/* Pair.java * * Copyright (c) 2002, Tuomas J. Lukka * * This file is part of Gzz. * * Gzz 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 2 of the License, or * (at your option) any later version. * * Gzz 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 Gzz; if not, write to the Free * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * * */ /* * Written by Tuomas J. Lukka */ package org.fenfire.util; /** A Pair, useful as a hash key. */ public class Pair { public final Object first; public final Object second; public Pair(Object first, Object second) { this.first = first; this.second = second; } public int hashCode() { return (first == null ? 23472861 : first.hashCode()*317501) ^ (second == null ? 97124109 : second.hashCode()*1941); } public boolean equals(Object o) { if(!(o instanceof Pair)) return false; Pair p = (Pair)o; if(first == null || !first.equals(p.first) || second == null || !second.equals(p.second)) return false; return true; } }