/*
* TV-Browser
* Copyright (C) 04-2003 Martin Oberhauser (darras@users.sourceforge.net)
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* CVS information:
* $Date: 2008-08-21 08:24:11 +0200 (Do, 21 Aug 2008) $
* $Author: Bananeweizen $
* $Revision: 4913 $
*/
package util.misc;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Properties;
import util.io.stream.OutputStreamProcessor;
import util.io.stream.StreamUtilities;
/**
* properties implementation which tracks changes and only stores itself to disk
* if there were changes in the properties collection
*
* @author Bananeweizen
*
*/
public class ChangeTrackingProperties extends Properties {
private boolean mChanged = false;
@Override
public synchronized Object setProperty(String key, String value) {
mChanged = true;
return super.setProperty(key, value);
}
/**
* whether or not the properties stored in this object have changed since
* object creation
*
* @return changed
*/
synchronized public boolean changed() {
return mChanged;
}
public void store(File file) throws IOException {
if (changed()) {
StreamUtilities.outputStream(file, new OutputStreamProcessor() {
@Override
public void process(OutputStream outputStream) throws IOException {
store(outputStream, null);
}
});
}
}
}