/*
* Copyright (c) 2005-2016 Vincent Vandenschrick. All rights reserved.
*
* This file is part of the Jspresso framework.
*
* Jspresso 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 3 of the License, or
* (at your option) any later version.
*
* Jspresso 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 Jspresso. If not, see <http://www.gnu.org/licenses/>.
*/
package org.jspresso.framework.model;
/**
* This public interface must be implemented by classes willing to keep track of
* {@code IModelProvider} model changes.
*
* @author Vincent Vandenschrick
*/
public interface IModelChangeListener {
/**
* This method is triggered when the listener detects that a
* {@code IModelProvider} model changed. Ideally this method will only
* fire when {@code oldValue} differs from {@code newValue}.
*
* @param evt
* The event representing the change. This event will have : <li>
* {@code source} set to the bean provider which first initiated
* the event. <li>{@code oldValue} set to the new source's
* model. <li>{@code newValue} set to the old source's model.
*/
void modelChange(ModelChangeEvent evt);
}