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 17 package android.test.mock; 18 19 import android.content.ContentProvider; 20 import android.content.ContentResolver; 21 import android.content.Context; 22 import android.content.IContentProvider; 23 import android.database.ContentObserver; 24 import android.net.Uri; 25 26 import com.google.android.collect.Maps; 27 28 import 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 54 public 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