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This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright (c) 1997-2013 Oracle and/or its affiliates. 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_1_1.html
 * or packager/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 packager/legal/LICENSE.txt.
 * 
 * GPL Classpath Exception:
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 * exception as provided by Oracle in the GPL Version 2 section of the License
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 * 
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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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 com.sun.faces.application.view;

import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.SystemEvent;
import javax.faces.event.ViewMapListener;

/**
 * The ViewScope event listener.
 *
 *  To make it so the UIViewRoot.getViewMap is as independent as possible
 * from implementation specific code we need to get notified when a view map is
 * created or destroyed. This ViewMapListener is registered so we get notified
 * of these events. 
 *
 *  See jsf-ri-config.xml for the actual registration of this listener. 
 */
public class ViewScopeEventListener implements ViewMapListener {

    /**
     * Handle the system event.
     *
     * @param se the system event.
     * @throws AbortProcessingException
     */
    @Override
    public void processEvent(SystemEvent se) throws AbortProcessingException {
        ViewScopeManager.getInstance(FacesContext.getCurrentInstance()).processEvent(se);
    }

    /**
     * Is listener for.
     *
     * @param source the source.
     * @return true if UIViewRoot, false otherwise.
     */
    @Override
    public boolean isListenerForSource(Object source) {
        return (source instanceof UIViewRoot);
    }
}