content: /*
   * Copyright (C) 2007 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.database;
  
  import android.net.Uri;
  
  /**
   * A specialization of {@link Observable} for {@link ContentObserver}
   * that provides methods for sending notifications to a list of
   * {@link ContentObserver} objects.
   */
  public class ContentObservable extends Observable<ContentObserver> {
      // Even though the generic method defined in Observable would be perfectly
      // fine on its own, we can't delete this overridden method because it would
      // potentially break binary compatibility with existing applications.
      @Override
      public void registerObserver(ContentObserver observer) {
          super.registerObserver(observer);
      }
  
      /**
       * Invokes {@link ContentObserver#dispatchChange(boolean)} on each observer.
       * <p>
       * If <code>selfChange</code> is true, only delivers the notification
       * to the observer if it has indicated that it wants to receive self-change
       * notifications by implementing {@link ContentObserver#deliverSelfNotifications}
       * to return true.
       * </p>
       *
       * @param selfChange True if this is a self-change notification.
       *
       * @deprecated Use {@link #dispatchChange(boolean, Uri)} instead.
       */
      @Deprecated
      public void dispatchChange(boolean selfChange) {
          dispatchChange(selfChange, null);
      }
  
      /**
       * Invokes {@link ContentObserver#dispatchChange(boolean, Uri)} on each observer.
       * Includes the changed content Uri when available.
       * <p>
       * If <code>selfChange</code> is true, only delivers the notification
       * to the observer if it has indicated that it wants to receive self-change
       * notifications by implementing {@link ContentObserver#deliverSelfNotifications}
       * to return true.
       * </p>
       *
       * @param selfChange True if this is a self-change notification.
       * @param uri The Uri of the changed content, or null if unknown.
       */
      public void dispatchChange(boolean selfChange, Uri uri) {
          synchronized(mObservers) {
              for (ContentObserver observer : mObservers) {
                  if (!selfChange || observer.deliverSelfNotifications()) {
                      observer.dispatchChange(selfChange, uri);
                  }
              }
          }
      }
  
      /**
       * Invokes {@link ContentObserver#onChange} on each observer.
       *
       * @param selfChange True if this is a self-change notification.
       *
       * @deprecated Use {@link #dispatchChange} instead.
       */
      @Deprecated
      public void notifyChange(boolean selfChange) {
          synchronized(mObservers) {
              for (ContentObserver observer : mObservers) {
                  observer.onChange(selfChange, null);
              }
          }
      }
  }
  