/*
 * 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 Observable for ContentObserver that provides methods for sending notifications to a list of ContentObserver objects. /**
 * 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 ContentObserver.dispatchChange(boolean) on each observer. 

If selfChange is true, only delivers the notification to the observer if it has indicated that it wants to receive self-change notifications by implementing ContentObserver.deliverSelfNotifications to return true. 
Params:
selfChange – True if this is a self-change notification.
Deprecated:
Use dispatchChange(boolean, Uri) instead./**
     * 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 ContentObserver.dispatchChange(boolean, Uri) on each observer. Includes the changed content Uri when available. 

If selfChange is true, only delivers the notification to the observer if it has indicated that it wants to receive self-change notifications by implementing ContentObserver.deliverSelfNotifications to return true. 
Params:
selfChange – True if this is a self-change notification.
uri – The Uri of the changed content, or null if unknown./**
     * 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 ContentObserver.onChange on each observer. 
Params:
selfChange – True if this is a self-change notification.
Deprecated:
Use dispatchChange instead./**
     * 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);
            }
        }
    }
}