org.tinygroup.jspengine.runtime.VariableResolverImpl Maven / Gradle / Ivy
/**
* Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
*
* Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
*
* 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.tinygroup.jspengine.runtime;
import javax.el.ELContext;
import javax.el.ELResolver;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.el.VariableResolver;
/**
* This is the implementation of VariableResolver in JSP 2.0,
* using ELResolver in JSP2.1.
* It looks up variable references in the PageContext, and also
* recognizes references to implicit objects.
*
* @author Kin-man Chung
* @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: jluehe $
**/
public class VariableResolverImpl
implements VariableResolver
{
private PageContext pageContext;
//-------------------------------------
/**
* Constructor
**/
public VariableResolverImpl (PageContext pageContext) {
this.pageContext = pageContext;
}
//-------------------------------------
/**
* Resolves the specified variable within the given context.
* Returns null if the variable is not found.
**/
public Object resolveVariable (String pName)
throws javax.servlet.jsp.el.ELException {
ELContext elContext = pageContext.getELContext();
ELResolver elResolver = elContext.getELResolver();
try {
return elResolver.getValue(elContext, null, pName);
} catch (javax.el.ELException ex) {
throw new javax.servlet.jsp.el.ELException();
}
}
}