1 /* 2 * $Id: JspExpressionFactoryFactory.java 1229087 2012-01-09 10:35:14Z mck $ 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 package org.apache.tiles.el; 23 24 import javax.el.ExpressionFactory; 25 import javax.servlet.ServletContext; 26 import javax.servlet.jsp.JspFactory; 27 28 import org.apache.tiles.request.ApplicationContext; 29 import org.apache.tiles.request.ApplicationContextAware; 30 31 /** 32 * Uses the JSP 2.1 {@link ExpressionFactory} to be used in Tiles. 33 * 34 * @version $Rev: 1229087 $ $Date: 2012-01-09 21:35:14 +1100 (Mon, 09 Jan 2012) $ 35 * @since 2.2.1 36 */ 37 public class JspExpressionFactoryFactory implements ExpressionFactoryFactory, 38 ApplicationContextAware { 39 40 /** 41 * The servlet context. 42 * 43 * @since 2.2.1 44 */ 45 protected ServletContext servletContext; 46 47 /** {@inheritDoc} */ 48 public void setApplicationContext(ApplicationContext applicationContext) { 49 Object context = applicationContext.getContext(); 50 if (context instanceof ServletContext) { 51 this.servletContext = (ServletContext) context; 52 } else { 53 throw new IllegalArgumentException( 54 "The application context does not hold an instance of " 55 + "ServletContext, consider using JuelExpressionFactoryFactory"); 56 } 57 } 58 59 /** {@inheritDoc} */ 60 public ExpressionFactory getExpressionFactory() { 61 return JspFactory.getDefaultFactory().getJspApplicationContext( 62 servletContext).getExpressionFactory(); 63 } 64 }