javax.servlet.jsp.el
Interface VariableResolver

public interface VariableResolver

This class is used to customize the way an ExpressionEvaluator resolves variable references at evaluation time. For example, instances of this class can implement their own variable lookup mechanisms, or introduce the notion of "implicit variables" which override any other variables. An instance of this class should be passed when evaluating an expression.

An instance of this class includes the context against which resolution will happen

Since:

2.0

Method Summary

java.lang.Object

resolveVariable(java.lang.String pName) Resolves the specified variable.

Method Detail

resolveVariable

public java.lang.Object resolveVariable(java.lang.String pName)
                                 throws ELException

Resolves the specified variable. Returns null if the variable is not found.

Parameters:

pName - the name of the variable to resolve

Returns:

the result of the variable resolution

Throws:

ELException - if a failure occurred while trying to resolve the given variable