content: /*
   * Copyright (C) 2011 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 android.media;
  
  import android.annotation.UnsupportedAppUsage;
  import android.content.ContentProviderClient;
  import android.content.ContentValues;
  import android.net.Uri;
  import android.os.RemoteException;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  
  /**
   * A MediaScanner helper class which enables us to do lazy insertion on the
   * given provider. This class manages buffers internally and flushes when they
   * are full. Note that you should call flushAll() after using this class.
   * {@hide}
   */
  public class MediaInserter {
      private final HashMap<Uri, List<ContentValues>> mRowMap =
              new HashMap<Uri, List<ContentValues>>();
      private final HashMap<Uri, List<ContentValues>> mPriorityRowMap =
              new HashMap<Uri, List<ContentValues>>();
  
      private final ContentProviderClient mProvider;
      private final int mBufferSizePerUri;
  
      public MediaInserter(ContentProviderClient provider, int bufferSizePerUri) {
          mProvider = provider;
          mBufferSizePerUri = bufferSizePerUri;
      }
  
      public void insert(Uri tableUri, ContentValues values) throws RemoteException {
          insert(tableUri, values, false);
      }
  
      public void insertwithPriority(Uri tableUri, ContentValues values) throws RemoteException {
          insert(tableUri, values, true);
      }
  
      private void insert(Uri tableUri, ContentValues values, boolean priority) throws RemoteException {
          HashMap<Uri, List<ContentValues>> rowmap = priority ? mPriorityRowMap : mRowMap;
          List<ContentValues> list = rowmap.get(tableUri);
          if (list == null) {
              list = new ArrayList<ContentValues>();
              rowmap.put(tableUri, list);
          }
          list.add(new ContentValues(values));
          if (list.size() >= mBufferSizePerUri) {
              flushAllPriority();
              flush(tableUri, list);
          }
      }
  
      @UnsupportedAppUsage
      public void flushAll() throws RemoteException {
          flushAllPriority();
          for (Uri tableUri : mRowMap.keySet()){
              List<ContentValues> list = mRowMap.get(tableUri);
              flush(tableUri, list);
          }
          mRowMap.clear();
      }
  
      private void flushAllPriority() throws RemoteException {
          for (Uri tableUri : mPriorityRowMap.keySet()){
              List<ContentValues> list = mPriorityRowMap.get(tableUri);
              flush(tableUri, list);
          }
          mPriorityRowMap.clear();
      }
  
      private void flush(Uri tableUri, List<ContentValues> list) throws RemoteException {
          if (!list.isEmpty()) {
              ContentValues[] valuesArray = new ContentValues[list.size()];
              valuesArray = list.toArray(valuesArray);
              mProvider.bulkInsert(tableUri, valuesArray);
              list.clear();
          }
      }
  }
  