/* XXL: The eXtensible and fleXible Library for data processing
Copyright (C) 2000-2011 Prof. Dr. Bernhard Seeger
Head of the Database Research Group
Department of Mathematics and Computer Science
University of Marburg
Germany
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; If not, see <http://www.gnu.org/licenses/>.
http://code.google.com/p/xxl/
*/
package xxl.core.comparators;
import java.io.Serializable;
import java.util.Comparator;
/**
* The InverseComparator inverts the ordering of a given Comparator.
*
* @param <T> the type of the objects to be compared.
* @see java.util.Comparator
*/
public class InverseComparator<T> implements Comparator<T>, Serializable {
/**
* The Comparator to be inverted.
*/
protected Comparator<? super T> comparator;
/** Creates a new InverseComparator.
@param comparator the Comparator to be inverted
*/
public InverseComparator(Comparator<? super T> comparator) {
this.comparator = comparator;
}
/**
* Compares its two arguments for order.
* @param object1 the first object to be compared
* @param object2 the second object to be compared
* @return the comparison result
*/
public int compare(T object1, T object2) {
return comparator.compare(object2, object1);
}
}