com.sun.sgs.app.util
Class ScalableList.ScalableListNodeIterator<E>

java.lang.Object
  com.sun.sgs.app.util.ScalableList.ScalableListNodeIterator<E>

Type Parameters:

E - the type of element stored in the ScalableList

All Implemented Interfaces:

Serializable, Iterator<ScalableList.ListNode<E>>

Enclosing class:

ScalableList<E>

static class ScalableList.ScalableListNodeIterator<E>
extends Object
implements Serializable, Iterator<ScalableList.ListNode<E>>

This iterator walks through the ListNode<E>s which parent the SubLists. An iterator for this type of element is necessary to support the other element iterator as well as indexOf() operations.

Constructor Summary

ScalableList.ScalableListNodeIterator(ScalableList.ListNode<E> head)
Constructor to create a new iterator.

Method Summary

boolean	hasNext() Determines if there is a next element to iterate over; that is, if the next ListNode is not null.
boolean	hasPrev() Determines if there is a previous element to iterate over; that is, if the previous ListNode is not null.
ScalableList.ListNode<E>	next() Returns the next ListNode<E> in order from the list
ScalableList.ListNode<E>	prev() Returns the previous ListNode<E> in order from the list
void	remove() Deprecated. this operation is not supported because the ScalableList only removes elements explicitly, not ListNodes.

Methods inherited from class java.lang.Object

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

Constructor Detail

ScalableList.ScalableListNodeIterator

ScalableList.ScalableListNodeIterator(ScalableList.ListNode<E> head)

Constructor to create a new iterator.

Parameters:

head - the head ListNode from which to begin iterating

Method Detail

hasNext

public boolean hasNext()

Determines if there is a next element to iterate over; that is, if the next ListNode is not null.

Specified by:

hasNext in interface Iterator<ScalableList.ListNode<E>>

Returns:

true if the next element is not null, and false otherwise

next

public ScalableList.ListNode<E> next()

Returns the next ListNode<E> in order from the list

Specified by:

next in interface Iterator<ScalableList.ListNode<E>>

Returns:

the next ListNode

Throws:

NoSuchElementException - if there exists no next sibling

hasPrev

public boolean hasPrev()

Determines if there is a previous element to iterate over; that is, if the previous ListNode is not null.

Returns:

true if the previous element is not null, and false otherwise

prev

public ScalableList.ListNode<E> prev()

Returns the previous ListNode<E> in order from the list

Returns:

the previous ListNode

Throws:

NoSuchElementException - if there exists no previous sibling

remove

public void remove()

Deprecated. this operation is not supported because the ScalableList only removes elements explicitly, not ListNodes.

Specified by:

remove in interface Iterator<ScalableList.ListNode<E>>

Throws:

UnsupportedOperationException - the operation is not supported