org.apache.jasper.runtime.VariableResolverImpl Maven / Gradle / Ivy
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package org.apache.jasper.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: kchung $
**/
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();
}
}
}