2 * Copyright (C) 2007 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 package android.database;
20 * A specialization of Observable for DataSetObserver that provides methods for
21 * invoking the various callback methods of DataSetObserver.
23 public class DataSetObservable extends Observable<DataSetObserver> {
25 * Invokes onChanged on each observer. Called when the data set being observed has
26 * changed, and which when read contains the new state of the data.
28 public void notifyChanged() {
29 synchronized(mObservers) {
30 for (DataSetObserver observer : mObservers) {
37 * Invokes onInvalidated on each observer. Called when the data set being monitored
38 * has changed such that it is no longer valid.
40 public void notifyInvalidated() {
41 synchronized (mObservers) {
42 for (DataSetObserver observer : mObservers) {
43 observer.onInvalidated();