javax.faces.event.PreRemoveFromViewEvent Maven / Gradle / Ivy
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/*
* Copyright (c) 1997, 2018 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 javax.faces.event;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
/**
*
* When an instance of this event is passed
* to {@link SystemEventListener#processEvent} or {@link
* ComponentSystemEventListener#processEvent}, the listener
* implementation may assume that the source of this event
* instance is a {@link UIComponent} instance that is about to be
* removed from the view. Therefore, the implementation may assume it
* is safe to call {@link UIComponent#getParent}, {@link
* UIComponent#getClientId}, and other methods that depend upon the
* component instance being added into the view.
* @since 2.0
*/
public class PreRemoveFromViewEvent extends ComponentSystemEvent {
// ------------------------------------------------------------ Constructors
private static final long serialVersionUID = 1715650557625760365L;
/**
* Instantiate a new
* BeforeRemoveFromView that indicates the argument
* component is about to be removed from the view.
* @param component the UIComponent that is about to be
* removed from the view.
*
* @throws IllegalArgumentException if component is
* null
*/
public PreRemoveFromViewEvent(UIComponent component) {
super(component);
}
/**
* Instantiate a new
* BeforeRemoveFromView that indicates the argument
* component is about to be removed from the view.
*
* @param facesContext the Faces context.
* @param component the UIComponent that is about to be
* removed from the view.
* @throws IllegalArgumentException if component is
* null
*/
public PreRemoveFromViewEvent(FacesContext facesContext, UIComponent component) {
super(facesContext, component);
}
// --------------------------------------- Methods from ComponentSystemEvent
/**
* Returns true if and
* only if the argument listener is an instance of
* {@link SystemEventListener}.
*
* @param listener the faces listener.
* @return true if the listener is an appropriate one, false otherwise.
*/
@Override
public boolean isAppropriateListener(FacesListener listener) {
return (listener instanceof SystemEventListener);
}
}