/*******************************************************************************
* Copyright (c) 1998, 2015 Oracle and/or its affiliates. All rights reserved.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
* which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Oracle - initial API and implementation from Oracle TopLink
******************************************************************************/
package org.eclipse.persistence.tools.workbench.utility;
import java.io.Serializable;
/**
* Straightforward implementation of Association.
*/
public class SimpleAssociation
extends AbstractAssociation
implements Cloneable, Serializable
{
private final Object key;
private Object value;
private static final long serialVersionUID = 1L;
/**
* Construct an association with the specified key
* and a null value.
*/
public SimpleAssociation(Object key) {
super();
this.key = key;
}
/**
* Construct an association with the specified key and value.
*/
public SimpleAssociation(Object key, Object value) {
this(key);
this.value = value;
}
/**
* @see Association#getKey()
*/
public Object getKey() {
return this.key;
}
/**
* @see Association#getValue()
*/
public synchronized Object getValue() {
return this.value;
}
/**
* @see Association#setValue(Object)
*/
public synchronized Object setValue(Object value) {
Object old = this.value;
this.value = value;
return old;
}
/**
* @see Object#clone()
*/
public synchronized Object clone() {
try {
return super.clone();
} catch (CloneNotSupportedException ex) {
throw new InternalError();
}
}
}