org.apache.commons.jexl
Interface Expression

All Known Implementing Classes:

ExpressionImpl

public interface Expression

Inferface for expression object.

Version:

$Id: Expression.java,v 1.3 2003/10/09 21:28:55 rdonkin Exp $

Author:

Geir Magnusson Jr.

Method Summary

void	addPostResolver(JexlExprResolver resolver) allows addition of a resolver to allow custom interdiction of expression evaluation
void	addPreResolver(JexlExprResolver resolver) allows addition of a resolver to allow custom interdiction of expression evaluation
java.lang.Object	evaluate(JexlContext context) Evaluates the expression, returning the return value;
java.lang.String	getExpression() returns the expression used

Method Detail

evaluate

public java.lang.Object evaluate(JexlContext context)
                          throws java.lang.Exception

Evaluates the expression, returning the return value;

Throws:

java.lang.Exception

getExpression

public java.lang.String getExpression()

returns the expression used

addPreResolver

public void addPreResolver(JexlExprResolver resolver)

allows addition of a resolver to allow custom interdiction of expression evaluation

Parameters:

resolver - resolver to be called before Jexl expression evaluated

addPostResolver

public void addPostResolver(JexlExprResolver resolver)

allows addition of a resolver to allow custom interdiction of expression evaluation

Parameters:

resolver - resolver to be called if Jexl expression evaluated to null