/*
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.tour;
import java.util.Comparator;
import static slash.common.io.Transfer.parseInteger;
import static slash.navigation.tour.TourFormat.POSITION_IN_LIST;
/**
* Compares {@link TourPosition} by the PositionInList attribute.
*
* @author Christian Pesch
*/
class PositionInListComparator implements Comparator<TourPosition> {
private int extractPositionInList(TourPosition position) {
Integer integer = parseInteger(position.get(POSITION_IN_LIST));
return integer != null ? integer : position.hashCode();
}
public int compare(TourPosition p1, TourPosition p2) {
return extractPositionInList(p1) - extractPositionInList(p2);
}
}