/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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 org.seasar.teeda.core.el.impl.commons;

 import java.io.StringReader;

 import javax.faces.el.ReferenceSyntaxException;

 import org.apache.commons.el.parser.ELParser;

 import org.apache.commons.el.parser.ParseException;

 import org.seasar.teeda.core.el.ExpressionProcessor;

 import org.seasar.teeda.core.el.impl.JspELParserUtil;

 /**

  * @author shot

  */

 public class CommonsELParser implements org.seasar.teeda.core.el.ELParser {

     private static final long serialVersionUID = 1L;

     private ExpressionProcessor processor;

     public CommonsELParser() {

     }

     public Object parse(final String expression) {

         String jspExpression = JspELParserUtil

                 .convertToJspExpression(expression);

         ELParser parser = new ELParser(new StringReader(jspExpression));

         try {

             Object obj = parser.ExpressionString();

             getExpressionProcessor().processExpression(obj, Object.class);

             return obj;

         } catch (ParseException e) {

             throw new ReferenceSyntaxException();

         }

     }

     public ExpressionProcessor getExpressionProcessor() {

         return processor;

     }

     public void setExpressionProcessor(ExpressionProcessor processor) {

         this.processor = processor;

     }

 }