net.sf.beanlib.util.concurrent
Class LinkedBlockingDeque.AbstractItr

java.lang.Object
  net.sf.beanlib.util.concurrent.LinkedBlockingDeque.AbstractItr

All Implemented Interfaces:

Iterator<E>

Direct Known Subclasses:

LinkedBlockingDeque.DescendingItr, LinkedBlockingDeque.Itr

Enclosing class:

LinkedBlockingDeque<E>

private abstract class LinkedBlockingDeque.AbstractItr
extends Object
implements Iterator<E>

Base class for Iterators for LinkedBlockingDeque

Field Summary

private LinkedBlockingDeque.Node<E>	lastRet Node returned by most recent call to next.
(package private) LinkedBlockingDeque.Node<E>	next The next node to return in next
(package private) E	nextItem nextItem holds on to item fields because once we claim that an element exists in hasNext(), we must return item read under lock (in advance()) even if it was in the process of being removed when hasNext() was called.

Constructor Summary

LinkedBlockingDeque.AbstractItr()

Method Summary

(package private) abstract void	advance() Advances next, or if not yet initialized, sets to first node.
boolean	hasNext()
E	next()
void	remove()

Methods inherited from class java.lang.Object

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

Field Detail

next

LinkedBlockingDeque.Node<E> next

The next node to return in next

nextItem

E nextItem

nextItem holds on to item fields because once we claim that an element exists in hasNext(), we must return item read under lock (in advance()) even if it was in the process of being removed when hasNext() was called.

lastRet

private LinkedBlockingDeque.Node<E> lastRet

Node returned by most recent call to next. Needed by remove. Reset to null if this element is deleted by a call to remove.

Constructor Detail

LinkedBlockingDeque.AbstractItr

LinkedBlockingDeque.AbstractItr()

Method Detail

advance

abstract void advance()

Advances next, or if not yet initialized, sets to first node. Implemented to move forward vs backward in the two subclasses.

hasNext

public boolean hasNext()

Specified by:

hasNext in interface Iterator<E>

next

public E next()

Specified by:

next in interface Iterator<E>

remove

public void remove()

Specified by:

remove in interface Iterator<E>