textbender.g.hold
Class Spool0

java.lang.Object
  java.util.AbstractCollection<Hold>
      Spool0

All Implemented Interfaces:

Iterable<Hold>, Collection<Hold>, Spool

@ThreadSafe
public class Spool0
extends AbstractCollection<Hold>
implements Spool

Null implementation of a spool; it is always empty and never unwinds.

Field Summary

Fields inherited from interface Spool

catcher0

Constructor Summary

Spool0()

Method Summary

boolean	add(Hold hold) Does nothing.
static Spool0	i() A common instance of Spool0.
boolean	isUnwinding() Returns true if the spool is unwinding (or unwound).
Iterator<Hold>	iterator()
int	size()
boolean	unwind() Does nothing.
boolean	unwind(Catcher<Hold> catcher) Does nothing.

Methods inherited from class java.util.AbstractCollection

addAll, clear, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Collection

addAll, clear, contains, containsAll, equals, hashCode, isEmpty, remove, removeAll, retainAll, toArray, toArray

Constructor Detail

Spool0

public Spool0()

Method Detail

i

public static Spool0 i()

A common instance of Spool0.

add

public boolean add(Hold hold)

Does nothing.

Specified by:

add in interface Collection<Hold>

Specified by:

add in interface Spool

Overrides:

add in class AbstractCollection<Hold>

Returns:

true

iterator

public Iterator<Hold> iterator()

Specified by:

iterator in interface Iterable<Hold>

Specified by:

iterator in interface Collection<Hold>

Specified by:

iterator in class AbstractCollection<Hold>

size

public int size()

Specified by:

size in interface Collection<Hold>

Specified by:

size in class AbstractCollection<Hold>

Returns:

zero

isUnwinding

public boolean isUnwinding()

Description copied from interface: Spool

Returns true if the spool is unwinding (or unwound). Once true, it never reverts to false.

Specified by:

isUnwinding in interface Spool

Returns:

false

unwind

public boolean unwind()

Does nothing.

Specified by:

unwind in interface Spool

Returns:

false

unwind

public boolean unwind(Catcher<Hold> catcher)

Does nothing.

Specified by:

unwind in interface Spool

Parameters:

catcher - for any errors or exceptions that occur during unwinding

Returns:

false