org.apache.commons.jexl

Interface JexlExprResolver

All Known Implementing Classes:

FlatResolver

public interface JexlExprResolver

A Resolver allows custom resolution of the expression, and can be added in front of the jexl engine, or after in the evaluation.

Since:

1.0

Version:

$Id: JexlExprResolver.java 480412 2006-11-29 05:11:23Z bayard $

Author:

Geir Magnusson Jr.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.Object	NO_VALUE represents an expression result of no value.

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	evaluate(JexlContext context, java.lang.String expression) Evaluates an expression against the context.

Field Detail

NO_VALUE

static final java.lang.Object NO_VALUE

represents an expression result of no value.

Method Detail

evaluate

java.lang.Object evaluate(JexlContext context,
                        java.lang.String expression)

Evaluates an expression against the context.

Parameters:

context - current data context

expression - expression to evauluate

Returns:

value (may be null) or the NO_VALUE object to indicate no resolution.