jakarta.faces.event.PostAddToViewEvent Maven / Gradle / Ivy
Show all versions of jakarta.faces Show documentation
/*
* 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;
/**
*
*
* 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 and
* that either that instance or an ancestor of that instance was just added to 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.
*
*
*
*
*
* The implementation must guarantee that {@link jakarta.faces.application.Application#publishEvent} is called,
* immediately after any UIComponent instance is added to the view hierarchy except in the
* case where {@link jakarta.faces.render.ResponseStateManager#isPostback} returns true at the same
* time as {@link jakarta.faces.context.FacesContext#getCurrentPhaseId} returns
* {@link jakarta.faces.event.PhaseId#RESTORE_VIEW}. When both of those conditions are met,
* {@link jakarta.faces.application.Application#publishEvent} must not be called.
*
*
*
*
*
*
*
* The implementation must guarantee that {@link jakarta.faces.application.Application#publishEvent} is called in the
* following cases.
*
*
*
*
* -
*
* Upon the initial construction of the view, when each instance is added to the view.
*
*
*
* -
*
* On a non-initial rendering of the view, if a component is added to the view by the View Declaration Language
* implementation as a result of changes in evaluation result of Jakarta Expression Language expressions referenced by
* VDL tags such as c:if, ui:include, and other tags that dynamically influence the assembly
* of the view.
*
*
*
* -
*
* If a component is programmatically added to the view using the Java API directly. For example, user code manually
* adds children using comp.getChildren().add(), where comp is a UIComponent.
*
*
*
*
*
*
*
*
* @since 2.0
*/
public class PostAddToViewEvent extends ComponentSystemEvent {
private static final long serialVersionUID = -1113592223476173895L;
// ------------------------------------------------------------ Constructors
/**
*
* Instantiate a new PostAddToViewEvent that indicates the argument component was just added
* to the view.
*
*
* @param component the UIComponent that has just been added to the view.
*
* @throws IllegalArgumentException if the argument is null.
*/
public PostAddToViewEvent(UIComponent component) {
super(component);
}
/**
*
* Instantiate a new PostAddToViewEvent that indicates the argument component was just added
* to the view.
*
*
* @param facesContext the Faces context.
* @param component the UIComponent that has just been added to the view.
* @throws IllegalArgumentException if the argument is null.
*/
public PostAddToViewEvent(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 it is an appropriate listener, false otherwise.
*/
@Override
public boolean isAppropriateListener(FacesListener listener) {
return listener instanceof SystemEventListener;
}
}