org.apache.commons.betwixt.expression

Class IteratorExpression

java.lang.Object

org.apache.commons.betwixt.expression.IteratorExpression

All Implemented Interfaces:

Expression

public class IteratorExpression
extends Object
implements Expression

IteratorExpression returns an iterator over the current context.

Version:

$Revision: 1.5 $

Author:

James Strachan

Field Summary

Fields

Modifier and Type	Field and Description
private Expression	expression Use this Expression to perform initial evaluation

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
Object	evaluate(Context context) Returns an interator over the current context
String	toString() Returns something useful for logging
void	update(Context context, String newValue) Do nothing

Methods inherited from class java.lang.Object

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

Field Detail

expression

private Expression expression

Use this Expression to perform initial evaluation

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 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,
          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 String toString()

Returns something useful for logging

Overrides:

toString in class Object

Returns:

string useful for logging