content: /*
   * Copyright (C) 2014 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.android.ex.chips;
  
  /**
   * Used by the {@link com.android.ex.chips.BaseRecipientAdapter} to handle fetching
   * photos from external sources and caching them for faster lookup later.
   */
  public interface PhotoManager {
  
      /** The number of photos cached in this Adapter. */
      public static final int PHOTO_CACHE_SIZE = 20;
  
      /**
       * Sets the {@link com.android.ex.chips.RecipientEntry}'s photo bytes. If the photo bytes
       * are cached, this action happens immediately. Otherwise, the work to fetch the photo
       * bytes is performed asynchronously before setting the value on the UI thread.<p/>
       *
       * If the photo bytes were fetched asynchronously,
       * {@link PhotoManagerCallback#onPhotoBytesAsynchronouslyPopulated()} is called. This
       * method is not called if the photo bytes have been cached previously (because no
       * asynchronous work was performed). In that case,
       * {@link PhotoManagerCallback#onPhotoBytesPopulated()} is called.
       */
      void populatePhotoBytesAsync(RecipientEntry entry, PhotoManagerCallback callback);
  
      interface PhotoManagerCallback {
          void onPhotoBytesPopulated();
          void onPhotoBytesAsynchronouslyPopulated();
          void onPhotoBytesAsyncLoadFailed();
      }
  }
  