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FolderDetailLoader.java
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/
FolderDetailLoader.java
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/*
* Copyright (C) 2009 Roman Masek
*
* This file is part of OpenSudoku.
*
* OpenSudoku is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OpenSudoku is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenSudoku. If not, see <http://www.gnu.org/licenses/>.
*
*/
package org.moire.opensudoku.gui;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import android.content.Context;
import android.os.Handler;
import android.util.Log;
import org.moire.opensudoku.db.SudokuDatabase;
import org.moire.opensudoku.game.FolderInfo;
/**
* Loads details of given folders on one single background thread.
* Results are published on GUI thread via {@link FolderDetailCallback} interface.
* <p/>
* Please note that instance of this class has to be created on GUI thread!
* <p/>
* You should explicitly call {@link #destroy()} when this object is no longer needed.
*
* @author romario
*/
public class FolderDetailLoader {
private static final String TAG = "FolderDetailLoader";
private Context mContext;
private SudokuDatabase mDatabase;
private Handler mGuiHandler;
private ExecutorService mLoaderService = Executors.newSingleThreadExecutor();
public FolderDetailLoader(Context context) {
mContext = context;
mDatabase = new SudokuDatabase(mContext);
mGuiHandler = new Handler();
}
public void loadDetailAsync(long folderID, FolderDetailCallback loadedCallback) {
final long folderIDFinal = folderID;
final FolderDetailCallback loadedCallbackFinal = loadedCallback;
mLoaderService.execute(new Runnable() {
@Override
public void run() {
try {
final FolderInfo folderInfo = mDatabase.getFolderInfoFull(folderIDFinal);
mGuiHandler.post(new Runnable() {
@Override
public void run() {
loadedCallbackFinal.onLoaded(folderInfo);
}
});
} catch (Exception e) {
// this is some unimportant background stuff, do not fail
Log.e(TAG, "Error occured while loading full folder info.", e);
}
}
});
}
public void destroy() {
mLoaderService.shutdownNow();
mDatabase.close();
}
public interface FolderDetailCallback {
void onLoaded(FolderInfo folderInfo);
}
}