48 lines
1.6 KiB
Java
48 lines
1.6 KiB
Java
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/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.database;
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/**
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* A specialization of Observable for DataSetObserver that provides methods for
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* invoking the various callback methods of DataSetObserver.
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*/
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public class DataSetObservable extends Observable<DataSetObserver> {
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/**
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* Invokes onChanged on each observer. Called when the data set being observed has
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* changed, and which when read contains the new state of the data.
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*/
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public void notifyChanged() {
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synchronized(mObservers) {
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for (DataSetObserver observer : mObservers) {
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observer.onChanged();
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}
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}
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}
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/**
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* Invokes onInvalidated on each observer. Called when the data set being monitored
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* has changed such that it is no longer valid.
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*/
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public void notifyInvalidated() {
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synchronized (mObservers) {
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for (DataSetObserver observer : mObservers) {
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observer.onInvalidated();
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}
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}
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}
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}
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