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

/*
 * Copyright (C) 2015 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.aggregation;

import com.android.internal.annotations.VisibleForTesting;
import com.android.providers.contacts.ContactLookupKey;
import com.android.providers.contacts.ContactsDatabaseHelper;
import com.android.providers.contacts.ContactsDatabaseHelper.AccountsColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.AggregatedPresenceColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.ContactsColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.DataColumns;
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.PresenceColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.RawContactsColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.StatusUpdatesColumns;
import com.android.providers.contacts.ContactsDatabaseHelper.Tables;
import com.android.providers.contacts.ContactsDatabaseHelper.Views;
import com.android.providers.contacts.ContactsProvider2;
import com.android.providers.contacts.NameLookupBuilder;
import com.android.providers.contacts.NameNormalizer;
import com.android.providers.contacts.NameSplitter;
import com.android.providers.contacts.PhotoPriorityResolver;
import com.android.providers.contacts.ReorderingCursorWrapper;
import com.android.providers.contacts.TransactionContext;
import com.android.providers.contacts.aggregation.util.CommonNicknameCache;
import com.android.providers.contacts.aggregation.util.ContactAggregatorHelper;
import com.android.providers.contacts.aggregation.util.ContactMatcher;
import com.android.providers.contacts.aggregation.util.MatchScore;
import com.android.providers.contacts.util.Clock;
import com.google.android.collect.Maps;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.Multimap;

import android.database.Cursor;
import android.database.DatabaseUtils;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteQueryBuilder;
import android.database.sqlite.SQLiteStatement;
import android.net.Uri;
import android.provider.ContactsContract.AggregationExceptions;
import android.provider.ContactsContract.CommonDataKinds.Email;
import android.provider.ContactsContract.CommonDataKinds.Identity;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.provider.ContactsContract.CommonDataKinds.Photo;
import android.provider.ContactsContract.Contacts;
import android.provider.ContactsContract.Data;
import android.provider.ContactsContract.DisplayNameSources;
import android.provider.ContactsContract.FullNameStyle;
import android.provider.ContactsContract.PhotoFiles;
import android.provider.ContactsContract.PinnedPositions;
import android.provider.ContactsContract.RawContacts;
import android.provider.ContactsContract.StatusUpdates;
import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.EventLog;
import android.util.Log;
import android.util.Slog;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Set;

/**
 * Base class of contact aggregator and profile aggregator
 */
public abstract class AbstractContactAggregator {

    protected static final String TAG = "ContactAggregator";

    protected static final boolean DEBUG_LOGGING = Log.isLoggable(TAG, Log.DEBUG);
    protected static final boolean VERBOSE_LOGGING = Log.isLoggable(TAG, Log.VERBOSE);

    protected static final String STRUCTURED_NAME_BASED_LOOKUP_SQL =
            NameLookupColumns.NAME_TYPE + " IN ("
                    + NameLookupType.NAME_EXACT + ","
                    + NameLookupType.NAME_VARIANT + ","
                    + NameLookupType.NAME_COLLATION_KEY + ")";


    /**
     * SQL statement that sets the {@link ContactsColumns#LAST_STATUS_UPDATE_ID} column
     * on the contact to point to the latest social status update.
     */
    protected static final String UPDATE_LAST_STATUS_UPDATE_ID_SQL =
            "UPDATE " + Tables.CONTACTS +
            " SET " + ContactsColumns.LAST_STATUS_UPDATE_ID + "=" +
                    "(SELECT " + DataColumns.CONCRETE_ID +
                    " FROM " + Tables.STATUS_UPDATES +
                    " JOIN " + Tables.DATA +
                    "   ON (" + StatusUpdatesColumns.DATA_ID + "="
                            + DataColumns.CONCRETE_ID + ")" +
                    " JOIN " + Tables.RAW_CONTACTS +
                    "   ON (" + DataColumns.CONCRETE_RAW_CONTACT_ID + "="
                            + RawContactsColumns.CONCRETE_ID + ")" +
                    " WHERE " + RawContacts.CONTACT_ID + "=?" +
                    " ORDER BY " + StatusUpdates.STATUS_TIMESTAMP + " DESC,"
                            + StatusUpdates.STATUS +
                    " LIMIT 1)" +
            " WHERE " + ContactsColumns.CONCRETE_ID + "=?";

    // From system/core/logcat/event-log-tags
    // aggregator [time, count] will be logged for each aggregator cycle.
    // For the query (as opposed to the merge), count will be negative
    static final int LOG_SYNC_CONTACTS_AGGREGATION = 2747;

    // If we encounter more than this many contacts with matching names, aggregate only this many
    protected static final int PRIMARY_HIT_LIMIT = 15;
    protected static final String PRIMARY_HIT_LIMIT_STRING = String.valueOf(PRIMARY_HIT_LIMIT);

    // If we encounter more than this many contacts with matching phone number or email,
    // don't attempt to aggregate - this is likely an error or a shared corporate data element.
    protected static final int SECONDARY_HIT_LIMIT = 20;
    protected static final String SECONDARY_HIT_LIMIT_STRING = String.valueOf(SECONDARY_HIT_LIMIT);

    // If we encounter no less than this many raw contacts in the best matching contact during
    // aggregation, don't attempt to aggregate - this is likely an error or a shared corporate
    // data element.
    @VisibleForTesting
    static final int AGGREGATION_CONTACT_SIZE_LIMIT = 50;

    // If we encounter more than this many contacts with matching name during aggregation
    // suggestion lookup, ignore the remaining results.
    protected static final int FIRST_LETTER_SUGGESTION_HIT_LIMIT = 100;

    protected final ContactsProvider2 mContactsProvider;
    protected final ContactsDatabaseHelper mDbHelper;
    protected PhotoPriorityResolver mPhotoPriorityResolver;
    protected final NameSplitter mNameSplitter;
    protected final CommonNicknameCache mCommonNicknameCache;

    protected boolean mEnabled = true;

    /**
     * Precompiled sql statement for setting an aggregated presence
     */
    protected SQLiteStatement mRawContactCountQuery;
    protected SQLiteStatement mAggregatedPresenceDelete;
    protected SQLiteStatement mAggregatedPresenceReplace;
    protected SQLiteStatement mPresenceContactIdUpdate;
    protected SQLiteStatement mMarkForAggregation;
    protected SQLiteStatement mPhotoIdUpdate;
    protected SQLiteStatement mDisplayNameUpdate;
    protected SQLiteStatement mLookupKeyUpdate;
    protected SQLiteStatement mStarredUpdate;
    protected SQLiteStatement mSendToVoicemailUpdate;
    protected SQLiteStatement mPinnedUpdate;
    protected SQLiteStatement mContactIdAndMarkAggregatedUpdate;
    protected SQLiteStatement mContactIdUpdate;
    protected SQLiteStatement mContactUpdate;
    protected SQLiteStatement mContactInsert;
    protected SQLiteStatement mResetPinnedForRawContact;

    protected ArrayMap<Long, Integer> mRawContactsMarkedForAggregation = new ArrayMap<>();

    protected String[] mSelectionArgs1 = new String[1];
    protected String[] mSelectionArgs2 = new String[2];

    protected long mMimeTypeIdIdentity;
    protected long mMimeTypeIdEmail;
    protected long mMimeTypeIdPhoto;
    protected long mMimeTypeIdPhone;
    protected String mRawContactsQueryByRawContactId;
    protected String mRawContactsQueryByContactId;
    protected StringBuilder mSb = new StringBuilder();
    protected MatchCandidateList mCandidates = new MatchCandidateList();
    protected DisplayNameCandidate mDisplayNameCandidate = new DisplayNameCandidate();

    /**
     * Parameter for the suggestion lookup query.
     */
    public static final class AggregationSuggestionParameter {
        public final String kind;
        public final String value;

        public AggregationSuggestionParameter(String kind, String value) {
            this.kind = kind;
            this.value = value;
        }
    }

    /**
     * Captures a potential match for a given name. The matching algorithm
     * constructs a bunch of NameMatchCandidate objects for various potential matches
     * and then executes the search in bulk.
     */
    protected static class NameMatchCandidate {
        String mName;
        int mLookupType;

        public NameMatchCandidate(String name, int nameLookupType) {
            mName = name;
            mLookupType = nameLookupType;
        }
    }

    /**
     * A list of {@link NameMatchCandidate} that keeps its elements even when the list is
     * truncated. This is done for optimization purposes to avoid excessive object allocation.
     */
    protected static class MatchCandidateList {
        protected final ArrayList<NameMatchCandidate> mList = new ArrayList<NameMatchCandidate>();
        protected int mCount;

        /**
         * Adds a {@link NameMatchCandidate} element or updates the next one if it already exists.
         */
        public void add(String name, int nameLookupType) {
            if (mCount >= mList.size()) {
                mList.add(new NameMatchCandidate(name, nameLookupType));
            } else {
                NameMatchCandidate candidate = mList.get(mCount);
                candidate.mName = name;
                candidate.mLookupType = nameLookupType;
            }
            mCount++;
        }

        public void clear() {
            mCount = 0;
        }

        public boolean isEmpty() {
            return mCount == 0;
        }
    }

    /**
     * A convenience class used in the algorithm that figures out which of available
     * display names to use for an aggregate contact.
     */
    private static class DisplayNameCandidate {
        long rawContactId;
        String displayName;
        int displayNameSource;
        boolean isNameSuperPrimary;
        boolean writableAccount;

        public DisplayNameCandidate() {
            clear();
        }

        public void clear() {
            rawContactId = -1;
            displayName = null;
            displayNameSource = DisplayNameSources.UNDEFINED;
            isNameSuperPrimary = false;
            writableAccount = false;
        }
    }

    /**
     * Constructor.
     */
    public AbstractContactAggregator(ContactsProvider2 contactsProvider,
            ContactsDatabaseHelper contactsDatabaseHelper,
            PhotoPriorityResolver photoPriorityResolver, NameSplitter nameSplitter,
            CommonNicknameCache commonNicknameCache) {
        mContactsProvider = contactsProvider;
        mDbHelper = contactsDatabaseHelper;
        mPhotoPriorityResolver = photoPriorityResolver;
        mNameSplitter = nameSplitter;
        mCommonNicknameCache = commonNicknameCache;

        SQLiteDatabase db = mDbHelper.getReadableDatabase();

        // Since we have no way of determining which custom status was set last,
        // we'll just pick one randomly.  We are using MAX as an approximation of randomness
        final String replaceAggregatePresenceSql =
                "INSERT OR REPLACE INTO " + Tables.AGGREGATED_PRESENCE + "("
                + AggregatedPresenceColumns.CONTACT_ID + ", "
                + StatusUpdates.PRESENCE + ", "
                + StatusUpdates.CHAT_CAPABILITY + ")"
                + " SELECT " + PresenceColumns.CONTACT_ID + ","
                + StatusUpdates.PRESENCE + ","
                + StatusUpdates.CHAT_CAPABILITY
                + " FROM " + Tables.PRESENCE
                + " WHERE "
                + " (" + StatusUpdates.PRESENCE
                +       " * 10 + " + StatusUpdates.CHAT_CAPABILITY + ")"
                + " = (SELECT "
                + "MAX (" + StatusUpdates.PRESENCE
                +       " * 10 + " + StatusUpdates.CHAT_CAPABILITY + ")"
                + " FROM " + Tables.PRESENCE
                + " WHERE " + PresenceColumns.CONTACT_ID
                + "=?)"
                + " AND " + PresenceColumns.CONTACT_ID
                + "=?;";
        mAggregatedPresenceReplace = db.compileStatement(replaceAggregatePresenceSql);

        mRawContactCountQuery = db.compileStatement(
                "SELECT COUNT(" + RawContacts._ID + ")" +
                " FROM " + Tables.RAW_CONTACTS +
                " WHERE " + RawContacts.CONTACT_ID + "=?"
                        + " AND " + RawContacts._ID + "<>?");

        mAggregatedPresenceDelete = db.compileStatement(
                "DELETE FROM " + Tables.AGGREGATED_PRESENCE +
                " WHERE " + AggregatedPresenceColumns.CONTACT_ID + "=?");

        mMarkForAggregation = db.compileStatement(
                "UPDATE " + Tables.RAW_CONTACTS +
                " SET " + RawContactsColumns.AGGREGATION_NEEDED + "=1" +
                " WHERE " + RawContacts._ID + "=?"
                        + " AND " + RawContactsColumns.AGGREGATION_NEEDED + "=0");

        mPhotoIdUpdate = db.compileStatement(
                "UPDATE " + Tables.CONTACTS +
                " SET " + Contacts.PHOTO_ID + "=?," + Contacts.PHOTO_FILE_ID + "=? " +
                " WHERE " + Contacts._ID + "=?");

        mDisplayNameUpdate = db.compileStatement(
                "UPDATE " + Tables.CONTACTS +
                " SET " + Contacts.NAME_RAW_CONTACT_ID + "=? " +
                " WHERE " + Contacts._ID + "=?");

        mLookupKeyUpdate = db.compileStatement(
                "UPDATE " + Tables.CONTACTS +
                " SET " + Contacts.LOOKUP_KEY + "=? " +
                " WHERE " + Contacts._ID + "=?");

        mStarredUpdate = db.compileStatement("UPDATE " + Tables.CONTACTS + " SET "
                + Contacts.STARRED + "=(SELECT (CASE WHEN COUNT(" + RawContacts.STARRED
                + ")=0 THEN 0 ELSE 1 END) FROM " + Tables.RAW_CONTACTS + " WHERE "
                + RawContacts.CONTACT_ID + "=" + ContactsColumns.CONCRETE_ID + " AND "
                + RawContacts.STARRED + "=1)" + " WHERE " + Contacts._ID + "=?");

        mSendToVoicemailUpdate = db.compileStatement("UPDATE " + Tables.CONTACTS + " SET "
                + Contacts.SEND_TO_VOICEMAIL + "=(CASE WHEN (SELECT COUNT( "
                + RawContacts.SEND_TO_VOICEMAIL + ") FROM " + Tables.RAW_CONTACTS
                + " WHERE " + RawContacts.CONTACT_ID + "=" + ContactsColumns.CONCRETE_ID + " AND "
                + RawContacts.SEND_TO_VOICEMAIL + "=1) = (SELECT COUNT("
                + RawContacts.SEND_TO_VOICEMAIL + ") FROM " + Tables.RAW_CONTACTS + " WHERE "
                + RawContacts.CONTACT_ID + "=" + ContactsColumns.CONCRETE_ID
                + ") THEN 1 ELSE 0 END)" + " WHERE " + Contacts._ID + "=?");

        mPinnedUpdate = db.compileStatement("UPDATE " + Tables.CONTACTS + " SET "
                + Contacts.PINNED + " = IFNULL((SELECT MIN(" + RawContacts.PINNED + ") FROM "
                + Tables.RAW_CONTACTS + " WHERE " + RawContacts.CONTACT_ID + "="
                + ContactsColumns.CONCRETE_ID + " AND " + RawContacts.PINNED + ">"
                + PinnedPositions.UNPINNED + ")," + PinnedPositions.UNPINNED + ") "
                + "WHERE " + Contacts._ID + "=?");

        mContactIdAndMarkAggregatedUpdate = db.compileStatement(
                "UPDATE " + Tables.RAW_CONTACTS +
                " SET " + RawContacts.CONTACT_ID + "=?, "
                        + RawContactsColumns.AGGREGATION_NEEDED + "=0" +
                " WHERE " + RawContacts._ID + "=?");

        mContactIdUpdate = db.compileStatement(
                "UPDATE " + Tables.RAW_CONTACTS +
                " SET " + RawContacts.CONTACT_ID + "=?" +
                " WHERE " + RawContacts._ID + "=?");

        mPresenceContactIdUpdate = db.compileStatement(
                "UPDATE " + Tables.PRESENCE +
                " SET " + PresenceColumns.CONTACT_ID + "=?" +
                " WHERE " + PresenceColumns.RAW_CONTACT_ID + "=?");

        mContactUpdate = db.compileStatement(ContactReplaceSqlStatement.UPDATE_SQL);
        mContactInsert = db.compileStatement(ContactReplaceSqlStatement.INSERT_SQL);

        mResetPinnedForRawContact = db.compileStatement(
                "UPDATE " + Tables.RAW_CONTACTS +
                " SET " + RawContacts.PINNED + "=" + PinnedPositions.UNPINNED +
                " WHERE " + RawContacts._ID + "=?");

        mMimeTypeIdEmail = mDbHelper.getMimeTypeId(Email.CONTENT_ITEM_TYPE);
        mMimeTypeIdIdentity = mDbHelper.getMimeTypeId(Identity.CONTENT_ITEM_TYPE);
        mMimeTypeIdPhoto = mDbHelper.getMimeTypeId(Photo.CONTENT_ITEM_TYPE);
        mMimeTypeIdPhone = mDbHelper.getMimeTypeId(Phone.CONTENT_ITEM_TYPE);

        // Query used to retrieve data from raw contacts to populate the corresponding aggregate
        mRawContactsQueryByRawContactId = String.format(Locale.US,
                RawContactsQuery.SQL_FORMAT_BY_RAW_CONTACT_ID,
                mDbHelper.getMimeTypeIdForStructuredName(), mMimeTypeIdPhoto, mMimeTypeIdPhone);

        mRawContactsQueryByContactId = String.format(Locale.US,
                RawContactsQuery.SQL_FORMAT_BY_CONTACT_ID,
                mDbHelper.getMimeTypeIdForStructuredName(), mMimeTypeIdPhoto, mMimeTypeIdPhone);
    }

    public final void setEnabled(boolean enabled) {
        mEnabled = enabled;
    }

    public final boolean isEnabled() {
        return mEnabled;
    }

    protected interface AggregationQuery {
        String SQL =
                "SELECT " + RawContacts._ID + "," + RawContacts.CONTACT_ID +
                        ", " + RawContactsColumns.ACCOUNT_ID +
                " FROM " + Tables.RAW_CONTACTS +
                " WHERE " + RawContacts._ID + " IN(";

        int _ID = 0;
        int CONTACT_ID = 1;
        int ACCOUNT_ID = 2;
    }

    /**
     * Aggregate all raw contacts that were marked for aggregation in the current transaction.
     * Call just before committing the transaction.
     */
    // Overridden by ProfileAggregator.
    public void aggregateInTransaction(TransactionContext txContext, SQLiteDatabase db) {
        final int markedCount = mRawContactsMarkedForAggregation.size();
        if (markedCount == 0) {
            return;
        }

        final long start = System.currentTimeMillis();
        if (DEBUG_LOGGING) {
            Log.d(TAG, "aggregateInTransaction for " + markedCount + " contacts");
        }

        EventLog.writeEvent(LOG_SYNC_CONTACTS_AGGREGATION, start, -markedCount);

        int index = 0;

        // We don't use the cached string builder (namely mSb)  here, as this string can be very
        // long when upgrading (where we re-aggregate all visible contacts) and StringBuilder won't
        // shrink the internal storage.
        // Note: don't use selection args here.  We just include all IDs directly in the selection,
        // because there's a limit for the number of parameters in a query.
        final StringBuilder sbQuery = new StringBuilder();
        sbQuery.append(AggregationQuery.SQL);
        for (long rawContactId : mRawContactsMarkedForAggregation.keySet()) {
            if (index > 0) {
                sbQuery.append(',');
            }
            sbQuery.append(rawContactId);
            index++;
        }

        sbQuery.append(')');

        final long[] rawContactIds;
        final long[] contactIds;
        final long[] accountIds;
        final int actualCount;
        final Cursor c = db.rawQuery(sbQuery.toString(), null);
        try {
            actualCount = c.getCount();
            rawContactIds = new long[actualCount];
            contactIds = new long[actualCount];
            accountIds = new long[actualCount];

            index = 0;
            while (c.moveToNext()) {
                rawContactIds[index] = c.getLong(AggregationQuery._ID);
                contactIds[index] = c.getLong(AggregationQuery.CONTACT_ID);
                accountIds[index] = c.getLong(AggregationQuery.ACCOUNT_ID);
                index++;
            }
        } finally {
            c.close();
        }

        if (DEBUG_LOGGING) {
            Log.d(TAG, "aggregateInTransaction: initial query done.");
        }

        for (int i = 0; i < actualCount; i++) {
            aggregateContact(txContext, db, rawContactIds[i], accountIds[i], contactIds[i],
                    mCandidates);
        }

        long elapsedTime = System.currentTimeMillis() - start;
        EventLog.writeEvent(LOG_SYNC_CONTACTS_AGGREGATION, elapsedTime, actualCount);

        if (DEBUG_LOGGING) {
            Log.d(TAG, "Contact aggregation complete: " + actualCount +
                    (actualCount == 0 ? "" : ", " + (elapsedTime / actualCount)
                            + " ms per raw contact"));
        }
    }

    @SuppressWarnings("deprecation")
    public final void triggerAggregation(TransactionContext txContext, long rawContactId) {
        if (!mEnabled) {
            return;
        }

        int aggregationMode = mDbHelper.getAggregationMode(rawContactId);
        switch (aggregationMode) {
            case RawContacts.AGGREGATION_MODE_DISABLED:
                break;

            case RawContacts.AGGREGATION_MODE_DEFAULT: {
                markForAggregation(rawContactId, aggregationMode, false);
                break;
            }

            case RawContacts.AGGREGATION_MODE_SUSPENDED: {
                long contactId = mDbHelper.getContactId(rawContactId);

                if (contactId != 0) {
                    updateAggregateData(txContext, contactId);
                }
                break;
            }

            case RawContacts.AGGREGATION_MODE_IMMEDIATE: {
                aggregateContact(txContext, mDbHelper.getWritableDatabase(), rawContactId);
                break;
            }
        }
    }

    public final void clearPendingAggregations() {
        // HashMap woulnd't shrink the internal table once expands it, so let's just re-create
        // a new one instead of clear()ing it.
        mRawContactsMarkedForAggregation = new ArrayMap<>();
    }

    public final void markNewForAggregation(long rawContactId, int aggregationMode) {
        mRawContactsMarkedForAggregation.put(rawContactId, aggregationMode);
    }

    public final void markForAggregation(long rawContactId, int aggregationMode, boolean force) {
        final int effectiveAggregationMode;
        if (!force && mRawContactsMarkedForAggregation.containsKey(rawContactId)) {
            // As per ContactsContract documentation, default aggregation mode
            // does not override a previously set mode
            if (aggregationMode == RawContacts.AGGREGATION_MODE_DEFAULT) {
                effectiveAggregationMode = mRawContactsMarkedForAggregation.get(rawContactId);
            } else {
                effectiveAggregationMode = aggregationMode;
            }
        } else {
            mMarkForAggregation.bindLong(1, rawContactId);
            mMarkForAggregation.execute();
            effectiveAggregationMode = aggregationMode;
        }

        mRawContactsMarkedForAggregation.put(rawContactId, effectiveAggregationMode);
    }

    private static class RawContactIdAndAggregationModeQuery {
        public static final String TABLE = Tables.RAW_CONTACTS;

        public static final String[] COLUMNS = {RawContacts._ID, RawContacts.AGGREGATION_MODE};

        public static final String SELECTION = RawContacts.CONTACT_ID + "=?";

        public static final int _ID = 0;
        public static final int AGGREGATION_MODE = 1;
    }

    /**
     * Marks all constituent raw contacts of an aggregated contact for re-aggregation.
     */
    protected final void markContactForAggregation(SQLiteDatabase db, long contactId) {
        mSelectionArgs1[0] = String.valueOf(contactId);
        Cursor cursor = db.query(RawContactIdAndAggregationModeQuery.TABLE,
                RawContactIdAndAggregationModeQuery.COLUMNS,
                RawContactIdAndAggregationModeQuery.SELECTION, mSelectionArgs1, null, null, null);
        try {
            if (cursor.moveToFirst()) {
                long rawContactId = cursor.getLong(RawContactIdAndAggregationModeQuery._ID);
                int aggregationMode = cursor.getInt(
                        RawContactIdAndAggregationModeQuery.AGGREGATION_MODE);
                // Don't re-aggregate AGGREGATION_MODE_SUSPENDED / AGGREGATION_MODE_DISABLED.
                // (Also just ignore deprecated AGGREGATION_MODE_IMMEDIATE)
                if (aggregationMode == RawContacts.AGGREGATION_MODE_DEFAULT) {
                    markForAggregation(rawContactId, aggregationMode, true);
                }
            }
        } finally {
            cursor.close();
        }
    }

    /**
     * Mark all visible contacts for re-aggregation.
     *
     * - Set {@link RawContactsColumns#AGGREGATION_NEEDED} For all visible raw_contacts with
     *   {@link RawContacts#AGGREGATION_MODE_DEFAULT}.
     * - Also put them into {@link #mRawContactsMarkedForAggregation}.
     */
    public final int markAllVisibleForAggregation(SQLiteDatabase db) {
        final long start = System.currentTimeMillis();

        // Set AGGREGATION_NEEDED for all visible raw_cotnacts with AGGREGATION_MODE_DEFAULT.
        // (Don't re-aggregate AGGREGATION_MODE_SUSPENDED / AGGREGATION_MODE_DISABLED)
        db.execSQL("UPDATE " + Tables.RAW_CONTACTS + " SET " +
                RawContactsColumns.AGGREGATION_NEEDED + "=1" +
                " WHERE " + RawContacts.CONTACT_ID + " IN " + Tables.DEFAULT_DIRECTORY +
                " AND " + RawContacts.AGGREGATION_MODE + "=" + RawContacts.AGGREGATION_MODE_DEFAULT
                );

        final int count;
        final Cursor cursor = db.rawQuery("SELECT " + RawContacts._ID +
                " FROM " + Tables.RAW_CONTACTS +
                " WHERE " + RawContactsColumns.AGGREGATION_NEEDED + "=1 AND " +
                RawContacts.DELETED + "=0", null);
        try {
            count = cursor.getCount();
            cursor.moveToPosition(-1);
            while (cursor.moveToNext()) {
                final long rawContactId = cursor.getLong(0);
                mRawContactsMarkedForAggregation.put(rawContactId,
                        RawContacts.AGGREGATION_MODE_DEFAULT);
            }
        } finally {
            cursor.close();
        }

        final long end = System.currentTimeMillis();
        Log.i(TAG, "Marked all visible contacts for aggregation: " + count + " raw contacts, " +
                (end - start) + " ms");
        return count;
    }

    /**
     * Creates a new contact based on the given raw contact.  Does not perform aggregation.  Returns
     * the ID of the contact that was created.
     */
    // Overridden by ProfileAggregator.
    public long onRawContactInsert(
            TransactionContext txContext, SQLiteDatabase db, long rawContactId) {
        long contactId = insertContact(db, rawContactId);
        setContactId(rawContactId, contactId);
        mDbHelper.updateContactVisible(txContext, contactId);
        return contactId;
    }

    protected final long insertContact(SQLiteDatabase db, long rawContactId) {
        mSelectionArgs1[0] = String.valueOf(rawContactId);
        computeAggregateData(db, mRawContactsQueryByRawContactId, mSelectionArgs1, mContactInsert);
        return mContactInsert.executeInsert();
    }

    private static final class RawContactIdAndAccountQuery {
        public static final String TABLE = Tables.RAW_CONTACTS;

        public static final String[] COLUMNS = {
                RawContacts.CONTACT_ID,
                RawContactsColumns.ACCOUNT_ID
        };

        public static final String SELECTION = RawContacts._ID + "=?";

        public static final int CONTACT_ID = 0;
        public static final int ACCOUNT_ID = 1;
    }

    // Overridden by ProfileAggregator.
    public void aggregateContact(
            TransactionContext txContext, SQLiteDatabase db, long rawContactId) {
        if (!mEnabled) {
            return;
        }

        MatchCandidateList candidates = new MatchCandidateList();

        long contactId = 0;
        long accountId = 0;
        mSelectionArgs1[0] = String.valueOf(rawContactId);
        Cursor cursor = db.query(RawContactIdAndAccountQuery.TABLE,
                RawContactIdAndAccountQuery.COLUMNS, RawContactIdAndAccountQuery.SELECTION,
                mSelectionArgs1, null, null, null);
        try {
            if (cursor.moveToFirst()) {
                contactId = cursor.getLong(RawContactIdAndAccountQuery.CONTACT_ID);
                accountId = cursor.getLong(RawContactIdAndAccountQuery.ACCOUNT_ID);
            }
        } finally {
            cursor.close();
        }

        aggregateContact(txContext, db, rawContactId, accountId, contactId,
                candidates);
    }

    public void updateAggregateData(TransactionContext txContext, long contactId) {
        if (!mEnabled) {
            return;
        }

        final SQLiteDatabase db = mDbHelper.getWritableDatabase();
        computeAggregateData(db, contactId, mContactUpdate);
        mContactUpdate.bindLong(ContactReplaceSqlStatement.CONTACT_ID, contactId);
        mContactUpdate.execute();

        mDbHelper.updateContactVisible(txContext, contactId);
        updateAggregatedStatusUpdate(contactId);
    }

    protected final void updateAggregatedStatusUpdate(long contactId) {
        mAggregatedPresenceReplace.bindLong(1, contactId);
        mAggregatedPresenceReplace.bindLong(2, contactId);
        mAggregatedPresenceReplace.execute();
        updateLastStatusUpdateId(contactId);
    }

    /**
     * Adjusts the reference to the latest status update for the specified contact.
     */
    public final void updateLastStatusUpdateId(long contactId) {
        String contactIdString = String.valueOf(contactId);
        mDbHelper.getWritableDatabase().execSQL(UPDATE_LAST_STATUS_UPDATE_ID_SQL,
                new String[]{contactIdString, contactIdString});
    }

    /**
     * Given a specific raw contact, finds all matching aggregate contacts and chooses the one
     * with the highest match score.  If no such contact is found, creates a new contact.
     */
    abstract void aggregateContact(TransactionContext txContext, SQLiteDatabase db,
            long rawContactId, long accountId, long currentContactId,
            MatchCandidateList candidates);


    protected interface RawContactMatchingSelectionStatement {
        String SELECT_COUNT = "SELECT count(*) ";
        String SELECT_ID = "SELECT d1." + Data.RAW_CONTACT_ID + ",d2." + Data.RAW_CONTACT_ID;
    }

    /**
     * Build sql to check if there is any identity match/mis-match between two sets of raw contact
     * ids on the same namespace.
     */
    protected final String buildIdentityMatchingSql(String rawContactIdSet1,
            String rawContactIdSet2, boolean isIdentityMatching, boolean countOnly) {
        final String identityType = String.valueOf(mMimeTypeIdIdentity);
        final String matchingOperator = (isIdentityMatching) ? "=" : "!=";
        final String sql =
                " FROM " + Tables.DATA + " AS d1" +
                " JOIN " + Tables.DATA + " AS d2" +
                        " ON (d1." + Identity.IDENTITY + matchingOperator +
                        " d2." + Identity.IDENTITY + " AND" +
                        " d1." + Identity.NAMESPACE + " = d2." + Identity.NAMESPACE + " )" +
                " WHERE d1." + DataColumns.MIMETYPE_ID + " = " + identityType +
                " AND d2." + DataColumns.MIMETYPE_ID + " = " + identityType +
                " AND d1." + Data.RAW_CONTACT_ID + " IN (" + rawContactIdSet1 + ")" +
                " AND d2." + Data.RAW_CONTACT_ID + " IN (" + rawContactIdSet2 + ")";
        return (countOnly) ? RawContactMatchingSelectionStatement.SELECT_COUNT + sql :
                RawContactMatchingSelectionStatement.SELECT_ID + sql;
    }

    protected final String buildEmailMatchingSql(String rawContactIdSet1, String rawContactIdSet2,
            boolean countOnly) {
        final String emailType = String.valueOf(mMimeTypeIdEmail);
        final String sql =
                " FROM " + Tables.DATA + " AS d1" +
                " JOIN " + Tables.DATA + " AS d2" +
                        " ON d1." + Email.ADDRESS + "= d2." + Email.ADDRESS +
                " WHERE d1." + DataColumns.MIMETYPE_ID + " = " + emailType +
                " AND d2." + DataColumns.MIMETYPE_ID + " = " + emailType +
                " AND d1." + Data.RAW_CONTACT_ID + " IN (" + rawContactIdSet1 + ")" +
                " AND d2." + Data.RAW_CONTACT_ID + " IN (" + rawContactIdSet2 + ")";
        return (countOnly) ? RawContactMatchingSelectionStatement.SELECT_COUNT + sql :
                RawContactMatchingSelectionStatement.SELECT_ID + sql;
    }

    protected final String buildPhoneMatchingSql(String rawContactIdSet1, String rawContactIdSet2,
            boolean countOnly) {
        // It's a bit tricker because it has to be consistent with
        // updateMatchScoresBasedOnPhoneMatches().
        final String phoneType = String.valueOf(mMimeTypeIdPhone);
        final String sql =
                " FROM " + Tables.PHONE_LOOKUP + " AS p1" +
                " JOIN " + Tables.DATA + " AS d1 ON " +
                        "(d1." + Data._ID + "=p1." + PhoneLookupColumns.DATA_ID + ")" +
                " JOIN " + Tables.PHONE_LOOKUP + " AS p2 ON (p1." + PhoneLookupColumns.MIN_MATCH +
                        "=p2." + PhoneLookupColumns.MIN_MATCH + ")" +
                " JOIN " + Tables.DATA + " AS d2 ON " +
                        "(d2." + Data._ID + "=p2." + PhoneLookupColumns.DATA_ID + ")" +
                " WHERE d1." + DataColumns.MIMETYPE_ID + " = " + phoneType +
                " AND d2." + DataColumns.MIMETYPE_ID + " = " + phoneType +
                " AND d1." + Data.RAW_CONTACT_ID + " IN (" + rawContactIdSet1 + ")" +
                " AND d2." + Data.RAW_CONTACT_ID + " IN (" + rawContactIdSet2 + ")" +
                " AND PHONE_NUMBERS_EQUAL(d1." + Phone.NUMBER + ",d2." + Phone.NUMBER + "," +
                        String.valueOf(mDbHelper.getUseStrictPhoneNumberComparisonParameter()) +
                        ")";
        return (countOnly) ? RawContactMatchingSelectionStatement.SELECT_COUNT + sql :
                RawContactMatchingSelectionStatement.SELECT_ID + sql;
    }

    protected final String buildExceptionMatchingSql(String rawContactIdSet1,
            String rawContactIdSet2) {
        return "SELECT " + AggregationExceptions.RAW_CONTACT_ID1 + ", " +
                AggregationExceptions.RAW_CONTACT_ID2 +
                " FROM " + Tables.AGGREGATION_EXCEPTIONS +
                " WHERE " + AggregationExceptions.RAW_CONTACT_ID1 + " IN (" +
                rawContactIdSet1 + ")" +
                " AND " + AggregationExceptions.RAW_CONTACT_ID2 + " IN (" + rawContactIdSet2 + ")" +
                " AND " + AggregationExceptions.TYPE + "=" +
                AggregationExceptions.TYPE_KEEP_TOGETHER ;
    }

    protected final boolean isFirstColumnGreaterThanZero(SQLiteDatabase db, String query) {
        return DatabaseUtils.longForQuery(db, query, null) > 0;
    }

    /**
     * Partition the given raw contact Ids to connected component based on aggregation exception,
     * identity matching, email matching or phone matching.
     */
    protected final Set<Set<Long>> findConnectedRawContacts(SQLiteDatabase db, Set<Long>
            rawContactIdSet) {
        // Connections between two raw contacts
        final Multimap<Long, Long> matchingRawIdPairs = HashMultimap.create();
        String rawContactIds = TextUtils.join(",", rawContactIdSet);
        findIdPairs(db, buildExceptionMatchingSql(rawContactIds, rawContactIds),
                matchingRawIdPairs);
        findIdPairs(db, buildIdentityMatchingSql(rawContactIds, rawContactIds,
                /* isIdentityMatching =*/ true, /* countOnly =*/false), matchingRawIdPairs);
        findIdPairs(db, buildEmailMatchingSql(rawContactIds, rawContactIds, /* countOnly =*/false),
                matchingRawIdPairs);
        findIdPairs(db, buildPhoneMatchingSql(rawContactIds, rawContactIds,  /* countOnly =*/false),
                matchingRawIdPairs);

        return ContactAggregatorHelper.findConnectedComponents(rawContactIdSet, matchingRawIdPairs);
    }

    /**
     * Given a query which will return two non-null IDs in the first two columns as results, this
     * method will put two entries into the given result map for each pair of different IDs, one
     * keyed by each ID.
     */
    protected final void findIdPairs(SQLiteDatabase db, String query,
            Multimap<Long, Long> results) {
        Cursor cursor = db.rawQuery(query, null);
        try {
            cursor.moveToPosition(-1);
            while (cursor.moveToNext()) {
                long idA = cursor.getLong(0);
                long idB = cursor.getLong(1);
                if (idA != idB) {
                    results.put(idA, idB);
                    results.put(idB, idA);
                }
            }
        } finally {
            cursor.close();
        }
    }

    /**
     * Creates a new Contact for a given set of the raw contacts of {@code rawContactIds} if the
     * given contactId is null. Otherwise, regroup them into contact with {@code contactId}.
     */
    protected final void createContactForRawContacts(SQLiteDatabase db,
            TransactionContext txContext, Set<Long> rawContactIds, Long contactId) {
        if (rawContactIds.isEmpty()) {
            // No raw contact id is provided.
            return;
        }

        // If contactId is not provided, generates a new one.
        if (contactId == null) {
            mSelectionArgs1[0] = String.valueOf(rawContactIds.iterator().next());
            computeAggregateData(db, mRawContactsQueryByRawContactId, mSelectionArgs1,
                    mContactInsert);
            contactId = mContactInsert.executeInsert();
        }
        for (Long rawContactId : rawContactIds) {
            setContactIdAndMarkAggregated(rawContactId, contactId);
            setPresenceContactId(rawContactId, contactId);
        }
        updateAggregateData(txContext, contactId);
    }

    protected static class RawContactIdQuery {
        public static final String TABLE = Tables.RAW_CONTACTS;
        public static final String[] COLUMNS = {RawContacts._ID, RawContactsColumns.ACCOUNT_ID };
        public static final String SELECTION = RawContacts.CONTACT_ID + "=?";
        public static final int RAW_CONTACT_ID = 0;
        public static final int ACCOUNT_ID = 1;
    }

    /**
     * Updates the contact ID for the specified contact.
     */
    protected final void setContactId(long rawContactId, long contactId) {
        mContactIdUpdate.bindLong(1, contactId);
        mContactIdUpdate.bindLong(2, rawContactId);
        mContactIdUpdate.execute();
    }

    /**
     * Marks the list of raw contact IDs as aggregated.
     *
     * @param rawContactIds comma separated raw contact ids
     */
    protected final void markAggregated(SQLiteDatabase db, String rawContactIds) {
        final String sql = "UPDATE " + Tables.RAW_CONTACTS +
                " SET " + RawContactsColumns.AGGREGATION_NEEDED + "=0" +
                " WHERE " + RawContacts._ID + " in (" + rawContactIds + ")";
        db.execSQL(sql);
    }

    /**
     * Updates the contact ID for the specified contact and marks the raw contact as aggregated.
     */
    private void setContactIdAndMarkAggregated(long rawContactId, long contactId) {
        if (contactId == 0) {
            // Use Slog instead of Log, to prevent the process from crashing.
            Slog.wtfStack(TAG, "Detected contact-id 0");
        }
        mContactIdAndMarkAggregatedUpdate.bindLong(1, contactId);
        mContactIdAndMarkAggregatedUpdate.bindLong(2, rawContactId);
        mContactIdAndMarkAggregatedUpdate.execute();
    }

    private void setPresenceContactId(long rawContactId, long contactId) {
        mPresenceContactIdUpdate.bindLong(1, contactId);
        mPresenceContactIdUpdate.bindLong(2, rawContactId);
        mPresenceContactIdUpdate.execute();
    }

    private void unpinRawContact(long rawContactId) {
        mResetPinnedForRawContact.bindLong(1, rawContactId);
        mResetPinnedForRawContact.execute();
    }

    interface AggregateExceptionPrefetchQuery {
        String TABLE = Tables.AGGREGATION_EXCEPTIONS;

        String[] COLUMNS = {
                AggregationExceptions.RAW_CONTACT_ID1,
                AggregationExceptions.RAW_CONTACT_ID2,
        };

        int RAW_CONTACT_ID1 = 0;
        int RAW_CONTACT_ID2 = 1;
    }

    // A set of raw contact IDs for which there are aggregation exceptions
    protected final ArraySet<Long> mAggregationExceptionIds = new ArraySet<>();
    protected boolean mAggregationExceptionIdsValid;

    public final void invalidateAggregationExceptionCache() {
        mAggregationExceptionIdsValid = false;
    }

    /**
     * Finds all raw contact IDs for which there are aggregation exceptions. The list of
     * ids is used as an optimization in aggregation: there is no point to run a query against
     * the agg_exceptions table if it is known that there are no records there for a given
     * raw contact ID.
     */
    protected final void prefetchAggregationExceptionIds(SQLiteDatabase db) {
        mAggregationExceptionIds.clear();
        final Cursor c = db.query(AggregateExceptionPrefetchQuery.TABLE,
                AggregateExceptionPrefetchQuery.COLUMNS,
                null, null, null, null, null);

        try {
            while (c.moveToNext()) {
                long rawContactId1 = c.getLong(AggregateExceptionPrefetchQuery.RAW_CONTACT_ID1);
                long rawContactId2 = c.getLong(AggregateExceptionPrefetchQuery.RAW_CONTACT_ID2);
                mAggregationExceptionIds.add(rawContactId1);
                mAggregationExceptionIds.add(rawContactId2);
            }
        } finally {
            c.close();
        }

        mAggregationExceptionIdsValid = true;
    }

    protected interface NameLookupQuery {
        String TABLE = Tables.NAME_LOOKUP;

        String SELECTION = NameLookupColumns.RAW_CONTACT_ID + "=?";
        String SELECTION_STRUCTURED_NAME_BASED =
                SELECTION + " AND " + STRUCTURED_NAME_BASED_LOOKUP_SQL;

        String[] COLUMNS = new String[] {
                NameLookupColumns.NORMALIZED_NAME,
                NameLookupColumns.NAME_TYPE
        };

        int NORMALIZED_NAME = 0;
        int NAME_TYPE = 1;
    }

    protected final void loadNameMatchCandidates(SQLiteDatabase db, long rawContactId,
            MatchCandidateList candidates, boolean structuredNameBased) {
        candidates.clear();
        mSelectionArgs1[0] = String.valueOf(rawContactId);
        Cursor c = db.query(NameLookupQuery.TABLE, NameLookupQuery.COLUMNS,
                structuredNameBased
                        ? NameLookupQuery.SELECTION_STRUCTURED_NAME_BASED
                        : NameLookupQuery.SELECTION,
                mSelectionArgs1, null, null, null);
        try {
            while (c.moveToNext()) {
                String normalizedName = c.getString(NameLookupQuery.NORMALIZED_NAME);
                int type = c.getInt(NameLookupQuery.NAME_TYPE);
                candidates.add(normalizedName, type);
            }
        } finally {
            c.close();
        }
    }

    interface AggregateExceptionQuery {
        String TABLE = Tables.AGGREGATION_EXCEPTIONS
                + " JOIN raw_contacts raw_contacts1 "
                + " ON (agg_exceptions.raw_contact_id1 = raw_contacts1._id) "
                + " JOIN raw_contacts raw_contacts2 "
                + " ON (agg_exceptions.raw_contact_id2 = raw_contacts2._id) ";

        String[] COLUMNS = {
                AggregationExceptions.TYPE,
                AggregationExceptions.RAW_CONTACT_ID1,
                "raw_contacts1." + RawContacts.CONTACT_ID,
                "raw_contacts1." + RawContactsColumns.ACCOUNT_ID,
                "raw_contacts1." + RawContactsColumns.AGGREGATION_NEEDED,
                AggregationExceptions.RAW_CONTACT_ID2,
                "raw_contacts2." + RawContacts.CONTACT_ID,
                "raw_contacts2." + RawContactsColumns.ACCOUNT_ID,
                "raw_contacts2." + RawContactsColumns.AGGREGATION_NEEDED,
        };

        int TYPE = 0;
        int RAW_CONTACT_ID1 = 1;
        int CONTACT_ID1 = 2;
        int ACCOUNT_ID1 = 3;
        int AGGREGATION_NEEDED_1 = 4;
        int RAW_CONTACT_ID2 = 5;
        int CONTACT_ID2 = 6;
        int ACCOUNT_ID2 = 7;
        int AGGREGATION_NEEDED_2 = 8;
    }

    protected interface NameLookupMatchQueryWithParameter {
        String TABLE = Tables.NAME_LOOKUP
                + " JOIN " + Tables.RAW_CONTACTS +
                " ON (" + NameLookupColumns.RAW_CONTACT_ID + " = "
                        + Tables.RAW_CONTACTS + "." + RawContacts._ID + ")";

        String[] COLUMNS = new String[] {
                RawContacts._ID,
                RawContacts.CONTACT_ID,
                RawContactsColumns.ACCOUNT_ID,
                NameLookupColumns.NORMALIZED_NAME,
                NameLookupColumns.NAME_TYPE,
        };

        int RAW_CONTACT_ID = 0;
        int CONTACT_ID = 1;
        int ACCOUNT_ID = 2;
        int NAME = 3;
        int NAME_TYPE = 4;
    }

    protected final class NameLookupSelectionBuilder extends NameLookupBuilder {

        private final MatchCandidateList mNameLookupCandidates;

        private StringBuilder mSelection = new StringBuilder(
                NameLookupColumns.NORMALIZED_NAME + " IN(");


        public NameLookupSelectionBuilder(NameSplitter splitter, MatchCandidateList candidates) {
            super(splitter);
            this.mNameLookupCandidates = candidates;
        }

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

        @Override
        protected void insertNameLookup(
                long rawContactId, long dataId, int lookupType, String string) {
            mNameLookupCandidates.add(string, lookupType);
            DatabaseUtils.appendEscapedSQLString(mSelection, string);
            mSelection.append(',');
        }

        public boolean isEmpty() {
            return mNameLookupCandidates.isEmpty();
        }

        public String getSelection() {
            mSelection.setLength(mSelection.length() - 1);      // Strip last comma
            mSelection.append(')');
            return mSelection.toString();
        }

        public int getLookupType(String name) {
            for (int i = 0; i < mNameLookupCandidates.mCount; i++) {
                if (mNameLookupCandidates.mList.get(i).mName.equals(name)) {
                    return mNameLookupCandidates.mList.get(i).mLookupType;
                }
            }
            throw new IllegalStateException();
        }
    }

    /**
     * Finds contacts with names matching the specified name.
     */
    protected final void updateMatchScoresBasedOnNameMatches(SQLiteDatabase db, String query,
            MatchCandidateList candidates, ContactMatcher matcher) {
        candidates.clear();
        NameLookupSelectionBuilder builder = new NameLookupSelectionBuilder(
                mNameSplitter, candidates);
        builder.insertNameLookup(0, 0, query, FullNameStyle.UNDEFINED);
        if (builder.isEmpty()) {
            return;
        }

        Cursor c = db.query(NameLookupMatchQueryWithParameter.TABLE,
                NameLookupMatchQueryWithParameter.COLUMNS, builder.getSelection(), null, null, null,
                null, PRIMARY_HIT_LIMIT_STRING);
        try {
            while (c.moveToNext()) {
                long contactId = c.getLong(NameLookupMatchQueryWithParameter.CONTACT_ID);
                String name = c.getString(NameLookupMatchQueryWithParameter.NAME);
                int nameTypeA = builder.getLookupType(name);
                int nameTypeB = c.getInt(NameLookupMatchQueryWithParameter.NAME_TYPE);
                matcher.matchName(contactId, nameTypeA, name, nameTypeB, name,
                        ContactMatcher.MATCHING_ALGORITHM_EXACT);
                if (nameTypeA == NameLookupType.NICKNAME && nameTypeB == NameLookupType.NICKNAME) {
                    matcher.updateScoreWithNicknameMatch(contactId);
                }
            }
        } finally {
            c.close();
        }
    }

    protected interface EmailLookupQuery {
        String TABLE = Tables.DATA + " dataA"
                + " JOIN " + Tables.DATA + " dataB" +
                " ON dataA." + Email.DATA + "= dataB." + Email.DATA
                + " JOIN " + Tables.RAW_CONTACTS +
                " ON (dataB." + Data.RAW_CONTACT_ID + " = "
                        + Tables.RAW_CONTACTS + "." + RawContacts._ID + ")";

        String SELECTION = "dataA." + Data.RAW_CONTACT_ID + "=?1"
                + " AND dataA." + DataColumns.MIMETYPE_ID + "=?2"
                + " AND dataA." + Email.DATA + " NOT NULL"
                + " AND dataB." + DataColumns.MIMETYPE_ID + "=?2"
                + " AND " + RawContactsColumns.AGGREGATION_NEEDED + "=0"
                + " AND " + RawContacts.CONTACT_ID + " IN " + Tables.DEFAULT_DIRECTORY;

        String[] COLUMNS = new String[] {
                Tables.RAW_CONTACTS + "." + RawContacts._ID,
                RawContacts.CONTACT_ID,
                RawContactsColumns.ACCOUNT_ID
        };

        int RAW_CONTACT_ID = 0;
        int CONTACT_ID = 1;
        int ACCOUNT_ID = 2;
    }

    protected interface PhoneLookupQuery {
        String TABLE = Tables.PHONE_LOOKUP + " phoneA"
                + " JOIN " + Tables.DATA + " dataA"
                + " ON (dataA." + Data._ID + "=phoneA." + PhoneLookupColumns.DATA_ID + ")"
                + " JOIN " + Tables.PHONE_LOOKUP + " phoneB"
                + " ON (phoneA." + PhoneLookupColumns.MIN_MATCH + "="
                        + "phoneB." + PhoneLookupColumns.MIN_MATCH + ")"
                + " JOIN " + Tables.DATA + " dataB"
                + " ON (dataB." + Data._ID + "=phoneB." + PhoneLookupColumns.DATA_ID + ")"
                + " JOIN " + Tables.RAW_CONTACTS
                + " ON (dataB." + Data.RAW_CONTACT_ID + " = "
                        + Tables.RAW_CONTACTS + "." + RawContacts._ID + ")";

        String SELECTION = "dataA." + Data.RAW_CONTACT_ID + "=?"
                + " AND PHONE_NUMBERS_EQUAL(dataA." + Phone.NUMBER + ", "
                        + "dataB." + Phone.NUMBER + ",?)"
                + " AND " + RawContactsColumns.AGGREGATION_NEEDED + "=0"
                + " AND " + RawContacts.CONTACT_ID + " IN " + Tables.DEFAULT_DIRECTORY;

        String[] COLUMNS = new String[] {
                Tables.RAW_CONTACTS + "." + RawContacts._ID,
                RawContacts.CONTACT_ID,
                RawContactsColumns.ACCOUNT_ID
        };

        int RAW_CONTACT_ID = 0;
        int CONTACT_ID = 1;
        int ACCOUNT_ID = 2;
    }

    private interface ContactNameLookupQuery {
        String TABLE = Tables.NAME_LOOKUP_JOIN_RAW_CONTACTS;

        String[] COLUMNS = new String[]{
                RawContacts.CONTACT_ID,
                NameLookupColumns.NORMALIZED_NAME,
                NameLookupColumns.NAME_TYPE
        };

        int CONTACT_ID = 0;
        int NORMALIZED_NAME = 1;
        int NAME_TYPE = 2;
    }

    /**
     * Loads all candidate rows from the name lookup table and updates match scores based
     * on that data.
     */
    private void matchAllCandidates(SQLiteDatabase db, String selection,
            MatchCandidateList candidates, ContactMatcher matcher, int algorithm, String limit) {
        final Cursor c = db.query(ContactNameLookupQuery.TABLE, ContactNameLookupQuery.COLUMNS,
                selection, null, null, null, null, limit);

        try {
            while (c.moveToNext()) {
                Long contactId = c.getLong(ContactNameLookupQuery.CONTACT_ID);
                String name = c.getString(ContactNameLookupQuery.NORMALIZED_NAME);
                int nameType = c.getInt(ContactNameLookupQuery.NAME_TYPE);

                // Note the N^2 complexity of the following fragment. This is not a huge concern
                // since the number of candidates is very small and in general secondary hits
                // in the absence of primary hits are rare.
                for (int i = 0; i < candidates.mCount; i++) {
                    NameMatchCandidate candidate = candidates.mList.get(i);
                    matcher.matchName(contactId, candidate.mLookupType, candidate.mName,
                            nameType, name, algorithm);
                }
            }
        } finally {
            c.close();
        }
    }

    private interface RawContactsQuery {
        String SQL_FORMAT_HAS_SUPER_PRIMARY_NAME =
                " EXISTS(SELECT 1 " +
                        " FROM " + Tables.DATA + " d " +
                        " WHERE d." + DataColumns.MIMETYPE_ID + "=%d " +
                        " AND d." + Data.RAW_CONTACT_ID + "=" + RawContactsColumns.CONCRETE_ID +
                        " AND d." + Data.IS_SUPER_PRIMARY + "=1)";

        String SQL_FORMAT =
                "SELECT "
                        + RawContactsColumns.CONCRETE_ID + ","
                        + RawContactsColumns.DISPLAY_NAME + ","
                        + RawContactsColumns.DISPLAY_NAME_SOURCE + ","
                        + AccountsColumns.CONCRETE_ACCOUNT_TYPE + ","
                        + AccountsColumns.CONCRETE_ACCOUNT_NAME + ","
                        + AccountsColumns.CONCRETE_DATA_SET + ","
                        + RawContacts.SOURCE_ID + ","
                        + RawContacts.CUSTOM_RINGTONE + ","
                        + RawContacts.SEND_TO_VOICEMAIL + ","
                        + RawContacts.RAW_LAST_TIME_CONTACTED + ","
                        + RawContacts.RAW_TIMES_CONTACTED + ","
                        + RawContacts.STARRED + ","
                        + RawContacts.PINNED + ","
                        + DataColumns.CONCRETE_ID + ","
                        + DataColumns.CONCRETE_MIMETYPE_ID + ","
                        + Data.IS_SUPER_PRIMARY + ","
                        + Photo.PHOTO_FILE_ID + ","
                        + SQL_FORMAT_HAS_SUPER_PRIMARY_NAME +
                " FROM " + Tables.RAW_CONTACTS +
                " JOIN " + Tables.ACCOUNTS + " ON ("
                    + AccountsColumns.CONCRETE_ID + "=" + RawContactsColumns.CONCRETE_ACCOUNT_ID
                    + ")" +
                " LEFT OUTER JOIN " + Tables.DATA +
                " ON (" + DataColumns.CONCRETE_RAW_CONTACT_ID + "=" + RawContactsColumns.CONCRETE_ID
                        + " AND ((" + DataColumns.MIMETYPE_ID + "=%d"
                                + " AND " + Photo.PHOTO + " NOT NULL)"
                        + " OR (" + DataColumns.MIMETYPE_ID + "=%d"
                                + " AND " + Phone.NUMBER + " NOT NULL)))";

        String SQL_FORMAT_BY_RAW_CONTACT_ID = SQL_FORMAT +
                " WHERE " + RawContactsColumns.CONCRETE_ID + "=?";

        String SQL_FORMAT_BY_CONTACT_ID = SQL_FORMAT +
                " WHERE " + RawContacts.CONTACT_ID + "=?"
                + " AND " + RawContacts.DELETED + "=0";

        int RAW_CONTACT_ID = 0;
        int DISPLAY_NAME = 1;
        int DISPLAY_NAME_SOURCE = 2;
        int ACCOUNT_TYPE = 3;
        int ACCOUNT_NAME = 4;
        int DATA_SET = 5;
        int SOURCE_ID = 6;
        int CUSTOM_RINGTONE = 7;
        int SEND_TO_VOICEMAIL = 8;
        int RAW_LAST_TIME_CONTACTED = 9;
        int RAW_TIMES_CONTACTED = 10;
        int STARRED = 11;
        int PINNED = 12;
        int DATA_ID = 13;
        int MIMETYPE_ID = 14;
        int IS_SUPER_PRIMARY = 15;
        int PHOTO_FILE_ID = 16;
        int HAS_SUPER_PRIMARY_NAME = 17;
    }

    protected interface ContactReplaceSqlStatement {
        String UPDATE_SQL =
                "UPDATE " + Tables.CONTACTS +
                " SET "
                        + Contacts.NAME_RAW_CONTACT_ID + "=?, "
                        + Contacts.PHOTO_ID + "=?, "
                        + Contacts.PHOTO_FILE_ID + "=?, "
                        + Contacts.SEND_TO_VOICEMAIL + "=?, "
                        + Contacts.CUSTOM_RINGTONE + "=?, "
                        + Contacts.RAW_LAST_TIME_CONTACTED + "=?, "
                        + Contacts.RAW_TIMES_CONTACTED + "=?, "
                        + Contacts.STARRED + "=?, "
                        + Contacts.PINNED + "=?, "
                        + Contacts.HAS_PHONE_NUMBER + "=?, "
                        + Contacts.LOOKUP_KEY + "=?, "
                        + Contacts.CONTACT_LAST_UPDATED_TIMESTAMP + "=? " +
                " WHERE " + Contacts._ID + "=?";

        String INSERT_SQL =
                "INSERT INTO " + Tables.CONTACTS + " ("
                        + Contacts.NAME_RAW_CONTACT_ID + ", "
                        + Contacts.PHOTO_ID + ", "
                        + Contacts.PHOTO_FILE_ID + ", "
                        + Contacts.SEND_TO_VOICEMAIL + ", "
                        + Contacts.CUSTOM_RINGTONE + ", "
                        + Contacts.RAW_LAST_TIME_CONTACTED + ", "
                        + Contacts.RAW_TIMES_CONTACTED + ", "
                        + Contacts.STARRED + ", "
                        + Contacts.PINNED + ", "
                        + Contacts.HAS_PHONE_NUMBER + ", "
                        + Contacts.LOOKUP_KEY + ", "
                        + Contacts.CONTACT_LAST_UPDATED_TIMESTAMP
                        + ") " +
                " VALUES (?,?,?,?,?,?,?,?,?,?,?,?)";

        int NAME_RAW_CONTACT_ID = 1;
        int PHOTO_ID = 2;
        int PHOTO_FILE_ID = 3;
        int SEND_TO_VOICEMAIL = 4;
        int CUSTOM_RINGTONE = 5;
        int RAW_LAST_TIME_CONTACTED = 6;
        int RAW_TIMES_CONTACTED = 7;
        int STARRED = 8;
        int PINNED = 9;
        int HAS_PHONE_NUMBER = 10;
        int LOOKUP_KEY = 11;
        int CONTACT_LAST_UPDATED_TIMESTAMP = 12;
        int CONTACT_ID = 13;
    }

    /**
     * Computes aggregate-level data for the specified aggregate contact ID.
     */
    protected void computeAggregateData(SQLiteDatabase db, long contactId,
            SQLiteStatement statement) {
        mSelectionArgs1[0] = String.valueOf(contactId);
        computeAggregateData(db, mRawContactsQueryByContactId, mSelectionArgs1, statement);
    }

    /**
     * Indicates whether the given photo entry and priority gives this photo a higher overall
     * priority than the current best photo entry and priority.
     */
    private boolean hasHigherPhotoPriority(PhotoEntry photoEntry, int priority,
            PhotoEntry bestPhotoEntry, int bestPriority) {
        int photoComparison = photoEntry.compareTo(bestPhotoEntry);
        return photoComparison < 0 || photoComparison == 0 && priority > bestPriority;
    }

    /**
     * Computes aggregate-level data from constituent raw contacts.
     */
    protected final void computeAggregateData(final SQLiteDatabase db, String sql, String[] sqlArgs,
            SQLiteStatement statement) {
        long currentRawContactId = -1;
        long bestPhotoId = -1;
        long bestPhotoFileId = 0;
        PhotoEntry bestPhotoEntry = null;
        boolean foundSuperPrimaryPhoto = false;
        int photoPriority = -1;
        int totalRowCount = 0;
        int contactSendToVoicemail = 0;
        String contactCustomRingtone = null;
        long contactLastTimeContacted = 0;
        int contactTimesContacted = 0;
        int contactStarred = 0;
        int contactPinned = Integer.MAX_VALUE;
        int hasPhoneNumber = 0;
        StringBuilder lookupKey = new StringBuilder();

        mDisplayNameCandidate.clear();

        Cursor c = db.rawQuery(sql, sqlArgs);
        try {
            while (c.moveToNext()) {
                long rawContactId = c.getLong(RawContactsQuery.RAW_CONTACT_ID);
                if (rawContactId != currentRawContactId) {
                    currentRawContactId = rawContactId;
                    totalRowCount++;

                    // Assemble sub-account.
                    String accountType = c.getString(RawContactsQuery.ACCOUNT_TYPE);
                    String dataSet = c.getString(RawContactsQuery.DATA_SET);
                    String accountWithDataSet = (!TextUtils.isEmpty(dataSet))
                            ? accountType + "/" + dataSet
                            : accountType;

                    // Display name
                    String displayName = c.getString(RawContactsQuery.DISPLAY_NAME);
                    int displayNameSource = c.getInt(RawContactsQuery.DISPLAY_NAME_SOURCE);
                    int isNameSuperPrimary = c.getInt(RawContactsQuery.HAS_SUPER_PRIMARY_NAME);
                    processDisplayNameCandidate(rawContactId, displayName, displayNameSource,
                            mContactsProvider.isWritableAccountWithDataSet(accountWithDataSet),
                            isNameSuperPrimary != 0);

                    // Contact options
                    if (!c.isNull(RawContactsQuery.SEND_TO_VOICEMAIL)) {
                        boolean sendToVoicemail =
                                (c.getInt(RawContactsQuery.SEND_TO_VOICEMAIL) != 0);
                        if (sendToVoicemail) {
                            contactSendToVoicemail++;
                        }
                    }

                    if (contactCustomRingtone == null
                            && !c.isNull(RawContactsQuery.CUSTOM_RINGTONE)) {
                        contactCustomRingtone = c.getString(RawContactsQuery.CUSTOM_RINGTONE);
                    }

                    long lastTimeContacted = c.getLong(RawContactsQuery.RAW_LAST_TIME_CONTACTED);
                    if (lastTimeContacted > contactLastTimeContacted) {
                        contactLastTimeContacted = lastTimeContacted;
                    }

                    int timesContacted = c.getInt(RawContactsQuery.RAW_TIMES_CONTACTED);
                    if (timesContacted > contactTimesContacted) {
                        contactTimesContacted = timesContacted;
                    }

                    if (c.getInt(RawContactsQuery.STARRED) != 0) {
                        contactStarred = 1;
                    }

                    // contactPinned should be the lowest value of its constituent raw contacts,
                    // excluding negative integers
                    final int rawContactPinned = c.getInt(RawContactsQuery.PINNED);
                    if (rawContactPinned > PinnedPositions.UNPINNED) {
                        contactPinned = Math.min(contactPinned, rawContactPinned);
                    }

                    appendLookupKey(
                            lookupKey,
                            accountWithDataSet,
                            c.getString(RawContactsQuery.ACCOUNT_NAME),
                            rawContactId,
                            c.getString(RawContactsQuery.SOURCE_ID),
                            displayName);
                }

                if (!c.isNull(RawContactsQuery.DATA_ID)) {
                    long dataId = c.getLong(RawContactsQuery.DATA_ID);
                    long photoFileId = c.getLong(RawContactsQuery.PHOTO_FILE_ID);
                    int mimetypeId = c.getInt(RawContactsQuery.MIMETYPE_ID);
                    boolean superPrimary = c.getInt(RawContactsQuery.IS_SUPER_PRIMARY) != 0;
                    if (mimetypeId == mMimeTypeIdPhoto) {
                        if (!foundSuperPrimaryPhoto) {
                            // Lookup the metadata for the photo, if available.  Note that data set
                            // does not come into play here, since accounts are looked up in the
                            // account manager in the priority resolver.
                            PhotoEntry photoEntry = getPhotoMetadata(db, photoFileId);
                            String accountType = c.getString(RawContactsQuery.ACCOUNT_TYPE);
                            int priority = mPhotoPriorityResolver.getPhotoPriority(accountType);
                            if (superPrimary || hasHigherPhotoPriority(
                                    photoEntry, priority, bestPhotoEntry, photoPriority)) {
                                bestPhotoEntry = photoEntry;
                                photoPriority = priority;
                                bestPhotoId = dataId;
                                bestPhotoFileId = photoFileId;
                                foundSuperPrimaryPhoto |= superPrimary;
                            }
                        }
                    } else if (mimetypeId == mMimeTypeIdPhone) {
                        hasPhoneNumber = 1;
                    }
                }
            }
        } finally {
            c.close();
        }

        if (contactPinned == Integer.MAX_VALUE) {
            contactPinned = PinnedPositions.UNPINNED;
        }

        statement.bindLong(ContactReplaceSqlStatement.NAME_RAW_CONTACT_ID,
                mDisplayNameCandidate.rawContactId);

        if (bestPhotoId != -1) {
            statement.bindLong(ContactReplaceSqlStatement.PHOTO_ID, bestPhotoId);
        } else {
            statement.bindNull(ContactReplaceSqlStatement.PHOTO_ID);
        }

        if (bestPhotoFileId != 0) {
            statement.bindLong(ContactReplaceSqlStatement.PHOTO_FILE_ID, bestPhotoFileId);
        } else {
            statement.bindNull(ContactReplaceSqlStatement.PHOTO_FILE_ID);
        }

        statement.bindLong(ContactReplaceSqlStatement.SEND_TO_VOICEMAIL,
                totalRowCount == contactSendToVoicemail ? 1 : 0);
        DatabaseUtils.bindObjectToProgram(statement, ContactReplaceSqlStatement.CUSTOM_RINGTONE,
                contactCustomRingtone);
        statement.bindLong(ContactReplaceSqlStatement.RAW_LAST_TIME_CONTACTED,
                contactLastTimeContacted);
        statement.bindLong(ContactReplaceSqlStatement.RAW_TIMES_CONTACTED,
                contactTimesContacted);
        statement.bindLong(ContactReplaceSqlStatement.STARRED,
                contactStarred);
        statement.bindLong(ContactReplaceSqlStatement.PINNED,
                contactPinned);
        statement.bindLong(ContactReplaceSqlStatement.HAS_PHONE_NUMBER,
                hasPhoneNumber);
        statement.bindString(ContactReplaceSqlStatement.LOOKUP_KEY,
                Uri.encode(lookupKey.toString()));
        statement.bindLong(ContactReplaceSqlStatement.CONTACT_LAST_UPDATED_TIMESTAMP,
                Clock.getInstance().currentTimeMillis());
    }

    /**
     * Builds a lookup key using the given data.
     */
    // Overridden by ProfileAggregator.
    protected void appendLookupKey(StringBuilder sb, String accountTypeWithDataSet,
            String accountName, long rawContactId, String sourceId, String displayName) {
        ContactLookupKey.appendToLookupKey(sb, accountTypeWithDataSet, accountName, rawContactId,
                sourceId, displayName);
    }

    /**
     * Uses the supplied values to determine if they represent a "better" display name
     * for the aggregate contact currently evaluated.  If so, it updates
     * {@link #mDisplayNameCandidate} with the new values.
     */
    private void processDisplayNameCandidate(long rawContactId, String displayName,
            int displayNameSource, boolean writableAccount, boolean isNameSuperPrimary) {

        boolean replace = false;
        if (mDisplayNameCandidate.rawContactId == -1) {
            // No previous values available
            replace = true;
        } else if (!TextUtils.isEmpty(displayName)) {
            if (isNameSuperPrimary) {
                // A super primary name is better than any other name
                replace = true;
            } else if (mDisplayNameCandidate.isNameSuperPrimary == isNameSuperPrimary) {
                if (mDisplayNameCandidate.displayNameSource < displayNameSource) {
                    // New values come from an superior source, e.g. structured name vs phone number
                    replace = true;
                } else if (mDisplayNameCandidate.displayNameSource == displayNameSource) {
                    if (!mDisplayNameCandidate.writableAccount && writableAccount) {
                        replace = true;
                    } else if (mDisplayNameCandidate.writableAccount == writableAccount) {
                        if (NameNormalizer.compareComplexity(displayName,
                                mDisplayNameCandidate.displayName) > 0) {
                            // New name is more complex than the previously found one
                            replace = true;
                        }
                    }
                }
            }
        }

        if (replace) {
            mDisplayNameCandidate.rawContactId = rawContactId;
            mDisplayNameCandidate.displayName = displayName;
            mDisplayNameCandidate.displayNameSource = displayNameSource;
            mDisplayNameCandidate.isNameSuperPrimary = isNameSuperPrimary;
            mDisplayNameCandidate.writableAccount = writableAccount;
        }
    }

    private interface PhotoIdQuery {
        final String[] COLUMNS = new String[] {
            AccountsColumns.CONCRETE_ACCOUNT_TYPE,
            DataColumns.CONCRETE_ID,
            Data.IS_SUPER_PRIMARY,
            Photo.PHOTO_FILE_ID,
        };

        int ACCOUNT_TYPE = 0;
        int DATA_ID = 1;
        int IS_SUPER_PRIMARY = 2;
        int PHOTO_FILE_ID = 3;
    }

    public final void updatePhotoId(SQLiteDatabase db, long rawContactId) {

        long contactId = mDbHelper.getContactId(rawContactId);
        if (contactId == 0) {
            return;
        }

        long bestPhotoId = -1;
        long bestPhotoFileId = 0;
        int photoPriority = -1;

        long photoMimeType = mDbHelper.getMimeTypeId(Photo.CONTENT_ITEM_TYPE);

        String tables = Tables.RAW_CONTACTS
                + " JOIN " + Tables.ACCOUNTS + " ON ("
                    + AccountsColumns.CONCRETE_ID + "=" + RawContactsColumns.CONCRETE_ACCOUNT_ID
                    + ")"
                + " JOIN " + Tables.DATA + " ON("
                + DataColumns.CONCRETE_RAW_CONTACT_ID + "=" + RawContactsColumns.CONCRETE_ID
                + " AND (" + DataColumns.MIMETYPE_ID + "=" + photoMimeType + " AND "
                        + Photo.PHOTO + " NOT NULL))";

        mSelectionArgs1[0] = String.valueOf(contactId);
        final Cursor c = db.query(tables, PhotoIdQuery.COLUMNS,
                RawContacts.CONTACT_ID + "=?", mSelectionArgs1, null, null, null);
        try {
            PhotoEntry bestPhotoEntry = null;
            while (c.moveToNext()) {
                long dataId = c.getLong(PhotoIdQuery.DATA_ID);
                long photoFileId = c.getLong(PhotoIdQuery.PHOTO_FILE_ID);
                boolean superPrimary = c.getInt(PhotoIdQuery.IS_SUPER_PRIMARY) != 0;
                PhotoEntry photoEntry = getPhotoMetadata(db, photoFileId);

                // Note that data set does not come into play here, since accounts are looked up in
                // the account manager in the priority resolver.
                String accountType = c.getString(PhotoIdQuery.ACCOUNT_TYPE);
                int priority = mPhotoPriorityResolver.getPhotoPriority(accountType);
                if (superPrimary || hasHigherPhotoPriority(
                        photoEntry, priority, bestPhotoEntry, photoPriority)) {
                    bestPhotoEntry = photoEntry;
                    photoPriority = priority;
                    bestPhotoId = dataId;
                    bestPhotoFileId = photoFileId;
                    if (superPrimary) {
                        break;
                    }
                }
            }
        } finally {
            c.close();
        }

        if (bestPhotoId == -1) {
            mPhotoIdUpdate.bindNull(1);
        } else {
            mPhotoIdUpdate.bindLong(1, bestPhotoId);
        }

        if (bestPhotoFileId == 0) {
            mPhotoIdUpdate.bindNull(2);
        } else {
            mPhotoIdUpdate.bindLong(2, bestPhotoFileId);
        }

        mPhotoIdUpdate.bindLong(3, contactId);
        mPhotoIdUpdate.execute();
    }

    private interface PhotoFileQuery {
        final String[] COLUMNS = new String[] {
                PhotoFiles.HEIGHT,
                PhotoFiles.WIDTH,
                PhotoFiles.FILESIZE
        };

        int HEIGHT = 0;
        int WIDTH = 1;
        int FILESIZE = 2;
    }

    private class PhotoEntry implements Comparable<PhotoEntry> {
        // Pixel count (width * height) for the image.
        final int pixelCount;

        // File size (in bytes) of the image.  Not populated if the image is a thumbnail.
        final int fileSize;

        private PhotoEntry(int pixelCount, int fileSize) {
            this.pixelCount = pixelCount;
            this.fileSize = fileSize;
        }

        @Override
        public int compareTo(PhotoEntry pe) {
            if (pe == null) {
                return -1;
            }
            if (pixelCount == pe.pixelCount) {
                return pe.fileSize - fileSize;
            } else {
                return pe.pixelCount - pixelCount;
            }
        }
    }

    private PhotoEntry getPhotoMetadata(SQLiteDatabase db, long photoFileId) {
        if (photoFileId == 0) {
            // Assume standard thumbnail size.  Don't bother getting a file size for priority;
            // we should fall back to photo priority resolver if all we have are thumbnails.
            int thumbDim = mContactsProvider.getMaxThumbnailDim();
            return new PhotoEntry(thumbDim * thumbDim, 0);
        } else {
            Cursor c = db.query(Tables.PHOTO_FILES, PhotoFileQuery.COLUMNS, PhotoFiles._ID + "=?",
                    new String[]{String.valueOf(photoFileId)}, null, null, null);
            try {
                if (c.getCount() == 1) {
                    c.moveToFirst();
                    int pixelCount =
                            c.getInt(PhotoFileQuery.HEIGHT) * c.getInt(PhotoFileQuery.WIDTH);
                    return new PhotoEntry(pixelCount, c.getInt(PhotoFileQuery.FILESIZE));
                }
            } finally {
                c.close();
            }
        }
        return new PhotoEntry(0, 0);
    }

    private interface DisplayNameQuery {
        String SQL_HAS_SUPER_PRIMARY_NAME =
                " EXISTS(SELECT 1 " +
                        " FROM " + Tables.DATA + " d " +
                        " WHERE d." + DataColumns.MIMETYPE_ID + "=? " +
                        " AND d." + Data.RAW_CONTACT_ID + "=" + Views.RAW_CONTACTS
                        + "." + RawContacts._ID +
                        " AND d." + Data.IS_SUPER_PRIMARY + "=1)";

        String SQL =
                "SELECT "
                        + RawContacts._ID + ","
                        + RawContactsColumns.DISPLAY_NAME + ","
                        + RawContactsColumns.DISPLAY_NAME_SOURCE + ","
                        + SQL_HAS_SUPER_PRIMARY_NAME + ","
                        + RawContacts.SOURCE_ID + ","
                        + RawContacts.ACCOUNT_TYPE_AND_DATA_SET +
                " FROM " + Views.RAW_CONTACTS +
                " WHERE " + RawContacts.CONTACT_ID + "=? ";

        int _ID = 0;
        int DISPLAY_NAME = 1;
        int DISPLAY_NAME_SOURCE = 2;
        int HAS_SUPER_PRIMARY_NAME = 3;
        int SOURCE_ID = 4;
        int ACCOUNT_TYPE_AND_DATA_SET = 5;
    }

    public final void updateDisplayNameForRawContact(SQLiteDatabase db, long rawContactId) {
        long contactId = mDbHelper.getContactId(rawContactId);
        if (contactId == 0) {
            return;
        }

        updateDisplayNameForContact(db, contactId);
    }

    public final void updateDisplayNameForContact(SQLiteDatabase db, long contactId) {
        boolean lookupKeyUpdateNeeded = false;

        mDisplayNameCandidate.clear();

        mSelectionArgs2[0] = String.valueOf(mDbHelper.getMimeTypeIdForStructuredName());
        mSelectionArgs2[1] = String.valueOf(contactId);
        final Cursor c = db.rawQuery(DisplayNameQuery.SQL, mSelectionArgs2);
        try {
            while (c.moveToNext()) {
                long rawContactId = c.getLong(DisplayNameQuery._ID);
                String displayName = c.getString(DisplayNameQuery.DISPLAY_NAME);
                int displayNameSource = c.getInt(DisplayNameQuery.DISPLAY_NAME_SOURCE);
                int isNameSuperPrimary = c.getInt(DisplayNameQuery.HAS_SUPER_PRIMARY_NAME);
                String accountTypeAndDataSet = c.getString(
                        DisplayNameQuery.ACCOUNT_TYPE_AND_DATA_SET);
                processDisplayNameCandidate(rawContactId, displayName, displayNameSource,
                        mContactsProvider.isWritableAccountWithDataSet(accountTypeAndDataSet),
                        isNameSuperPrimary != 0);

                // If the raw contact has no source id, the lookup key is based on the display
                // name, so the lookup key needs to be updated.
                lookupKeyUpdateNeeded |= c.isNull(DisplayNameQuery.SOURCE_ID);
            }
        } finally {
            c.close();
        }

        if (mDisplayNameCandidate.rawContactId != -1) {
            mDisplayNameUpdate.bindLong(1, mDisplayNameCandidate.rawContactId);
            mDisplayNameUpdate.bindLong(2, contactId);
            mDisplayNameUpdate.execute();
        }

        if (lookupKeyUpdateNeeded) {
            updateLookupKeyForContact(db, contactId);
        }
    }


    /**
     * Updates the {@link Contacts#HAS_PHONE_NUMBER} flag for the aggregate contact containing the
     * specified raw contact.
     */
    public final void updateHasPhoneNumber(SQLiteDatabase db, long rawContactId) {

        long contactId = mDbHelper.getContactId(rawContactId);
        if (contactId == 0) {
            return;
        }

        final SQLiteStatement hasPhoneNumberUpdate = db.compileStatement(
                "UPDATE " + Tables.CONTACTS +
                " SET " + Contacts.HAS_PHONE_NUMBER + "="
                        + "(SELECT (CASE WHEN COUNT(*)=0 THEN 0 ELSE 1 END)"
                        + " FROM " + Tables.DATA_JOIN_RAW_CONTACTS
                        + " WHERE " + DataColumns.MIMETYPE_ID + "=?"
                                + " AND " + Phone.NUMBER + " NOT NULL"
                                + " AND " + RawContacts.CONTACT_ID + "=?)" +
                " WHERE " + Contacts._ID + "=?");
        try {
            hasPhoneNumberUpdate.bindLong(1, mDbHelper.getMimeTypeId(Phone.CONTENT_ITEM_TYPE));
            hasPhoneNumberUpdate.bindLong(2, contactId);
            hasPhoneNumberUpdate.bindLong(3, contactId);
            hasPhoneNumberUpdate.execute();
        } finally {
            hasPhoneNumberUpdate.close();
        }
    }

    private interface LookupKeyQuery {
        String TABLE = Views.RAW_CONTACTS;
        String[] COLUMNS = new String[] {
            RawContacts._ID,
            RawContactsColumns.DISPLAY_NAME,
            RawContacts.ACCOUNT_TYPE_AND_DATA_SET,
            RawContacts.ACCOUNT_NAME,
            RawContacts.SOURCE_ID,
        };

        int ID = 0;
        int DISPLAY_NAME = 1;
        int ACCOUNT_TYPE_AND_DATA_SET = 2;
        int ACCOUNT_NAME = 3;
        int SOURCE_ID = 4;
    }

    public final void updateLookupKeyForRawContact(SQLiteDatabase db, long rawContactId) {
        long contactId = mDbHelper.getContactId(rawContactId);
        if (contactId == 0) {
            return;
        }

        updateLookupKeyForContact(db, contactId);
    }

    private void updateLookupKeyForContact(SQLiteDatabase db, long contactId) {
        String lookupKey = computeLookupKeyForContact(db, contactId);

        if (lookupKey == null) {
            mLookupKeyUpdate.bindNull(1);
        } else {
            mLookupKeyUpdate.bindString(1, Uri.encode(lookupKey));
        }
        mLookupKeyUpdate.bindLong(2, contactId);

        mLookupKeyUpdate.execute();
    }

    // Overridden by ProfileAggregator.
    protected String computeLookupKeyForContact(SQLiteDatabase db, long contactId) {
        StringBuilder sb = new StringBuilder();
        mSelectionArgs1[0] = String.valueOf(contactId);
        final Cursor c = db.query(LookupKeyQuery.TABLE, LookupKeyQuery.COLUMNS,
                RawContacts.CONTACT_ID + "=?", mSelectionArgs1, null, null, RawContacts._ID);
        try {
            while (c.moveToNext()) {
                ContactLookupKey.appendToLookupKey(sb,
                        c.getString(LookupKeyQuery.ACCOUNT_TYPE_AND_DATA_SET),
                        c.getString(LookupKeyQuery.ACCOUNT_NAME),
                        c.getLong(LookupKeyQuery.ID),
                        c.getString(LookupKeyQuery.SOURCE_ID),
                        c.getString(LookupKeyQuery.DISPLAY_NAME));
            }
        } finally {
            c.close();
        }
        return sb.length() == 0 ? null : sb.toString();
    }

    /**
     * Execute {@link SQLiteStatement} that will update the
     * {@link Contacts#STARRED} flag for the given {@link RawContacts#_ID}.
     */
    public final void updateStarred(long rawContactId) {
        long contactId = mDbHelper.getContactId(rawContactId);
        if (contactId == 0) {
            return;
        }

        mStarredUpdate.bindLong(1, contactId);
        mStarredUpdate.execute();
    }

    /**
     * Execute {@link SQLiteStatement} that will update the
     * {@link Contacts#SEND_TO_VOICEMAIL} flag for the given {@link RawContacts#_ID}.
     */
    public final void updateSendToVoicemail(long rawContactId) {
        long contactId = mDbHelper.getContactId(rawContactId);
        if (contactId == 0) {
            return;
        }

        mSendToVoicemailUpdate.bindLong(1, contactId);
        mSendToVoicemailUpdate.execute();
    }

    /**
     * Execute {@link SQLiteStatement} that will update the
     * {@link Contacts#PINNED} flag for the given {@link RawContacts#_ID}.
     */
    public final void updatePinned(long rawContactId) {
        long contactId = mDbHelper.getContactId(rawContactId);
        if (contactId == 0) {
            return;
        }
        mPinnedUpdate.bindLong(1, contactId);
        mPinnedUpdate.execute();
    }

    /**
     * Finds matching contacts and returns a cursor on those.
     */
    public final Cursor queryAggregationSuggestions(SQLiteQueryBuilder qb,
            String[] projection, long contactId, int maxSuggestions, String filter,
            ArrayList<AggregationSuggestionParameter> parameters) {
        final SQLiteDatabase db = mDbHelper.getReadableDatabase();
        db.beginTransaction();
        try {
            List<MatchScore> bestMatches = findMatchingContacts(db, contactId, parameters);
            List<MatchScore> bestMatchesWithoutDuplicateContactIds = new ArrayList<>();
            Set<Long> contactIds = new ArraySet<>();
            for (MatchScore bestMatch : bestMatches) {
                long cid = bestMatch.getContactId();
                if (!contactIds.contains(cid) && cid != contactId) {
                    bestMatchesWithoutDuplicateContactIds.add(bestMatch);
                    contactIds.add(cid);
                }
            }
            return queryMatchingContacts(qb, db, projection, bestMatchesWithoutDuplicateContactIds,
                    maxSuggestions, filter);
        } finally {
            db.endTransaction();
        }
    }

    private interface ContactIdQuery {
        String[] COLUMNS = new String[] {
            Contacts._ID
        };

        int _ID = 0;
    }

    /**
     * Loads contacts with specified IDs and returns them in the order of IDs in the
     * supplied list.
     */
    private Cursor queryMatchingContacts(SQLiteQueryBuilder qb, SQLiteDatabase db,
            String[] projection, List<MatchScore> bestMatches, int maxSuggestions, String filter) {
        StringBuilder sb = new StringBuilder();
        sb.append(Contacts._ID);
        sb.append(" IN (");
        for (int i = 0; i < bestMatches.size(); i++) {
            MatchScore matchScore = bestMatches.get(i);
            if (i != 0) {
                sb.append(",");
            }
            sb.append(matchScore.getContactId());
        }
        sb.append(")");

        if (!TextUtils.isEmpty(filter)) {
            sb.append(" AND " + Contacts._ID + " IN ");
            mContactsProvider.appendContactFilterAsNestedQuery(sb, filter);
        }

        // Run a query and find ids of best matching contacts satisfying the filter (if any)
        ArraySet<Long> foundIds = new ArraySet<Long>();
        Cursor cursor = db.query(qb.getTables(), ContactIdQuery.COLUMNS, sb.toString(),
                null, null, null, null);
        try {
            while(cursor.moveToNext()) {
                foundIds.add(cursor.getLong(ContactIdQuery._ID));
            }
        } finally {
            cursor.close();
        }

        // Exclude all contacts that did not match the filter
        Iterator<MatchScore> iter = bestMatches.iterator();
        while (iter.hasNext()) {
            long id = iter.next().getContactId();
            if (!foundIds.contains(id)) {
                iter.remove();
            }
        }

        // Limit the number of returned suggestions
        final List<MatchScore> limitedMatches;
        if (bestMatches.size() > maxSuggestions) {
            limitedMatches = bestMatches.subList(0, maxSuggestions);
        } else {
            limitedMatches = bestMatches;
        }

        // Build an in-clause with the remaining contact IDs
        sb.setLength(0);
        sb.append(Contacts._ID);
        sb.append(" IN (");
        for (int i = 0; i < limitedMatches.size(); i++) {
            MatchScore matchScore = limitedMatches.get(i);
            if (i != 0) {
                sb.append(",");
            }
            sb.append(matchScore.getContactId());
        }
        sb.append(")");

        // Run the final query with the required projection and contact IDs found by the first query
        cursor = qb.query(db, projection, sb.toString(), null, null, null, Contacts._ID);

        // Build a sorted list of discovered IDs
        ArrayList<Long> sortedContactIds = new ArrayList<Long>(limitedMatches.size());
        for (MatchScore matchScore : limitedMatches) {
            sortedContactIds.add(matchScore.getContactId());
        }

        Collections.sort(sortedContactIds);

        // Map cursor indexes according to the descending order of match scores
        int[] positionMap = new int[limitedMatches.size()];
        for (int i = 0; i < positionMap.length; i++) {
            long id = limitedMatches.get(i).getContactId();
            positionMap[i] = sortedContactIds.indexOf(id);
        }

        return new ReorderingCursorWrapper(cursor, positionMap);
    }

    /**
     * Finds contacts with data matches and returns a list of {@link MatchScore}'s in the
     * descending order of match score.
     * @param parameters
     */
    protected abstract List<MatchScore> findMatchingContacts(final SQLiteDatabase db,
            long contactId, ArrayList<AggregationSuggestionParameter> parameters);

    public abstract void updateAggregationAfterVisibilityChange(long contactId);
}