                    } else {
                        inBuilder.append(",");
                    }
                    // TODO: Figure out what to do if the profile contact is in the list.
                    long contactId = lookupContactIdByLookupKey(mActiveDb.get(), lookupKey);
                    inBuilder.append(contactId);
                    index++;
                }
                inBuilder.append(')');
                final String selection = Contacts._ID + " IN " + inBuilder.toString();

                // When opening a contact as file, we pass back contents as a
                // vCard-encoded stream. We build into a local buffer first,
                // then pipe into MemoryFile once the exact size is known.
                final ByteArrayOutputStream localStream = new ByteArrayOutputStream();
                outputRawContactsAsVCard(queryUri, localStream, selection, null);
                return buildAssetFileDescriptor(localStream);
            }

            default:
                throw new FileNotFoundException(mDbHelper.get().exceptionMessage(
                        "File does not exist", uri));
        }
    }

    private AssetFileDescriptor openPhotoAssetFile(SQLiteDatabase db, Uri uri, String mode,
            String selection, String[] selectionArgs)
            throws FileNotFoundException {
        if (!"r".equals(mode)) {
            throw new FileNotFoundException(mDbHelper.get().exceptionMessage("Mode " + mode
                    + " not supported.", uri));
        }

        String sql =
                "SELECT " + Photo.PHOTO + " FROM " + Views.DATA +
                " WHERE " + selection;
        try {
            return makeAssetFileDescriptor(
                    DatabaseUtils.blobFileDescriptorForQuery(db, sql, selectionArgs));
        } catch (SQLiteDoneException e) {
            // this will happen if the DB query returns no rows (i.e. contact does not exist)
            throw new FileNotFoundException(uri.toString());
        }
    }

    /**
     * Opens a display photo from the photo store for reading.
     * @param photoFileId The display photo file ID
     * @return An asset file descriptor that allows the file to be read.
     * @throws FileNotFoundException If no photo file for the given ID exists.
     */
    private AssetFileDescriptor openDisplayPhotoForRead(long photoFileId)
            throws FileNotFoundException {
        PhotoStore.Entry entry = mPhotoStore.get().get(photoFileId);
        if (entry != null) {
            try {
                return makeAssetFileDescriptor(
                        ParcelFileDescriptor.open(new File(entry.path),
                                ParcelFileDescriptor.MODE_READ_ONLY),
                        entry.size);
            } catch (FileNotFoundException fnfe) {
                scheduleBackgroundTask(BACKGROUND_TASK_CLEANUP_PHOTOS);
                throw fnfe;
            }
        } else {
            scheduleBackgroundTask(BACKGROUND_TASK_CLEANUP_PHOTOS);
            throw new FileNotFoundException("No photo file found for ID " + photoFileId);
        }
    }

    /**
     * Opens a file descriptor for a photo to be written.  When the caller completes writing
     * to the file (closing the output stream), the image will be parsed out and processed.
     * If processing succeeds, the given raw contact ID's primary photo record will be
     * populated with the inserted image (if no primary photo record exists, the data ID can
     * be left as 0, and a new data record will be inserted).
     * @param rawContactId Raw contact ID this photo entry should be associated with.
     * @param dataId Data ID for a photo mimetype that will be updated with the inserted
     *     image.  May be set to 0, in which case the inserted image will trigger creation
     *     of a new primary photo image data row for the raw contact.
     * @param uri The URI being used to access this file.
     * @param mode Read/write mode string.
     * @return An asset file descriptor the caller can use to write an image file for the
     *     raw contact.
     */
    private AssetFileDescriptor openDisplayPhotoForWrite(long rawContactId, long dataId, Uri uri,
            String mode) {
        try {
            ParcelFileDescriptor[] pipeFds = ParcelFileDescriptor.createPipe();
            PipeMonitor pipeMonitor = new PipeMonitor(rawContactId, dataId, pipeFds[0]);
            pipeMonitor.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Object[]) null);
            return new AssetFileDescriptor(pipeFds[1], 0, AssetFileDescriptor.UNKNOWN_LENGTH);
        } catch (IOException ioe) {
            Log.e(TAG, "Could not create temp image file in mode " + mode);
            return null;
        }
    }

    /**
     * Async task that monitors the given file descriptor (the read end of a pipe) for
     * the writer finishing.  If the data from the pipe contains a valid image, the image
     * is either inserted into the given raw contact or updated in the given data row.
     */
    private class PipeMonitor extends AsyncTask<Object, Object, Object> {
        private final ParcelFileDescriptor mDescriptor;
        private final long mRawContactId;
        private final long mDataId;
        private PipeMonitor(long rawContactId, long dataId, ParcelFileDescriptor descriptor) {
            mRawContactId = rawContactId;
            mDataId = dataId;
            mDescriptor = descriptor;
        }

        @Override
        protected Object doInBackground(Object... params) {
            AutoCloseInputStream is = new AutoCloseInputStream(mDescriptor);
            try {
                Bitmap b = BitmapFactory.decodeStream(is);
                if (b != null) {
                    waitForAccess(mWriteAccessLatch);
                    PhotoProcessor processor = new PhotoProcessor(b, getMaxDisplayPhotoDim(),
                            getMaxThumbnailDim());

                    // Store the compressed photo in the photo store.
                    PhotoStore photoStore = ContactsContract.isProfileId(mRawContactId)
                            ? mProfilePhotoStore
                            : mContactsPhotoStore;
                    long photoFileId = photoStore.insert(processor);

                    // Depending on whether we already had a data row to attach the photo
                    // to, do an update or insert.
                    if (mDataId != 0) {
                        // Update the data record with the new photo.
                        ContentValues updateValues = new ContentValues();

                        // Signal that photo processing has already been handled.
                        updateValues.put(DataRowHandlerForPhoto.SKIP_PROCESSING_KEY, true);

                        if (photoFileId != 0) {
                            updateValues.put(Photo.PHOTO_FILE_ID, photoFileId);
                        }
                        updateValues.put(Photo.PHOTO, processor.getThumbnailPhotoBytes());
                        update(ContentUris.withAppendedId(Data.CONTENT_URI, mDataId),
                                updateValues, null, null);
                    } else {
                        // Insert a new primary data record with the photo.
                        ContentValues insertValues = new ContentValues();

                        // Signal that photo processing has already been handled.
                        insertValues.put(DataRowHandlerForPhoto.SKIP_PROCESSING_KEY, true);

                        insertValues.put(Data.MIMETYPE, Photo.CONTENT_ITEM_TYPE);
                        insertValues.put(Data.IS_PRIMARY, 1);
                        if (photoFileId != 0) {
                            insertValues.put(Photo.PHOTO_FILE_ID, photoFileId);
                        }
                        insertValues.put(Photo.PHOTO, processor.getThumbnailPhotoBytes());
                        insert(RawContacts.CONTENT_URI.buildUpon()
                                .appendPath(String.valueOf(mRawContactId))
                                .appendPath(RawContacts.Data.CONTENT_DIRECTORY).build(),
                                insertValues);
                    }

                }
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
            return null;
        }
    }

    private static final String CONTACT_MEMORY_FILE_NAME = "contactAssetFile";

    /**
     * Returns an {@link AssetFileDescriptor} backed by the
     * contents of the given {@link ByteArrayOutputStream}.
     */
    private AssetFileDescriptor buildAssetFileDescriptor(ByteArrayOutputStream stream) {
        try {
            stream.flush();

            final byte[] byteData = stream.toByteArray();

            return makeAssetFileDescriptor(
                    ParcelFileDescriptor.fromData(byteData, CONTACT_MEMORY_FILE_NAME),
                    byteData.length);
        } catch (IOException e) {
            Log.w(TAG, "Problem writing stream into an ParcelFileDescriptor: " + e.toString());
            return null;
        }
    }

    private AssetFileDescriptor makeAssetFileDescriptor(ParcelFileDescriptor fd) {
        return makeAssetFileDescriptor(fd, AssetFileDescriptor.UNKNOWN_LENGTH);
    }

    private AssetFileDescriptor makeAssetFileDescriptor(ParcelFileDescriptor fd, long length) {
        return fd != null ? new AssetFileDescriptor(fd, 0, length) : null;
    }

    /**
     * Output {@link RawContacts} matching the requested selection in the vCard
     * format to the given {@link OutputStream}. This method returns silently if
     * any errors encountered.
     */
    private void outputRawContactsAsVCard(Uri uri, OutputStream stream,
            String selection, String[] selectionArgs) {
        final Context context = this.getContext();
        int vcardconfig = VCardConfig.VCARD_TYPE_DEFAULT;
        if(uri.getBooleanQueryParameter(
                Contacts.QUERY_PARAMETER_VCARD_NO_PHOTO, false)) {
            vcardconfig |= VCardConfig.FLAG_REFRAIN_IMAGE_EXPORT;
        }
        final VCardComposer composer =
                new VCardComposer(context, vcardconfig, false);
        Writer writer = null;
        final Uri rawContactsUri;
        if (mapsToProfileDb(uri)) {
            // Pre-authorize the URI, since the caller would have already gone through the
            // permission check to get here, but the pre-authorization at the top level wouldn't
            // carry over to the raw contact.
            rawContactsUri = preAuthorizeUri(RawContactsEntity.PROFILE_CONTENT_URI);
        } else {
            rawContactsUri = RawContactsEntity.CONTENT_URI;
        }
        try {
            writer = new BufferedWriter(new OutputStreamWriter(stream));
            if (!composer.init(uri, selection, selectionArgs, null, rawContactsUri)) {
                Log.w(TAG, "Failed to init VCardComposer");
                return;
            }

            while (!composer.isAfterLast()) {
                writer.write(composer.createOneEntry());
            }
        } catch (IOException e) {
            Log.e(TAG, "IOException: " + e);
        } finally {
            composer.terminate();
            if (writer != null) {
                try {
                    writer.close();
                } catch (IOException e) {
                    Log.w(TAG, "IOException during closing output stream: " + e);
                }
            }
        }
    }

    @Override
    public String getType(Uri uri) {

        waitForAccess(mReadAccessLatch);

        final int match = sUriMatcher.match(uri);
        switch (match) {
            case CONTACTS:
                return Contacts.CONTENT_TYPE;
            case CONTACTS_LOOKUP:
            case CONTACTS_ID:
            case CONTACTS_LOOKUP_ID:
            case PROFILE:
                return Contacts.CONTENT_ITEM_TYPE;
            case CONTACTS_AS_VCARD:
            case CONTACTS_AS_MULTI_VCARD:
            case PROFILE_AS_VCARD:
                return Contacts.CONTENT_VCARD_TYPE;
            case CONTACTS_ID_PHOTO:
            case CONTACTS_LOOKUP_PHOTO:
            case CONTACTS_LOOKUP_ID_PHOTO:
            case CONTACTS_ID_DISPLAY_PHOTO:
            case CONTACTS_LOOKUP_DISPLAY_PHOTO:
            case CONTACTS_LOOKUP_ID_DISPLAY_PHOTO:
            case RAW_CONTACTS_ID_DISPLAY_PHOTO:
            case DISPLAY_PHOTO_ID:
                return "image/jpeg";
            case RAW_CONTACTS:
            case PROFILE_RAW_CONTACTS:
                return RawContacts.CONTENT_TYPE;
            case RAW_CONTACTS_ID:
            case PROFILE_RAW_CONTACTS_ID:
                return RawContacts.CONTENT_ITEM_TYPE;
            case DATA:
            case PROFILE_DATA:
                return Data.CONTENT_TYPE;
            case DATA_ID:
                long id = ContentUris.parseId(uri);
                if (ContactsContract.isProfileId(id)) {
                    return mProfileHelper.getDataMimeType(id);
                } else {
                    return mContactsHelper.getDataMimeType(id);
                }
            case PHONES:
                return Phone.CONTENT_TYPE;
            case PHONES_ID:
                return Phone.CONTENT_ITEM_TYPE;
            case PHONE_LOOKUP:
                return PhoneLookup.CONTENT_TYPE;
            case EMAILS:
                return Email.CONTENT_TYPE;
            case EMAILS_ID:
                return Email.CONTENT_ITEM_TYPE;
            case POSTALS:
                return StructuredPostal.CONTENT_TYPE;
            case POSTALS_ID:
                return StructuredPostal.CONTENT_ITEM_TYPE;
            case AGGREGATION_EXCEPTIONS:
                return AggregationExceptions.CONTENT_TYPE;
            case AGGREGATION_EXCEPTION_ID:
                return AggregationExceptions.CONTENT_ITEM_TYPE;
            case SETTINGS:
                return Settings.CONTENT_TYPE;
            case AGGREGATION_SUGGESTIONS:
                return Contacts.CONTENT_TYPE;
            case SEARCH_SUGGESTIONS:
                return SearchManager.SUGGEST_MIME_TYPE;
            case SEARCH_SHORTCUT:
                return SearchManager.SHORTCUT_MIME_TYPE;
            case DIRECTORIES:
                return Directory.CONTENT_TYPE;
            case DIRECTORIES_ID:
                return Directory.CONTENT_ITEM_TYPE;
            case STREAM_ITEMS:
                return StreamItems.CONTENT_TYPE;
            case STREAM_ITEMS_ID:
                return StreamItems.CONTENT_ITEM_TYPE;
            case STREAM_ITEMS_ID_PHOTOS:
                return StreamItems.StreamItemPhotos.CONTENT_TYPE;
            case STREAM_ITEMS_ID_PHOTOS_ID:
                return StreamItems.StreamItemPhotos.CONTENT_ITEM_TYPE;
            case STREAM_ITEMS_PHOTOS:
                throw new UnsupportedOperationException("Not supported for write-only URI " + uri);
            default:
                return mLegacyApiSupport.getType(uri);
        }
    }

    public String[] getDefaultProjection(Uri uri) {
        final int match = sUriMatcher.match(uri);
        switch (match) {
            case CONTACTS:
            case CONTACTS_LOOKUP:
            case CONTACTS_ID:
            case CONTACTS_LOOKUP_ID:
            case AGGREGATION_SUGGESTIONS:
            case PROFILE:
                return sContactsProjectionMap.getColumnNames();

            case CONTACTS_ID_ENTITIES:
            case PROFILE_ENTITIES:
                return sEntityProjectionMap.getColumnNames();

            case CONTACTS_AS_VCARD:
            case CONTACTS_AS_MULTI_VCARD:
            case PROFILE_AS_VCARD:
                return sContactsVCardProjectionMap.getColumnNames();

            case RAW_CONTACTS:
            case RAW_CONTACTS_ID:
            case PROFILE_RAW_CONTACTS:
            case PROFILE_RAW_CONTACTS_ID:
                return sRawContactsProjectionMap.getColumnNames();

            case DATA_ID:
            case PHONES:
            case PHONES_ID:
            case EMAILS:
            case EMAILS_ID:
            case POSTALS:
            case POSTALS_ID:
            case PROFILE_DATA:
                return sDataProjectionMap.getColumnNames();

            case PHONE_LOOKUP:
                return sPhoneLookupProjectionMap.getColumnNames();

            case AGGREGATION_EXCEPTIONS:
            case AGGREGATION_EXCEPTION_ID:
                return sAggregationExceptionsProjectionMap.getColumnNames();

            case SETTINGS:
                return sSettingsProjectionMap.getColumnNames();

            case DIRECTORIES:
            case DIRECTORIES_ID:
                return sDirectoryProjectionMap.getColumnNames();

            default:
                return null;
        }
    }

    private class StructuredNameLookupBuilder extends NameLookupBuilder {

        public StructuredNameLookupBuilder(NameSplitter splitter) {
            super(splitter);
        }

        @Override
        protected void insertNameLookup(long rawContactId, long dataId, int lookupType,
                String name) {
            mDbHelper.get().insertNameLookup(rawContactId, dataId, lookupType, name);
        }

        @Override
        protected String[] getCommonNicknameClusters(String normalizedName) {
            return mCommonNicknameCache.getCommonNicknameClusters(normalizedName);
        }
    }

    public void appendContactFilterAsNestedQuery(StringBuilder sb, String filterParam) {
        sb.append("(" +
                "SELECT DISTINCT " + RawContacts.CONTACT_ID +
                " FROM " + Tables.RAW_CONTACTS +
                " JOIN " + Tables.NAME_LOOKUP +
                " ON(" + RawContactsColumns.CONCRETE_ID + "="
                        + NameLookupColumns.RAW_CONTACT_ID + ")" +
                " WHERE normalized_name GLOB '");
        sb.append(NameNormalizer.normalize(filterParam));
        sb.append("*' AND " + NameLookupColumns.NAME_TYPE +
                    " IN(" + CONTACT_LOOKUP_NAME_TYPES + "))");
    }

    public boolean isPhoneNumber(String query) {
        if (TextUtils.isEmpty(query)) {
            return false;
        }
        // assume a phone number if it has at least 1 digit
        return countPhoneNumberDigits(query) > 0;
    }

    /**
     * Returns the number of digitis in a phone number ignoring special characters such as '-'.
     * If the string is not a valid phone number, 0 is returned.
     */
    public static int countPhoneNumberDigits(String query) {
        int numDigits = 0;
        int len = query.length();
        for (int i = 0; i < len; i++) {
            char c = query.charAt(i);
            if (Character.isDigit(c)) {
                numDigits ++;
            } else if (c == '*' || c == '#' || c == 'N' || c == '.' || c == ';'
                    || c == '-' || c == '(' || c == ')' || c == ' ') {
                // carry on
            } else if (c == '+' && numDigits == 0) {
                // plus before any digits is ok
            } else {
                return 0; // not a phone number
            }
        }
        return numDigits;
    }

    /**
     * Takes components of a name from the query parameters and returns a cursor with those
     * components as well as all missing components.  There is no database activity involved
     * in this so the call can be made on the UI thread.
     */
    private Cursor completeName(Uri uri, String[] projection) {
        if (projection == null) {
            projection = sDataProjectionMap.getColumnNames();
        }

        ContentValues values = new ContentValues();
        DataRowHandlerForStructuredName handler = (DataRowHandlerForStructuredName)
                getDataRowHandler(StructuredName.CONTENT_ITEM_TYPE);

        copyQueryParamsToContentValues(values, uri,
                StructuredName.DISPLAY_NAME,
                StructuredName.PREFIX,
                StructuredName.GIVEN_NAME,
                StructuredName.MIDDLE_NAME,
                StructuredName.FAMILY_NAME,
                StructuredName.SUFFIX,
                StructuredName.PHONETIC_NAME,
                StructuredName.PHONETIC_FAMILY_NAME,
                StructuredName.PHONETIC_MIDDLE_NAME,
                StructuredName.PHONETIC_GIVEN_NAME
        );

        handler.fixStructuredNameComponents(values, values);

        MatrixCursor cursor = new MatrixCursor(projection);
        Object[] row = new Object[projection.length];
        for (int i = 0; i < projection.length; i++) {
            row[i] = values.get(projection[i]);
        }
        cursor.addRow(row);
        return cursor;
    }

    private void copyQueryParamsToContentValues(ContentValues values, Uri uri, String... columns) {
        for (String column : columns) {
            String param = uri.getQueryParameter(column);
            if (param != null) {
                values.put(column, param);
            }
        }
    }


    /**
     * Inserts an argument at the beginning of the selection arg list.
     */
    private String[] insertSelectionArg(String[] selectionArgs, String arg) {
        if (selectionArgs == null) {
            return new String[] {arg};
        } else {
            int newLength = selectionArgs.length + 1;
            String[] newSelectionArgs = new String[newLength];
            newSelectionArgs[0] = arg;
            System.arraycopy(selectionArgs, 0, newSelectionArgs, 1, selectionArgs.length);
            return newSelectionArgs;
        }
    }

    private String[] appendProjectionArg(String[] projection, String arg) {
        if (projection == null) {
            return null;
        }
        final int length = projection.length;
        String[] newProjection = new String[length + 1];
        System.arraycopy(projection, 0, newProjection, 0, length);
        newProjection[length] = arg;
        return newProjection;
    }

    protected Account getDefaultAccount() {
        AccountManager accountManager = AccountManager.get(getContext());
        try {
            Account[] accounts = accountManager.getAccountsByType(DEFAULT_ACCOUNT_TYPE);
            if (accounts != null && accounts.length > 0) {
                return accounts[0];
            }
        } catch (Throwable e) {
            Log.e(TAG, "Cannot determine the default account for contacts compatibility", e);
        }
        return null;
    }

    /**
     * Returns true if the specified account type and data set is writable.
     */
    public boolean isWritableAccountWithDataSet(String accountTypeAndDataSet) {
        if (accountTypeAndDataSet == null) {
            return true;
        }

        Boolean writable = mAccountWritability.get(accountTypeAndDataSet);
        if (writable != null) {
            return writable;
        }

        IContentService contentService = ContentResolver.getContentService();
        try {
            // TODO(dsantoro): Need to update this logic to allow for sub-accounts.
            for (SyncAdapterType sync : contentService.getSyncAdapterTypes()) {
                if (ContactsContract.AUTHORITY.equals(sync.authority) &&
                        accountTypeAndDataSet.equals(sync.accountType)) {
                    writable = sync.supportsUploading();
                    break;
                }
            }
        } catch (RemoteException e) {
            Log.e(TAG, "Could not acquire sync adapter types");
        }

        if (writable == null) {
            writable = false;
        }

        mAccountWritability.put(accountTypeAndDataSet, writable);
        return writable;
    }


    /* package */ static boolean readBooleanQueryParameter(Uri uri, String parameter,
            boolean defaultValue) {

        // Manually parse the query, which is much faster than calling uri.getQueryParameter
        String query = uri.getEncodedQuery();
        if (query == null) {
            return defaultValue;
        }

        int index = query.indexOf(parameter);
        if (index == -1) {
            return defaultValue;
        }

        index += parameter.length();

        return !matchQueryParameter(query, index, "=0", false)
                && !matchQueryParameter(query, index, "=false", true);
    }

    private static boolean matchQueryParameter(String query, int index, String value,
            boolean ignoreCase) {
        int length = value.length();
        return query.regionMatches(ignoreCase, index, value, 0, length)
                && (query.length() == index + length || query.charAt(index + length) == '&');
    }

    /**
     * A fast re-implementation of {@link Uri#getQueryParameter}
     */
    /* package */ static String getQueryParameter(Uri uri, String parameter) {
        String query = uri.getEncodedQuery();
        if (query == null) {
            return null;
        }

        int queryLength = query.length();
        int parameterLength = parameter.length();

        String value;
        int index = 0;
        while (true) {
            index = query.indexOf(parameter, index);
            if (index == -1) {
                return null;
            }

            // Should match against the whole parameter instead of its suffix.
            // e.g. The parameter "param" must not be found in "some_param=val".
            if (index > 0) {
                char prevChar = query.charAt(index - 1);
                if (prevChar != '?' && prevChar != '&') {
                    // With "some_param=val1&param=val2", we should find second "param" occurrence.
                    index += parameterLength;
                    continue;
                }
            }

            index += parameterLength;

            if (queryLength == index) {
                return null;
            }

            if (query.charAt(index) == '=') {
                index++;
                break;
            }
        }

        int ampIndex = query.indexOf('&', index);
        if (ampIndex == -1) {
            value = query.substring(index);
        } else {
            value = query.substring(index, ampIndex);
        }

        return Uri.decode(value);
    }

    protected boolean isAggregationUpgradeNeeded() {
        if (!mContactAggregator.isEnabled()) {
            return false;
        }

        int version = Integer.parseInt(mContactsHelper.getProperty(
                DbProperties.AGGREGATION_ALGORITHM, "1"));
        return version < PROPERTY_AGGREGATION_ALGORITHM_VERSION;
    }

    protected void upgradeAggregationAlgorithmInBackground() {
        Log.i(TAG, "Upgrading aggregation algorithm");
        int count = 0;
        final long start = SystemClock.elapsedRealtime();
        SQLiteDatabase db = null;
        try {
            switchToContactMode();
            db = mContactsHelper.getWritableDatabase();
            mActiveDb.set(db);
            db.beginTransaction();
            Cursor cursor = db.query(true,
                    Tables.RAW_CONTACTS + " r1 JOIN " + Tables.RAW_CONTACTS + " r2",
                    new String[]{"r1." + RawContacts._ID},
                    "r1." + RawContacts._ID + "!=r2." + RawContacts._ID +
                    " AND r1." + RawContacts.CONTACT_ID + "=r2." + RawContacts.CONTACT_ID +
                    " AND r1." + RawContactsColumns.ACCOUNT_ID +
                        "=r2." + RawContactsColumns.ACCOUNT_ID,
                    null, null, null, null, null);
            try {
                while (cursor.moveToNext()) {
                    long rawContactId = cursor.getLong(0);
                    mContactAggregator.markForAggregation(rawContactId,
                            RawContacts.AGGREGATION_MODE_DEFAULT, true);
                    count++;
                }
            } finally {
                cursor.close();
            }
            mContactAggregator.aggregateInTransaction(mTransactionContext.get(), db);
            updateSearchIndexInTransaction();
            db.setTransactionSuccessful();
            mContactsHelper.setProperty(DbProperties.AGGREGATION_ALGORITHM,
                    String.valueOf(PROPERTY_AGGREGATION_ALGORITHM_VERSION));
        } finally {
            if (db != null) {
                db.endTransaction();
            }
            final long end = SystemClock.elapsedRealtime();
            Log.i(TAG, "Aggregation algorithm upgraded for " + count
                    + " contacts, in " + (end - start) + "ms");
        }
    }

    @VisibleForTesting
    boolean isPhone() {
        if (!mIsPhoneInitialized) {
            mIsPhone = new TelephonyManager(getContext()).isVoiceCapable();
            mIsPhoneInitialized = true;
        }
        return mIsPhone;
    }

    boolean isVoiceCapable() {
        // this copied from com.android.phone.PhoneApp.onCreate():

        // "voice capable" flag.
        // This flag currently comes from a resource (which is
        // overrideable on a per-product basis):
        return getContext().getResources()
                .getBoolean(com.android.internal.R.bool.config_voice_capable);
        // ...but this might eventually become a PackageManager "system
        // feature" instead, in which case we'd do something like:
        // return
        //   getPackageManager().hasSystemFeature(PackageManager.FEATURE_TELEPHONY_VOICE_CALLS);
    }

    private boolean handleDataUsageFeedback(Uri uri) {
        final long currentTimeMillis = Clock.getInstance().currentTimeMillis();
        final String usageType = uri.getQueryParameter(DataUsageFeedback.USAGE_TYPE);
        final String[] ids = uri.getLastPathSegment().trim().split(",");
        final ArrayList<Long> dataIds = new ArrayList<Long>(ids.length);

        for (String id : ids) {
            dataIds.add(Long.valueOf(id));
        }
        final boolean successful;
        if (TextUtils.isEmpty(usageType)) {
            Log.w(TAG, "Method for data usage feedback isn't specified. Ignoring.");
            successful = false;
        } else {
            successful = updateDataUsageStat(dataIds, usageType, currentTimeMillis) > 0;
        }

        // Handle old API. This doesn't affect the result of this entire method.
        final StringBuilder rawContactIdSelect = new StringBuilder();
        rawContactIdSelect.append("SELECT " + Data.RAW_CONTACT_ID + " FROM " + Tables.DATA +
                " WHERE " + Data._ID + " IN (");
        for (int i = 0; i < ids.length; i++) {
            if (i > 0) rawContactIdSelect.append(",");
            rawContactIdSelect.append(ids[i]);
        }
        rawContactIdSelect.append(")");

        final SQLiteDatabase db = mActiveDb.get();

        mSelectionArgs1[0] = String.valueOf(currentTimeMillis);

        db.execSQL("UPDATE " + Tables.RAW_CONTACTS +
                " SET " + RawContacts.LAST_TIME_CONTACTED + "=?" +
                "," + RawContacts.TIMES_CONTACTED + "=" +
                    "ifnull(" + RawContacts.TIMES_CONTACTED + ",0) + 1" +
                " WHERE " + RawContacts._ID + " IN (" + rawContactIdSelect.toString() + ")"
                , mSelectionArgs1);
        db.execSQL("UPDATE " + Tables.CONTACTS +
                " SET " + Contacts.LAST_TIME_CONTACTED + "=?" +
                "," + Contacts.TIMES_CONTACTED + "=" +
                    "ifnull(" + Contacts.TIMES_CONTACTED + ",0) + 1" +
                " WHERE " + Contacts._ID + " IN (SELECT " + RawContacts.CONTACT_ID +
                    " FROM " + Tables.RAW_CONTACTS +
                    " WHERE " + RawContacts._ID + " IN (" + rawContactIdSelect.toString() + "))"
                , mSelectionArgs1);
        return successful;
    }

    private interface DataUsageStatQuery {
        String TABLE = Tables.DATA_USAGE_STAT;

        String[] COLUMNS = new String[] {
                DataUsageStatColumns._ID,
        };
        int ID = 0;

        String SELECTION = DataUsageStatColumns.DATA_ID + " =? AND "
                + DataUsageStatColumns.USAGE_TYPE_INT + " =?";
    }

    /**
     * Update {@link Tables#DATA_USAGE_STAT}.
     *
     * @return the number of rows affected.
     */
    @VisibleForTesting
    /* package */ int updateDataUsageStat(
            List<Long> dataIds, String type, long currentTimeMillis) {

        final SQLiteDatabase db = mActiveDb.get();

        final String typeString = String.valueOf(getDataUsageFeedbackType(type, null));
        final String currentTimeMillisString = String.valueOf(currentTimeMillis);

        for (long dataId : dataIds) {
            final String dataIdString = String.valueOf(dataId);
            mSelectionArgs2[0] = dataIdString;
            mSelectionArgs2[1] = typeString;
            final Cursor cursor = db.query(DataUsageStatQuery.TABLE,
                    DataUsageStatQuery.COLUMNS, DataUsageStatQuery.SELECTION,
                    mSelectionArgs2, null, null, null);
            try {
                if (cursor.moveToFirst()) {
                    final long id = cursor.getLong(DataUsageStatQuery.ID);

                    mSelectionArgs2[0] = currentTimeMillisString;
                    mSelectionArgs2[1] = String.valueOf(id);

                    db.execSQL("UPDATE " + Tables.DATA_USAGE_STAT +
                            " SET " + DataUsageStatColumns.TIMES_USED + "=" +
                                "ifnull(" + DataUsageStatColumns.TIMES_USED +",0)+1" +
                            "," + DataUsageStatColumns.LAST_TIME_USED + "=?" +
                            " WHERE " + DataUsageStatColumns._ID + "=?",
                            mSelectionArgs2);
                } else {
                    mSelectionArgs4[0] = dataIdString;
                    mSelectionArgs4[1] = typeString;
                    mSelectionArgs4[2] = "1"; // times used
                    mSelectionArgs4[3] = currentTimeMillisString;
                    db.execSQL("INSERT INTO " + Tables.DATA_USAGE_STAT +
                            "(" + DataUsageStatColumns.DATA_ID +
                            "," + DataUsageStatColumns.USAGE_TYPE_INT +
                            "," + DataUsageStatColumns.TIMES_USED +
                            "," + DataUsageStatColumns.LAST_TIME_USED +
                            ") VALUES (?,?,?,?)",
                            mSelectionArgs4);
                }
            } finally {
                cursor.close();
            }
        }

        return dataIds.size();
    }

    /**
     * Returns a sort order String for promoting data rows (email addresses, phone numbers, etc.)
     * associated with a primary account. The primary account should be supplied from applications
     * with {@link ContactsContract#PRIMARY_ACCOUNT_NAME} and
     * {@link ContactsContract#PRIMARY_ACCOUNT_TYPE}. Null will be returned when the primary
     * account isn't available.
     */
    private String getAccountPromotionSortOrder(Uri uri) {
        final String primaryAccountName =
                uri.getQueryParameter(ContactsContract.PRIMARY_ACCOUNT_NAME);
        final String primaryAccountType =
                uri.getQueryParameter(ContactsContract.PRIMARY_ACCOUNT_TYPE);

        // Data rows associated with primary account should be promoted.
        if (!TextUtils.isEmpty(primaryAccountName)) {
            StringBuilder sb = new StringBuilder();
            sb.append("(CASE WHEN " + RawContacts.ACCOUNT_NAME + "=");
            DatabaseUtils.appendEscapedSQLString(sb, primaryAccountName);
            if (!TextUtils.isEmpty(primaryAccountType)) {
                sb.append(" AND " + RawContacts.ACCOUNT_TYPE + "=");
                DatabaseUtils.appendEscapedSQLString(sb, primaryAccountType);
            }
            sb.append(" THEN 0 ELSE 1 END)");
            return sb.toString();
        } else {
            return null;
        }
    }

    /**
     * Checks the URI for a deferred snippeting request
     * @return a boolean indicating if a deferred snippeting request is in the RI
     */
    private boolean deferredSnippetingRequested(Uri uri) {
        String deferredSnippeting =
            getQueryParameter(uri, SearchSnippetColumns.DEFERRED_SNIPPETING_KEY);
        return !TextUtils.isEmpty(deferredSnippeting) &&  deferredSnippeting.equals("1");
    }

    /**
     * Checks if query is a single word or not.
     * @return a boolean indicating if the query is one word or not
     */
    private boolean isSingleWordQuery(String query) {
        return query.split(QUERY_TOKENIZER_REGEX).length == 1;
    }

    /**
     * Checks the projection for a SNIPPET column indicating that a snippet is needed
     * @return a boolean indicating if a snippet is needed or not.
     */
    private boolean snippetNeeded(String [] projection) {
        return ContactsDatabaseHelper.isInProjection(projection, SearchSnippetColumns.SNIPPET);
    }

    /**
     * Create a single row cursor for a simple, informational queries, such as
     * {@link ProviderStatus#CONTENT_URI}.
     */
    @VisibleForTesting
    static Cursor buildSingleRowResult(String[] projection, String[] availableColumns,
            Object[] data) {
        Preconditions.checkArgument(availableColumns.length == data.length);
        if (projection == null) {
            projection = availableColumns;
        }
        final MatrixCursor c = new MatrixCursor(projection, 1);
        final RowBuilder row = c.newRow();

        // It's O(n^2), but it's okay because we only have a few columns.
        for (int i = 0; i < c.getColumnCount(); i++) {
            final String column = c.getColumnName(i);

            boolean found = false;
            for (int j = 0; j < availableColumns.length; j++) {
                if (availableColumns[j].equals(column)) {
                    row.add(data[j]);
                    found = true;
                    break;
                }
            }
            if (!found) {
                throw new IllegalArgumentException("Invalid column " + projection[i]);
            }
        }
        return c;
    }

    /**
     * @return the currently active {@link ContactsDatabaseHelper} for the current thread.
     */
    @NeededForTesting
    public ContactsDatabaseHelper getThreadActiveDatabaseHelperForTest() {
        return mDbHelper.get();
    }

    @Override
    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
        pw.print("FastScrollingIndex stats:\n");
        pw.printf("request=%d  miss=%d (%d%%)  avg time=%dms\n",
                mFastScrollingIndexCacheRequestCount,
                mFastScrollingIndexCacheMissCount,
                safeDiv(mFastScrollingIndexCacheMissCount * 100,
                        mFastScrollingIndexCacheRequestCount),
                safeDiv(mTotalTimeFastScrollingIndexGenerate, mFastScrollingIndexCacheMissCount)
                );
    }

    private static final long safeDiv(long dividend, long divisor) {
        return (divisor == 0) ? 0 : dividend / divisor;
    }

    private static final int getDataUsageFeedbackType(String type, Integer defaultType) {
        if (DataUsageFeedback.USAGE_TYPE_CALL.equals(type)) {
            return DataUsageStatColumns.USAGE_TYPE_INT_CALL; // 0
        }
        if (DataUsageFeedback.USAGE_TYPE_LONG_TEXT.equals(type)) {
            return DataUsageStatColumns.USAGE_TYPE_INT_LONG_TEXT; // 1
        }
        if (DataUsageFeedback.USAGE_TYPE_SHORT_TEXT.equals(type)) {
            return DataUsageStatColumns.USAGE_TYPE_INT_SHORT_TEXT; // 2
        }
        if (defaultType != null) {
            return defaultType;
        }
        throw new IllegalArgumentException("Invalid usage type " + type);
    }
}