jakarta.faces.event.ValueChangeEvent Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2020 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 v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package jakarta.faces.event;
import jakarta.faces.component.UIComponent;
import jakarta.faces.context.FacesContext;
/**
*
* 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 {
private static final long serialVersionUID = 2455861757565618446L;
/**
*
* 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;
}
/**
*
* Construct a new event object from the Faces context, specified source component, old value and new value.
*
*
*
* The default {@link PhaseId} for this event is {@link PhaseId#ANY_PHASE}.
*
*
* @param facesContext the Faces context.
* @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(FacesContext facesContext, UIComponent component, Object oldValue, Object newValue) {
super(facesContext, 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}.
*
*
* @return the previous local value
*/
public Object getOldValue() {
return oldValue;
}
/**
*
* The current local value of the source {@link UIComponent}.
*
*/
private Object newValue = null;
/**
*
* Return the current local value of the source {@link UIComponent}.
*
*
* @return the current local value
*/
public Object getNewValue() {
return newValue;
}
// ------------------------------------------------- Event Broadcast Methods
@Override
public boolean isAppropriateListener(FacesListener listener) {
return listener instanceof ValueChangeListener;
}
/**
* @throws AbortProcessingException {@inheritDoc}
*/
@Override
public void processListener(FacesListener listener) {
((ValueChangeListener) listener).processValueChange(this);
}
}