/* ==========================================
* JGraphT : a free Java graph-theory library
* ==========================================
*
* Project Info: http://jgrapht.sourceforge.net/
* Project Creator: Barak Naveh (http://sourceforge.net/users/barak_naveh)
*
* (C) Copyright 2003-2008, by Barak Naveh and Contributors.
*
* This program and the accompanying materials are dual-licensed under
* either
*
* (a) the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation, or (at your option) any
* later version.
*
* or (per the licensee's choosing)
*
* (b) the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation.
*/
/* -----------------
* OddEvenGroupComparator.java
* -----------------
* (C) Copyright 2005-2008, by Barak Naveh and Contributors.
*
* Original Author: Assaf Lehr
* Contributor(s): -
*
* $Id$
*
* Changes
* -------
*/
package org.jgrapht.experimental.isomorphism.comparators;
import org.jgrapht.experimental.equivalence.*;
/**
* Comparator which defines two groups of integers. Odds (mod2=1) and
* Evens(mod2=0). Works only on Integers.
*
* @author Assaf
* @since Jul 22, 2005
*/
public class OddEvenGroupComparator
implements EquivalenceComparator<Integer, Object>
{
//~ Methods ----------------------------------------------------------------
public boolean equivalenceCompare(
Integer arg1,
Integer arg2,
Object context1,
Object context2)
{
int int1 = arg1.intValue();
int int2 = arg2.intValue();
boolean result = ((int1 % 2) == (int2 % 2));
return result;
}
/* Odd and even must have unique values.
* @see
*
*
*
*
*
* org.jgrapht.experimental.equivalence.EquivalenceComparator#equivalenceHashcode(java.lang.Object)
*/
public int equivalenceHashcode(Integer arg1, Object context)
{
int int1 = arg1.intValue();
return int1 % 2;
}
}
// End OddEvenGroupComparator.java