com.sun.faces.facelets.compiler.NamespaceHandler Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of javax.faces Show documentation
This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
There is a newer version: 2.4.0
/*
 * 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:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * 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
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 *
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 * Copyright 2005-2007 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.sun.faces.facelets.compiler;

import com.sun.faces.facelets.el.CompositeFunctionMapper;
import com.sun.faces.facelets.tag.TagLibrary;
import com.sun.faces.el.ELContextImpl;

import javax.el.FunctionMapper;
import javax.el.ELContext;
import javax.faces.component.UIComponent;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.FaceletHandler;
import javax.faces.context.FacesContext;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.Map;

final class NamespaceHandler extends FunctionMapper implements FaceletHandler {

    private final TagLibrary library;
    private final Map ns;
    private FaceletHandler next;
    
    public NamespaceHandler(FaceletHandler next, TagLibrary library, Map ns) {
        this.library = library;
        this.ns = ns;
        this.next = next;
    }

    public void apply(FaceletContext ctx, UIComponent parent)
            throws IOException {
        FunctionMapper orig = ctx.getFunctionMapper();
        pushMapper(ctx.getFacesContext(), this);
        ctx.setFunctionMapper(new CompositeFunctionMapper(this, orig));
        try {
            next.apply(ctx, parent);
        } finally {
            ctx.setFunctionMapper(orig);
        }
    }

    public Method resolveFunction(String prefix, String localName) {
        String uri = (String) this.ns.get(prefix);
        if (uri != null) {
            return this.library.createFunction(uri, localName);
        }
        return null;
    }


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


    private void pushMapper(FacesContext ctx, FunctionMapper mapper) {

        ELContext elContext = ctx.getELContext();
        if (elContext instanceof ELContextImpl) {
            ((ELContextImpl) elContext).setFunctionMapper(mapper);
        }

    }

}