org.apache.commons.betwixt.expression
Class IteratorExpression

java.lang.Object
  org.apache.commons.betwixt.expression.IteratorExpression

All Implemented Interfaces:

Expression

public class IteratorExpression
extends java.lang.Object
implements Expression

IteratorExpression returns an iterator over the current context.

Version:

$Revision: 438373 $

Author:

James Strachan

Constructor Summary

IteratorExpression(Expression expression)
Construct IteratorExpression using given expression for initial evaluation.

Method Summary

java.lang.Object	evaluate(Context context) Returns an interator over the current context
java.lang.String	toString() Returns something useful for logging
void	update(Context context, java.lang.String newValue) Do nothing

Methods inherited from class java.lang.Object

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

Constructor Detail

IteratorExpression

public IteratorExpression(Expression expression)

Construct IteratorExpression using given expression for initial evaluation.

Parameters:

expression - this expression will be evaluated and the result converted to an iterator.

Method Detail

evaluate

public java.lang.Object evaluate(Context context)

Returns an interator over the current context

Specified by:

evaluate in interface Expression

Parameters:

context - evaluate against this Context

Returns:

the value of the expression

See Also:

Expression

update

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

Do nothing

Specified by:

update in interface Expression

Parameters:

context - update this Context

newValue - the new value for this expression

See Also:

Expression

toString

public java.lang.String toString()

Returns something useful for logging

Overrides:

toString in class java.lang.Object

Returns:

string useful for logging