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Jena is a Java framework for building Semantic Web applications. It provides a programmatic environment for RDF, RDFS and OWL, SPARQL and includes a rule-based inference engine.

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/*
 *  (c) Copyright 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 Hewlett-Packard Development Company, LP
 *  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: PairEntry.java,v 1.2 2009/08/08 11:25:32 andy_seaborne Exp $
 *
 */

package com.hp.hpl.jena.xmloutput.impl;

/*
 * @author jjc
 * @version  Release='$Name:  $' Revision='$Revision: 1.2 $' Date='$Date: 2009/08/08 11:25:32 $'
 */
class PairEntry  implements java.util.Map.Entry  {
    K a;
    V b;
    @Override
    public boolean equals(Object o) {
        if (o != null && (o instanceof PairEntry)) {
            PairEntry e = (PairEntry) o;
            return e.a.equals(a) && e.b.equals(b);
        } 
        return false;
        
    }
    public K getKey() {
        return a;
    }
    public V getValue() {
        return b;
    }
    @Override
    public int hashCode() {
        return a.hashCode() ^ b.hashCode();
    }
    public V setValue(Object value) {
        throw new UnsupportedOperationException();
    }
    PairEntry(K a, V b) {
        this.a = a;
        this.b = b;
    }
}