1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.contacts.common.model.account;
18
19import android.content.Context;
20import android.database.Cursor;
21import android.net.Uri;
22import android.provider.BaseColumns;
23import android.provider.ContactsContract;
24import android.provider.ContactsContract.RawContacts;
25import android.text.TextUtils;
26
27import com.google.common.base.Objects;
28
29
30/**
31 * Encapsulates an "account type" string and a "data set" string.
32 */
33public class AccountTypeWithDataSet {
34
35    private static final String[] ID_PROJECTION = new String[] {BaseColumns._ID};
36    private static final Uri RAW_CONTACTS_URI_LIMIT_1 = RawContacts.CONTENT_URI.buildUpon()
37            .appendQueryParameter(ContactsContract.LIMIT_PARAM_KEY, "1").build();
38
39    /** account type.  Can be null for fallback type. */
40    public final String accountType;
41
42    /** dataSet may be null, but never be "". */
43    public final String dataSet;
44
45    private AccountTypeWithDataSet(String accountType, String dataSet) {
46        this.accountType = TextUtils.isEmpty(accountType) ? null : accountType;
47        this.dataSet = TextUtils.isEmpty(dataSet) ? null : dataSet;
48    }
49
50    public static AccountTypeWithDataSet get(String accountType, String dataSet) {
51        return new AccountTypeWithDataSet(accountType, dataSet);
52    }
53
54    /**
55     * Return true if there are any contacts in the database with this account type and data set.
56     * Touches DB. Don't use in the UI thread.
57     */
58    public boolean hasData(Context context) {
59        final String BASE_SELECTION = RawContacts.ACCOUNT_TYPE + " = ?";
60        final String selection;
61        final String[] args;
62        if (TextUtils.isEmpty(dataSet)) {
63            selection = BASE_SELECTION + " AND " + RawContacts.DATA_SET + " IS NULL";
64            args = new String[] {accountType};
65        } else {
66            selection = BASE_SELECTION + " AND " + RawContacts.DATA_SET + " = ?";
67            args = new String[] {accountType, dataSet};
68        }
69
70        final Cursor c = context.getContentResolver().query(RAW_CONTACTS_URI_LIMIT_1,
71                ID_PROJECTION, selection, args, null);
72        if (c == null) return false;
73        try {
74            return c.moveToFirst();
75        } finally {
76            c.close();
77        }
78    }
79
80    @Override
81    public boolean equals(Object o) {
82        if (!(o instanceof AccountTypeWithDataSet)) return false;
83
84        AccountTypeWithDataSet other = (AccountTypeWithDataSet) o;
85        return Objects.equal(accountType, other.accountType)
86                && Objects.equal(dataSet, other.dataSet);
87    }
88
89    @Override
90    public int hashCode() {
91        return (accountType == null ? 0 : accountType.hashCode())
92                ^ (dataSet == null ? 0 : dataSet.hashCode());
93    }
94
95    @Override
96    public String toString() {
97        return "[" + accountType + "/" + dataSet + "]";
98    }
99}
100