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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) 1997-2015 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.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
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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.facelets.tag.composite;

import com.sun.faces.facelets.util.ReflectionUtil;
import java.beans.IntrospectionException;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Method;
import javax.el.ELContext;
import javax.el.ValueExpression;
import javax.faces.FacesException;
import javax.faces.context.FacesContext;

/**
 * A property descriptor for a composite component attribute.
 */
public class CompositeAttributePropertyDescriptor extends PropertyDescriptor {

    public CompositeAttributePropertyDescriptor(String propertyName, Method readMethod, Method writeMethod) throws IntrospectionException {
        super(propertyName, readMethod, writeMethod);
    }

    @Override
    public Object getValue(String attributeName) {
        Object result = super.getValue(attributeName);
        if ("type".equals(attributeName)) {
            if ((null != result) && !(result instanceof Class)) {
                FacesContext context = FacesContext.getCurrentInstance();
                ELContext elContext = context.getELContext();
                String classStr = (String) ((ValueExpression) result).getValue(elContext);
                if (null != classStr) {
                    try {
                        result = ReflectionUtil.forName(classStr);

                        this.setValue(attributeName, result);
                    } catch (ClassNotFoundException ex) {
                        classStr = "java.lang." + classStr;
                        boolean throwException = false;
                        try {
                            result = ReflectionUtil.forName(classStr);

                            this.setValue(attributeName, result);
                        } catch (ClassNotFoundException ex2) {
                            throwException = true;
                        }
                        if (throwException) {
                            String message = "Unable to obtain class for " + classStr;
                            throw new FacesException(message, ex);
                        }
                    }
                }

            }
        }
        return result;
    }
}