GroupMetaDataLoader.java revision be18de05d6f6a107c552e369bce58f51c946fde7 
1/*
2 * Copyright (C) 2010 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 */
16package com.android.contacts;
17
18import android.content.Context;
19import android.content.CursorLoader;
20import android.net.Uri;
21import android.provider.ContactsContract.Groups;
22
23/**
24 * Group meta-data loader. Loads all groups or just a single group from the
25 * database (if given a {@link Uri}).
26 */
27public final class GroupMetaDataLoader extends CursorLoader {
28
29    private final static String[] COLUMNS = new String[] {
30        Groups.ACCOUNT_NAME,
31        Groups.ACCOUNT_TYPE,
32        Groups._ID,
33        Groups.TITLE,
34        Groups.AUTO_ADD,
35        Groups.FAVORITES,
36    };
37
38    public final static int ACCOUNT_NAME = 0;
39    public final static int ACCOUNT_TYPE = 1;
40    public final static int GROUP_ID = 2;
41    public final static int TITLE = 3;
42    public final static int AUTO_ADD = 4;
43    public final static int FAVORITES = 5;
44
45    public GroupMetaDataLoader(Context context, Uri groupUri) {
46        super(context, ensureIsGroupUri(groupUri), COLUMNS, Groups.ACCOUNT_TYPE + " NOT NULL AND "
47                + Groups.ACCOUNT_NAME + " NOT NULL", null, null);
48    }
49
50    /**
51     * Ensures that this is a valid group URI. If invalid, then an exception is
52     * thrown. Otherwise, the original URI is returned.
53     */
54    private static Uri ensureIsGroupUri(final Uri groupUri) {
55        // TODO: Fix ContactsProvider2 getType method to resolve the group Uris
56        if (groupUri == null) {
57            throw new IllegalArgumentException("Uri must not be null");
58        }
59        if (!groupUri.toString().startsWith(Groups.CONTENT_URI.toString())) {
60            throw new IllegalArgumentException("Invalid group Uri: " + groupUri);
61        }
62        return groupUri;
63    }
64}
65