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      1 /*
      2  * Copyright (C) 2015 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 package com.android.messaging.datamodel.media;
     17 
     18 import android.util.SparseArray;
     19 
     20 import com.android.messaging.Factory;
     21 import com.android.messaging.datamodel.MemoryCacheManager;
     22 import com.android.messaging.datamodel.MemoryCacheManager.MemoryCache;
     23 import com.android.messaging.datamodel.media.PoolableImageCache.ReusableImageResourcePool;
     24 
     25 /**
     26  * Manages a set of media caches by id.
     27  */
     28 public abstract class MediaCacheManager implements MemoryCache {
     29     public static MediaCacheManager get() {
     30         return Factory.get().getMediaCacheManager();
     31     }
     32 
     33     protected final SparseArray<MediaCache<?>> mCaches;
     34 
     35     public MediaCacheManager() {
     36         mCaches = new SparseArray<MediaCache<?>>();
     37         MemoryCacheManager.get().registerMemoryCache(this);
     38     }
     39 
     40     @Override
     41     public void reclaim() {
     42         final int count = mCaches.size();
     43         for (int i = 0; i < count; i++) {
     44             mCaches.valueAt(i).destroy();
     45         }
     46         mCaches.clear();
     47     }
     48 
     49     public synchronized MediaCache<?> getOrCreateMediaCacheById(final int id) {
     50         MediaCache<?> cache = mCaches.get(id);
     51         if (cache == null) {
     52             cache = createMediaCacheById(id);
     53             if (cache != null) {
     54                 mCaches.put(id, cache);
     55             }
     56         }
     57         return cache;
     58     }
     59 
     60     public ReusableImageResourcePool getOrCreateBitmapPoolForCache(final int cacheId) {
     61         final MediaCache<?> cache = getOrCreateMediaCacheById(cacheId);
     62         if (cache != null && cache instanceof PoolableImageCache) {
     63             return ((PoolableImageCache) cache).asReusableBitmapPool();
     64         }
     65         return null;
     66     }
     67 
     68     protected abstract MediaCache<?> createMediaCacheById(final int id);
     69 }