/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *   http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 package javax.faces.event;

 import javax.faces.component.UIComponent;

 /**

  * see Javadoc of <a href="http://java.sun.com/javaee/javaserverfaces/1.2/docs/api/index.html">JSF Specification</a>

  */

 public class ValueChangeEvent extends FacesEvent

 {

     private static final long serialVersionUID = -2490528664421353795L;

     // FIELDS

     private Object _oldValue;

     private Object _newValue;

     // CONSTRUCTORS

     public ValueChangeEvent(UIComponent uiComponent, Object oldValue, Object newValue)

     {

         super(uiComponent);

         if (uiComponent == null)

         {

             throw new IllegalArgumentException("uiComponent");

         }

         _oldValue = oldValue;

         _newValue = newValue;

     }

     // METHODS

     public Object getNewValue()

     {

         return _newValue;

     }

     public Object getOldValue()

     {

         return _oldValue;

     }

     @Override

     public boolean isAppropriateListener(FacesListener facesListeners)

     {

         return facesListeners instanceof ValueChangeListener;

     }

     @Override

     public void processListener(FacesListener facesListeners)

     {

         ((ValueChangeListener)facesListeners).processValueChange(this);

     }

 }