/*
This file is part of RouteConverter.
RouteConverter 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.
RouteConverter 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 RouteConverter; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Copyright (C) 2007 Christian Pesch. All Rights Reserved.
*/
package slash.navigation.download;
import slash.common.type.CompactCalendar;
import java.util.Comparator;
/**
* Compares {@link DownloadExecutor}s by their last sync date.
*
* @author Christian Pesch
*/
class DownloadExecutorComparator implements Comparator<Runnable> {
public int compare(Runnable r1, Runnable r2) {
if (!(r1 instanceof DownloadExecutor))
return -1;
if (!(r2 instanceof DownloadExecutor))
return 1;
return (int) (getTimeInMillis((DownloadExecutor) r1) - getTimeInMillis((DownloadExecutor) r2));
}
private long getTimeInMillis(DownloadExecutor executor) {
Checksum checksum = executor.getDownload().getFile().getExpectedChecksum();
if (checksum != null) {
CompactCalendar lastModified = checksum.getLastModified();
if (lastModified != null)
return lastModified.getTimeInMillis();
}
return 0;
}
}