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