blob: 558a8648e445b2d530860c6a8a645f9d904fbb33 [file] [log] [blame]
/*
* Copyright (C) 2010 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 com.android.gallery3d.data;
import android.net.Uri;
import com.android.gallery3d.app.GalleryApp;
import java.util.concurrent.atomic.AtomicBoolean;
// This handles change notification for media sets.
public class ChangeNotifier {
private MediaSet mMediaSet;
private AtomicBoolean mContentDirty = new AtomicBoolean(true);
public ChangeNotifier(MediaSet set, Uri uri, GalleryApp application) {
mMediaSet = set;
application.getDataManager().registerChangeNotifier(uri, this);
}
public ChangeNotifier(MediaSet set, Uri[] uris, GalleryApp application) {
mMediaSet = set;
for (int i = 0; i < uris.length; i++) {
application.getDataManager().registerChangeNotifier(uris[i], this);
}
}
// Returns the dirty flag and clear it.
public boolean isDirty() {
return mContentDirty.compareAndSet(true, false);
}
public void fakeChange() {
onChange(false);
}
protected void onChange(boolean selfChange) {
if (mContentDirty.compareAndSet(false, true)) {
mMediaSet.notifyContentChanged();
}
}
}