org.apache.tiles.el.JspExpressionFactoryFactory Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.tiles.el;
import org.apache.tiles.request.ApplicationContext;
import org.apache.tiles.request.ApplicationContextAware;
import javax.el.ExpressionFactory;
import javax.servlet.ServletContext;
import javax.servlet.jsp.JspFactory;
/**
* Uses the JSP 2.1 {@link ExpressionFactory} to be used in Tiles.
*
* @since 2.2.1
*/
public class JspExpressionFactoryFactory implements ExpressionFactoryFactory, ApplicationContextAware {
/**
* The servlet context.
*
* @since 2.2.1
*/
protected ServletContext servletContext;
/**
* {@inheritDoc}
*/
public void setApplicationContext(ApplicationContext applicationContext) {
Object context = applicationContext.getContext();
if (context instanceof ServletContext) {
this.servletContext = (ServletContext) context;
} else {
throw new IllegalArgumentException(
"The application context does not hold an instance of "
+ "ServletContext, consider using JuelExpressionFactoryFactory");
}
}
/**
* {@inheritDoc}
*/
public ExpressionFactory getExpressionFactory() {
return JspFactory.getDefaultFactory().getJspApplicationContext(
servletContext).getExpressionFactory();
}
}