/*******************************************************************************
* Copyright (c) 2011, 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
*
******************************************************************************/
package org.eclipse.persistence.jpa.jpql.tools.model;
import org.eclipse.persistence.jpa.jpql.tools.model.query.StateObject;
/**
* This is used in conjunction with {@link IPropertyChangeListener}. It contains the information
* regarding the property change.
*
* @version 2.4
* @since 2.4
* @author Pascal Filion
*/
public interface IPropertyChangeEvent<T> {
/**
* Returns the new value of the property that changed.
*
* @return The property's new value
*/
T getNewValue();
/**
* Returns the old value of the property that changed.
*
* @return The property's old value
*/
T getOldValue();
/**
* Returns the name of the property that changed.
*
* @return A unique identifier of the property that changed
*/
String getPropertyName();
/**
* Returns the source where the modification occurred and that fired the event.
*
* @return The source of the event
*/
<S extends StateObject> S getSource();
}