org.apache.commons.betwixt.expression
Interface Expression

All Known Implementing Classes:

EmptyExpression, IteratorExpression, StringExpression, VariableExpression, ConstantExpression, MethodExpression

public interface Expression

Expression represents an arbitrary expression on a bean.

Version:

$Revision: 1.2 $

Author:

James Strachan

Method Summary

java.lang.Object	evaluate(Context context) Evaluates the expression on the bean with the given context and returns the result
void	update(Context context, java.lang.String newValue) Updates the current bean context with a new String value.

Method Detail

evaluate

public java.lang.Object evaluate(Context context)

Evaluates the expression on the bean with the given context and returns the result

Parameters:

context - evaluate against this Context

Returns:

the value of the expression

update

public void update(Context context,
                   java.lang.String newValue)

Updates the current bean context with a new String value. This is typically used when parsing XML and updating a beans value from XML.

Parameters:

context - update this Context

newValue - the new value for this expression