votorola.g.hold

Class Spool1

java.lang.Object

Spool1

All Implemented Interfaces:

Spool

public final class Spool1
extends Object
implements Spool

An implementation of a spool based on a linked list.

Field Summary

Fields inherited from interface Spool

CATCHER_0

Constructor Summary

Constructors

Constructor and Description
Spool1()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(Hold hold) Adds the hold to the spool or releases it immediately.
boolean	isUnwinding() Returns true if the spool is unwinding or already unwound.
boolean	unwind() Commences to unwind this spool.
boolean	unwind(Catcher<Hold> catcher) Commences to unwind this spool, removing and releasing each of its holds.

Methods inherited from class java.lang.Object

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

Constructor Detail

Spool1

public Spool1()

Method Detail

add

public boolean add(Hold hold)

Description copied from interface: Spool

Adds the hold to the spool or releases it immediately. If the spool is unwinding then the hold is released immediately, otherwise it is added.

Specified by:

add in interface Spool

Returns:

true if the hold is added; false if it is released instead.

isUnwinding

public boolean isUnwinding()

Description copied from interface: Spool

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

Specified by:

isUnwinding in interface Spool

unwind

public boolean unwind()

Description copied from interface: Spool

Commences to unwind this spool. Equivalent to unwind(CATCHER_0).

Specified by:

unwind in interface Spool

Returns:

true if unwinding commences with this call; false if it had already commenced.

unwind

public boolean unwind(Catcher<Hold> catcher)

Description copied from interface: Spool

Commences to unwind this spool, removing and releasing each of its holds. Works in LIFO order. Once unwinding is commenced, subsequent calls to this method have no effect.

Specified by:

unwind in interface Spool

Parameters:

catcher - the catcher for any errors or exceptions that occur during unwinding.

Returns:

true if unwinding commences with this call; false if it had already commenced.