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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) 1997-2010 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:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * 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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 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * 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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 * and therefore, elected the GPL Version 2 license, then the option applies
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 */

package com.sun.faces.scripting.groovy;

import java.io.IOException;
import java.util.List;
import java.util.Locale;
import java.util.Map;

import javax.faces.FacesException;
import javax.faces.view.ViewDeclarationLanguage;
import javax.faces.application.ViewHandler;
import javax.faces.component.UIViewRoot;
import javax.faces.context.FacesContext;

/**
 * Proxy instance for a groovy-based ViewHandler.  This allows the ViewHandler
 * to remain registered with the application chain while picking up changes at runtime
 * from the associated groovy script.
 */
public class ViewHandlerProxy extends ViewHandler {

    private String scriptName;
    private ViewHandler vhDelegate;


    // ------------------------------------------------------------ Constructors
    

    public ViewHandlerProxy(String scriptName, ViewHandler vhDelegate) {

        this.scriptName = scriptName;
        this.vhDelegate = vhDelegate;

    }


    // ------------------------------------------------ Methods from ViewHandler


    @Override
    public String calculateCharacterEncoding(FacesContext context) {
        return getGroovyDelegate().calculateCharacterEncoding(context);
    }

    @Override
    public void initView(FacesContext context) throws FacesException {
        getGroovyDelegate().initView(context);
    }


    public Locale calculateLocale(FacesContext context) {
        return getGroovyDelegate().calculateLocale(context);
    }

    public String calculateRenderKitId(FacesContext context) {
        return getGroovyDelegate().calculateRenderKitId(context);
    }

    public UIViewRoot createView(FacesContext context, String viewId) {
        return getGroovyDelegate().createView(context, viewId);
    }

    public String getActionURL(FacesContext context, String viewId) {
        return getGroovyDelegate().getActionURL(context, viewId);
    }

    public String getResourceURL(FacesContext context, String path) {
        return getGroovyDelegate().getResourceURL(context, path);
    }

    @Override
    public String deriveViewId(FacesContext context, String input) {
        return getGroovyDelegate().deriveViewId(context, input);
    }

    @Override
    public String deriveLogicalViewId(FacesContext context, String input) {
        return getGroovyDelegate().deriveLogicalViewId(context, input);
    }


    @Override
    public String getRedirectURL(FacesContext context,
                                 String viewId,
                                 Map> parameters,
                                 boolean includeViewParams) {
        return getGroovyDelegate().getRedirectURL(context,
                                                  viewId,
                                                  parameters,
                                                  includeViewParams);
    }

    @Override
    public String getBookmarkableURL(FacesContext context,
                                     String viewId,
                                     Map> parameters,
                                     boolean includeViewParams) {
        return getGroovyDelegate().getBookmarkableURL(context,
                                                      viewId,
                                                      parameters,
                                                      includeViewParams);
    }

    @Override
    public ViewDeclarationLanguage getViewDeclarationLanguage(FacesContext context, String viewId) {
        return getGroovyDelegate().getViewDeclarationLanguage(context, viewId);
    }

    public void renderView(FacesContext context, UIViewRoot viewToRender)
    throws IOException, FacesException {
        getGroovyDelegate().renderView(context, viewToRender);
    }

    public UIViewRoot restoreView(FacesContext context, String viewId) {
        return getGroovyDelegate().restoreView(context, viewId);
    }

    public void writeState(FacesContext context) throws IOException {
        getGroovyDelegate().writeState(context);
    }


    // --------------------------------------------------------- Private Methods


    private ViewHandler getGroovyDelegate() {

        try {
            return ((ViewHandler) GroovyHelper.newInstance(scriptName,
                                                           ViewHandler.class,
                                                           vhDelegate));
        } catch (Exception e) {
            throw new FacesException(e);
        }

    }
    
}