edu.luc.cs.trull
Class Nil

java.lang.Object
  edu.luc.cs.trull.EmptyComponent
      edu.luc.cs.trull.Nil

All Implemented Interfaces:

Component, PropertyChangeSource, Startable, Suspendable, Terminating, java.beans.PropertyChangeListener, java.util.EventListener

public class Nil
extends EmptyComponent

A basic component does nothing but never terminates. Only one instance of this component is required.

Field Summary

private static Nil

INSTANCE The instance of this component.

Constructor Summary

protected

Nil() Sole constructor.

Method Summary

static Nil

getInstance() Returns the sole instance of this component.

Methods inherited from class edu.luc.cs.trull.EmptyComponent

addPropertyChangeListener, getPropertyChangeListeners, getTerminationListener, propertyChange, removePropertyChangeListener, resume, setTerminationListener, start, stop, suspend

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

private static final Nil INSTANCE

The instance of this component.

Constructor Detail

Nil

protected Nil()

Sole constructor.

Method Detail

getInstance

public static Nil getInstance()

Returns the sole instance of this component.

Returns:

the sole instance of this component.