org.apache.commons.betwixt.expression
Class StringExpression

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

All Implemented Interfaces:

Expression

public class StringExpression
extends java.lang.Object
implements Expression

StringExpression returns the current context object as a string.

Version:

$Revision: 438373 $

Author:

James Strachan

Constructor Summary

StringExpression()
Base constructor.

Method Summary

java.lang.Object	evaluate(Context context) Return the context bean as a string
static StringExpression	getInstance() Gets the singleton
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

StringExpression

public StringExpression()

Base constructor. Should this be private?

Method Detail

getInstance

public static StringExpression getInstance()

Gets the singleton

Returns:

the singleton StringExpression instance

evaluate

public java.lang.Object evaluate(Context context)

Return the context bean as a string

Specified by:

evaluate in interface Expression

Parameters:

context - evaluate expression against this context

Returns:

the toString() representation of the context bean

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:

the (short) class name