/*
* JBoss, Home of Professional Open Source
* Copyright 2009 Red Hat Inc. and/or its affiliates and other
* contributors as indicated by the @author tags. All rights reserved.
* See the copyright.txt in the distribution for a full listing of
* individual contributors.
*
* This 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 2.1 of
* the License, or (at your option) any later version.
*
* 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. 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.infinispan.util;
import java.io.Serializable;
import java.util.Map;
import java.util.Map.Entry;
/**
* Where is Java 1.6?
*
* @author (various)
* @since 4.0
*/
public class SimpleImmutableEntry<K, V> implements Map.Entry<K, V>, Serializable {
private static final long serialVersionUID = -6092752114794052323L;
private final K key;
private final V value;
public SimpleImmutableEntry(Entry<K, V> me) {
key = me.getKey();
value = me.getValue();
}
public SimpleImmutableEntry(K key, V value) {
this.key = key;
this.value = value;
}
@Override
public K getKey() {
return key;
}
@Override
public V getValue() {
return value;
}
@Override
public V setValue(V arg0) {
throw new UnsupportedOperationException();
}
@Override
public boolean equals(Object o) {
if (!(o instanceof Map.Entry))
return false;
Map.Entry<?, ?> e2 = (Map.Entry<?, ?>) o;
return (getKey() == null ? e2.getKey() == null : getKey().equals(e2.getKey()))
&& (getValue() == null ? e2.getValue() == null : getValue().equals(e2.getValue()));
}
@Override
public int hashCode() {
return (getKey() == null ? 0 : getKey().hashCode()) ^
(getValue() == null ? 0 : getValue().hashCode());
}
@Override
public String toString() {
return key + "=" + value;
}
}