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  * JBoss, Home of Professional Open Source
  * Copyright ${year}, Red Hat, Inc. and individual contributors
  * by the @authors tag. See the copyright.txt in the distribution for a
  * full listing of individual contributors.
  * This is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
  * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * Lesser General Public License for more details.
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site:
package org.richfaces.component.event;
import  javax.faces.component.UIComponent;
import  javax.faces.context.FacesContext;
import  javax.faces.event.AbortProcessingException;
import  javax.faces.event.ComponentSystemEvent;
import  javax.faces.event.ComponentSystemEventListener;
import  javax.faces.event.PreRenderComponentEvent;

Listener takes component to be processed before parent component is rendered.

The parent does not need to be parent component, but given component will be searched for in context of parent component by its id using UIComponent.findComponent(String).

The listener for PreRenderComponentEvent will be automatically bound to parent component.

public abstract class PreRenderParentListener implements ComponentSystemEventListener, Serializable {
    private static final long serialVersionUID = 2106663563922715641L;
    private String componentId;
    public PreRenderParentListener(UIComponent parent, UIComponent component) {
        this. = component.getId();

Will be processed before the component which this event is registered to is rendered
    protected abstract void preRenderParent(FacesContext facesContext, UIComponent component);
    public void processEvent(ComponentSystemEvent eventthrows AbortProcessingException {
        if (event instanceof PreRenderComponentEvent) {
            final FacesContext facesContext = FacesContext.getCurrentInstance();
            final UIComponent parent = event.getComponent();
            final UIComponent component = parent.findComponent();
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