1/*
2 * Copyright (C) 2008 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 android.test.mock;
18
19import android.content.ContentProvider;
20import android.content.ContentResolver;
21import android.content.Context;
22import android.content.IContentProvider;
23import android.database.ContentObserver;
24import android.net.Uri;
25
26import com.google.android.collect.Maps;
27
28import java.util.Map;
29
30/**
31 * <p>
32 *      An extension of {@link android.content.ContentResolver} that is designed for
33 *      testing.
34 * </p>
35 * <p>
36 *      MockContentResolver overrides Android's normal way of resolving providers by
37 *      authority. To have access to a provider based on its authority, users of
38 *      MockContentResolver first instantiate the provider and
39 *      use {@link MockContentResolver#addProvider(String, ContentProvider)}. Resolution of an
40 *      authority occurs entirely within MockContentResolver.
41 * </p>
42 * <p>
43 *      Users can also set an authority's entry in the map to null, so that a provider is completely
44 *      mocked out.
45 * </p>
46 *
47 * <div class="special reference">
48 * <h3>Developer Guides</h3>
49 * <p>For more information about application testing, read the
50 * <a href="{@docRoot}guide/topics/testing/index.html">Testing</a> developer guide.</p>
51 * </div>
52 */
53
54public class MockContentResolver extends ContentResolver {
55    Map<String, ContentProvider> mProviders;
56
57    /*
58     * Creates a local map of providers. This map is used instead of the global map when an
59     * API call tries to acquire a provider.
60     */
61    public MockContentResolver() {
62        super(null);
63        mProviders = Maps.newHashMap();
64    }
65
66    /**
67     * Adds access to a provider based on its authority
68     *
69     * @param name The authority name associated with the provider.
70     * @param provider An instance of {@link android.content.ContentProvider} or one of its
71     * subclasses, or null.
72     */
73    public void addProvider(String name, ContentProvider provider) {
74
75        /*
76         * Maps the authority to the provider locally.
77         */
78        mProviders.put(name, provider);
79    }
80
81    /** @hide */
82    @Override
83    protected IContentProvider acquireProvider(Context context, String name) {
84        return acquireExistingProvider(context, name);
85    }
86
87    /** @hide */
88    @Override
89    protected IContentProvider acquireExistingProvider(Context context, String name) {
90
91        /*
92         * Gets the content provider from the local map
93         */
94        final ContentProvider provider = mProviders.get(name);
95
96        if (provider != null) {
97            return provider.getIContentProvider();
98        } else {
99            return null;
100        }
101    }
102
103    /** @hide */
104    @Override
105    public boolean releaseProvider(IContentProvider provider) {
106        return true;
107    }
108
109    /** @hide */
110    @Override
111    protected IContentProvider acquireUnstableProvider(Context c, String name) {
112        return acquireProvider(c, name);
113    }
114
115    /** @hide */
116    @Override
117    public boolean releaseUnstableProvider(IContentProvider icp) {
118        return releaseProvider(icp);
119    }
120
121    /** @hide */
122    @Override
123    public void unstableProviderDied(IContentProvider icp) {
124    }
125
126    /**
127     * Overrides {@link android.content.ContentResolver#notifyChange(Uri, ContentObserver, boolean)
128     * ContentResolver.notifChange(Uri, ContentObserver, boolean)}. All parameters are ignored.
129     * The method hides providers linked to MockContentResolver from other observers in the system.
130     *
131     * @param uri (Ignored) The uri of the content provider.
132     * @param observer (Ignored) The observer that originated the change.
133     * @param syncToNetwork (Ignored) If true, attempt to sync the change to the network.
134     */
135    @Override
136    public void notifyChange(Uri uri,
137            ContentObserver observer,
138            boolean syncToNetwork) {
139    }
140}
141