org.apache.commons.jexl.resolver

Class FlatResolver

java.lang.Object

org.apache.commons.jexl.resolver.FlatResolver

All Implemented Interfaces:

JexlExprResolver

public class FlatResolver
extends Object
implements JexlExprResolver

Simple resolver to try the expression as-is from the context. For example, you could resolve ant-ish properties (foo.bar.woogie) using this... hint, hint...

Since:

1.0

Version:

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

Author:

Geir Magnusson Jr.

Field Summary

Fields

Modifier and Type	Field and Description
protected boolean	noValOnNull Flag to return NO_VALUE on null from context.

Fields inherited from interface org.apache.commons.jexl.JexlExprResolver

NO_VALUE

Constructor Summary

Constructors

Constructor and Description
FlatResolver() Default CTOR.
FlatResolver(boolean valOnNull) CTOR that lets you override the default behavior of noValOnNull, which is true.

Method Summary

Modifier and Type	Method and Description
Object	evaluate(JexlContext context, String expression) Try to resolve expression as-is.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

noValOnNull

protected boolean noValOnNull

Flag to return NO_VALUE on null from context. this allows jexl to try to evaluate

Constructor Detail

FlatResolver

public FlatResolver()

Default CTOR.

FlatResolver

public FlatResolver(boolean valOnNull)

CTOR that lets you override the default behavior of noValOnNull, which is true. (jexl gets a shot after if null)

Parameters:

valOnNull - Whether NO_VALUE will be returned instead of null.

Method Detail

evaluate

public Object evaluate(JexlContext context,
                       String expression)

Try to resolve expression as-is.

Specified by:

evaluate in interface JexlExprResolver

Parameters:

context - The context for resolution.

expression - The flat expression.

Returns:

The resolved value.