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 397092 2006-04-26 05:11:28Z dion $

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

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.