/*
* $Id: VelocityStrutsUtil.java 651946 2008-04-27 13:41:38Z apetrelli $
*
* 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.struts2.util;
import java.io.CharArrayWriter;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.context.Context;
import org.apache.velocity.exception.MethodInvocationException;
import org.apache.velocity.exception.ParseErrorException;
import org.apache.velocity.exception.ResourceNotFoundException;
import com.opensymphony.xwork2.util.ValueStack;
/**
* Struts velocity related util.
*
*/
public class VelocityStrutsUtil extends StrutsUtil {
private Context ctx;
private VelocityEngine velocityEngine;
public VelocityStrutsUtil(VelocityEngine engine, Context ctx, ValueStack stack, HttpServletRequest request, HttpServletResponse response) {
super(stack, request, response);
this.ctx = ctx;
this.velocityEngine = engine;
}
public String evaluate(String expression) throws IOException, ResourceNotFoundException, MethodInvocationException, ParseErrorException {
CharArrayWriter writer = new CharArrayWriter();
velocityEngine.evaluate(ctx, writer, "Error parsing " + expression, expression);
return writer.toString();
}
}
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