net.sourceforge.xwing
Class NullSourceSink

java.lang.Object
  net.sourceforge.xwing.AbstractSourceSink
      net.sourceforge.xwing.NullSourceSink

All Implemented Interfaces:

SourceSink

public class NullSourceSink

extends AbstractSourceSink

A SourceSink whose value is always null.

Version:

$Revision: 1.2 $

Author:

Scott Howlett

Constructor Summary

NullSourceSink()

Method Summary

Object	get() Return null.
void	set(Object newValue) Do nothing.

Methods inherited from class net.sourceforge.xwing.AbstractSourceSink

addChangeListener, fireStateChanged, removeChangeListener

Methods inherited from class java.lang.Object

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

Constructor Detail

NullSourceSink

public NullSourceSink()

Method Detail

get

public Object get()

Return null.

Returns:

a value.

set

public void set(Object newValue)

Do nothing. Never causes a ChangeEvent to be broadcast because null never changes.

Parameters:

newValue - The value to be stored. In general, if a value is stored via set(), the value retrieved by a subsequent get() call will equal the set value as defined by the value's equals() method.