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This is the master POM file for Oracle's Implementation of the JSF 2.1 Specification.
There is a newer version: 2.1
/*
 * $Id: ValueChangeEvent.java,v 1.9 2007/04/27 22:00:09 ofung Exp $
 */

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
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 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
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 */

package javax.faces.event;


import javax.faces.component.UIComponent;


/**
 * A {@link ValueChangeEvent} is a notification that the local value of
 * the source component has been change as a result of user interface
 * activity.  It is not fired unless validation of the new value was
 * completed successfully.
 */

public class ValueChangeEvent extends FacesEvent {


    // ------------------------------------------------------------ Constructors


    /**
     * Construct a new event object from the specified source component,
     * old value, and new value.
     *
     * The default {@link PhaseId} for this event is {@link
     * PhaseId#ANY_PHASE}.
     *
     * @param component Source {@link UIComponent} for this event
     * @param oldValue The previous local value of this {@link UIComponent}
     * @param newValue The new local value of thie {@link UIComponent}
     *
     * @throws IllegalArgumentException if component is
     *  null
     */
    public ValueChangeEvent(UIComponent component,
                             Object oldValue, Object newValue) {

        super(component);
        this.oldValue = oldValue;
        this.newValue = newValue;
    }


    // -------------------------------------------------------------- Properties


    /**
     * The previous local value of the source {@link UIComponent}.
     */
    private Object oldValue = null;


    /**
     * Return the previous local value of the source {@link UIComponent}.
     * 
     */
    public Object getOldValue() {

        return (this.oldValue);

    }


    /**
     * The current local value of the source {@link UIComponent}.
     */
    private Object newValue = null;


    /**
     * Return the current local value of the source {@link UIComponent}.
     * 
     */
    public Object getNewValue() {

        return (this.newValue);

    }


    // ------------------------------------------------- Event Broadcast Methods


    public boolean isAppropriateListener(FacesListener listener) {

        return (listener instanceof ValueChangeListener);

    }

    /**
     * @throws AbortProcessingException {@inheritDoc}
     */ 
    public void processListener(FacesListener listener) {

        ((ValueChangeListener) listener).processValueChange(this);

    }


}