dk.rode.thesis.prototype
Class CountdownSequence

java.lang.Object
  dk.rode.thesis.meta.model.AbstractSequence<E>
      dk.rode.thesis.meta.model.ArraySequence<String>
          dk.rode.thesis.prototype.CountdownSequence

All Implemented Interfaces:

Sequence<String>, Copyable<Sequence<String>>, StrictCopyable<Sequence<String>>, Stringable<Sequence<String>>

@Participant(value="ConcretePrototype")
public class CountdownSequence
extends ArraySequence<String>

A non-copyable count-down sequence is a singleton sequence used for count-downs:

   Five, Four, Three, Two, One, FIRE! 
 

Invoking clone() will always throw a CloneNotSupportedException, and the copy() method returns the same instance.

A count-down sequence is bounded, consistent, and unique.

Author:

Gunni Rode / rode.dk

Nested Class Summary

Nested classes/interfaces inherited from interface dk.rode.thesis.meta.model.Sequence

Sequence.State

Field Summary

private static String[]	elements The various elements in a count-down sequence.
private static CountdownSequence	instance Single instance of the sequence, initialised thread-safe at class loading time.

Fields inherited from class dk.rode.thesis.meta.model.ArraySequence

index

Fields inherited from class dk.rode.thesis.meta.model.AbstractSequence

state

Constructor Summary

private

CountdownSequence() No-arg constructor.

Method Summary

CountdownSequence	clone() Always throws a CloneNotSupportedException.
CountdownSequence	copy() Returns a copy of this sequence that will start at the same sequence index as this sequence.
static CountdownSequence	getInstance() Returns the CountdownSequence instance to use.

Methods inherited from class dk.rode.thesis.meta.model.ArraySequence

bounded, consistent, current, equals, hashCode, next, reset, size, unique

Methods inherited from class dk.rode.thesis.meta.model.AbstractSequence

getStringablePolicy, state, toString, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface dk.rode.thesis.meta.model.Sequence

state

Methods inherited from interface dk.rode.thesis.strategy.Stringable

getStringablePolicy, toString

Field Detail

elements

private static final String[] elements

The various elements in a count-down sequence.

instance

private static final CountdownSequence instance

Single instance of the sequence, initialised thread-safe at class loading time.

Never null.

Constructor Detail

CountdownSequence

private CountdownSequence()

No-arg constructor.

Method Detail

clone

public CountdownSequence clone()
                        throws CloneNotSupportedException

Always throws a CloneNotSupportedException.

Overrides:

clone in class Object

Returns:

Never returns.

Throws:

CloneNotSupportedException - Always thrown.

copy

public CountdownSequence copy()

Description copied from interface: Sequence

Returns a copy of this sequence that will start at the same sequence index as this sequence.

Returns:

A copy of this sequence; never null.

getInstance

public static final CountdownSequence getInstance()

Returns the CountdownSequence instance to use.

Returns:

The sequence; never null.