MockContentResolver.java revision 7d433aabb731a790fc8d06d260c826751215113f
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 48public class MockContentResolver extends ContentResolver { 49 Map<String, ContentProvider> mProviders; 50 51 /* 52 * Creates a local map of providers. This map is used instead of the global map when an 53 * API call tries to acquire a provider. 54 */ 55 public MockContentResolver() { 56 super(null); 57 mProviders = Maps.newHashMap(); 58 } 59 60 /** 61 * Adds access to a provider based on its authority 62 * 63 * @param name The authority name associated with the provider. 64 * @param provider An instance of {@link android.content.ContentProvider} or one of its 65 * subclasses, or null. 66 */ 67 public void addProvider(String name, ContentProvider provider) { 68 69 /* 70 * Maps the authority to the provider locally. 71 */ 72 mProviders.put(name, provider); 73 } 74 75 /** @hide */ 76 @Override 77 protected IContentProvider acquireProvider(Context context, String name) { 78 79 /* 80 * Gets the content provider from the local map 81 */ 82 final ContentProvider provider = mProviders.get(name); 83 84 if (provider != null) { 85 return provider.getIContentProvider(); 86 } else { 87 return null; 88 } 89 } 90 91 /** @hide */ 92 @Override 93 public boolean releaseProvider(IContentProvider provider) { 94 return true; 95 } 96 97 /** 98 * Overrides {@link android.content.ContentResolver#notifyChange(Uri, ContentObserver, boolean) 99 * ContentResolver.notifChange(Uri, ContentObserver, boolean)}. All parameters are ignored. 100 * The method hides providers linked to MockContentResolver from other observers in the system. 101 * 102 * @param uri (Ignored) The uri of the content provider. 103 * @param observer (Ignored) The observer that originated the change. 104 * @param syncToNetwork (Ignored) If true, attempt to sync the change to the network. 105 */ 106 @Override 107 public void notifyChange(Uri uri, 108 ContentObserver observer, 109 boolean syncToNetwork) { 110 } 111} 112