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/*
* Copyright (C) 2013 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.photos.data;
import android.content.AsyncTaskLoader;
import android.content.Context;
import com.android.gallery3d.data.ContentListener;
import com.android.gallery3d.data.DataManager;
import com.android.gallery3d.data.MediaSet;
import com.android.gallery3d.data.MediaSet.SyncListener;
import com.android.gallery3d.util.Future;
/**
* Proof of concept, don't use
*/
public class MediaSetLoader extends AsyncTaskLoader<MediaSet> {
private static final SyncListener sNullListener = new SyncListener() {
@Override
public void onSyncDone(MediaSet mediaSet, int resultCode) {
}
};
private MediaSet mMediaSet;
private Future<Integer> mSyncTask = null;
private ContentListener mObserver = new ContentListener() {
@Override
public void onContentDirty() {
onContentChanged();
}
};
public MediaSetLoader(Context context, String path) {
super(context);
mMediaSet = DataManager.from(getContext()).getMediaSet(path);
}
@Override
protected void onStartLoading() {
super.onStartLoading();
mMediaSet.addContentListener(mObserver);
mSyncTask = mMediaSet.requestSync(sNullListener);
forceLoad();
}
@Override
protected boolean onCancelLoad() {
if (mSyncTask != null) {
mSyncTask.cancel();
mSyncTask = null;
}
return super.onCancelLoad();
}
@Override
protected void onStopLoading() {
super.onStopLoading();
cancelLoad();
mMediaSet.removeContentListener(mObserver);
}
@Override
protected void onReset() {
super.onReset();
onStopLoading();
}
@Override
public MediaSet loadInBackground() {
mMediaSet.loadIfDirty();
return mMediaSet;
}
}
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