com.mchange.v2.collection.MapEntry Maven / Gradle / Ivy
/*
* Distributed as part of mchange-commons-java 0.2.11
*
* Copyright (C) 2015 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of EITHER:
*
* 1) The GNU Lesser General Public License (LGPL), version 2.1, as
* published by the Free Software Foundation
*
* OR
*
* 2) The Eclipse Public License (EPL), version 1.0
*
* You may choose which license to accept if you wish to redistribute
* or modify this work. You may offer derivatives of this work
* under the license you have chosen, or you may provide the same
* choice of license which you have been offered here.
*
* This software 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.
*
* You should have received copies of both LGPL v2.1 and EPL v1.0
* along with this software; see the files LICENSE-EPL and LICENSE-LGPL.
* If not, the text of these licenses are currently available at
*
* LGPL v2.1: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* EPL v1.0: http://www.eclipse.org/org/documents/epl-v10.php
*
*/
package com.mchange.v2.collection;
import java.util.*;
import com.mchange.v2.lang.ObjectUtils;
public class MapEntry implements Map.Entry
{
Object key;
Object value;
public MapEntry( Object key, Object value )
{
this.key = key;
this.value = value;
}
public Object getKey()
{ return key; }
public Object getValue()
{ return value; }
public Object setValue(Object o)
{ throw new UnsupportedOperationException(); }
public boolean equals(Object o)
{
if (o instanceof Map.Entry)
{
Map.Entry other = (Map.Entry) o;
return
ObjectUtils.eqOrBothNull( this.key , other.getKey() ) &&
ObjectUtils.eqOrBothNull( this.value , other.getValue() );
}
else
return false;
}
/*
* Conforms to required contract for Map.Entry hashCode()
*/
public int hashCode()
{
return
ObjectUtils.hashOrZero( this.key ) ^
ObjectUtils.hashOrZero( this.value );
}
}