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| author | The Android Open Source Project <initial-contribution@android.com> | 2008-10-21 07:00:00 -0700 |
|---|---|---|
| committer | The Android Open Source Project <initial-contribution@android.com> | 2008-10-21 07:00:00 -0700 |
| commit | 54b6cfa9a9e5b861a9930af873580d6dc20f773c (patch) | |
| tree | 35051494d2af230dce54d6b31c6af8fc24091316 /core/java/android/database/ContentObservable.java | |
| download | frameworks_base-54b6cfa9a9e5b861a9930af873580d6dc20f773c.zip frameworks_base-54b6cfa9a9e5b861a9930af873580d6dc20f773c.tar.gz frameworks_base-54b6cfa9a9e5b861a9930af873580d6dc20f773c.tar.bz2 | |
Initial Contribution
Diffstat (limited to 'core/java/android/database/ContentObservable.java')
| -rw-r--r-- | core/java/android/database/ContentObservable.java | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/core/java/android/database/ContentObservable.java b/core/java/android/database/ContentObservable.java new file mode 100644 index 0000000..8d7b7c5 --- /dev/null +++ b/core/java/android/database/ContentObservable.java @@ -0,0 +1,56 @@ +/* + * 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; + +/** + * A specialization of Observable for ContentObserver that provides methods for + * invoking the various callback methods of ContentObserver. + */ +public class ContentObservable extends Observable<ContentObserver> { + + @Override + public void registerObserver(ContentObserver observer) { + super.registerObserver(observer); + } + + /** + * invokes dispatchUpdate on each observer, unless the observer doesn't want + * self-notifications and the update is from a self-notification + * @param selfChange + */ + public void dispatchChange(boolean selfChange) { + synchronized(mObservers) { + for (ContentObserver observer : mObservers) { + if (!selfChange || observer.deliverSelfNotifications()) { + observer.dispatchChange(selfChange); + } + } + } + } + + /** + * invokes onChange on each observer + * @param selfChange + */ + public void notifyChange(boolean selfChange) { + synchronized(mObservers) { + for (ContentObserver observer : mObservers) { + observer.onChange(selfChange); + } + } + } +} |