/*******************************************************************************
* 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.mappingsmodel.query.relational;
/**
* This interface is currently used to undo changes made to an expression
* in the ExpressionBuilderDialog. Each expression object implements Undoable.
* When a class fires a property change event it also informs the root expression
* of what changed(propertyName, oldValue, and newValue)
* This information is stored until the expression builder dialog is canceled.
* All of the saved 'changes' are then iterated through and the undoChange method is called.
*/
interface Undoable
{
public void undoChange(String propertyName, Object oldValue, Object newValue);
}