writeattributes
Class AddressEdit.PriorityQueue.PQIterator

java.lang.Object
  writeattributes.AddressEdit.PriorityQueue.PQIterator

All Implemented Interfaces:

java.util.Iterator

Enclosing class:

AddressEdit.PriorityQueue

private class AddressEdit.PriorityQueue.PQIterator
extends java.lang.Object
implements java.util.Iterator

Priority queue iterator.

An instance of this iterator can work in either the upward or downward direction. An upward iterator starts at queue element zero and returns queue elements at increasing indices. A downward iterator starts with the largest index and moves to lower indices.

Field Summary

private int	current
private int	end
private int	generation
private int	increment
private AddressEdit.PriorityQueue	queue
private int	start

Constructor Summary

AddressEdit.PriorityQueue.PQIterator(int direction, AddressEdit.PriorityQueue queue)
Constructor.

Method Summary

boolean	hasNext() Is there another element to read?
java.lang.Object	next() Return next element, moving in desired direction.
void	remove() Remove an element from the underlying collection.

Methods inherited from class java.lang.Object

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

Field Detail

queue

private final AddressEdit.PriorityQueue queue

start

private final int start

end

private final int end

increment

private final int increment

generation

private final int generation

current

private int current

Constructor Detail

AddressEdit.PriorityQueue.PQIterator

public AddressEdit.PriorityQueue.PQIterator(int direction,
                                            AddressEdit.PriorityQueue queue)

Constructor.

Create an up iterator if the argument is greater than or equal to zero, otherwise create a down iterator.

Parameters:

direction - negative for down, otherwise up

queue - the priority queue to walk

Throws:

java.lang.IllegalArgumentException - if queue is null

Method Detail

hasNext

public boolean hasNext()

Is there another element to read?

Specified by:

hasNext in interface java.util.Iterator

Returns:

true if next() won't throw an exception

Throws:

java.util.ConcurrentModificationException - if queue has been modified underneath iterator

next

public java.lang.Object next()

Return next element, moving in desired direction.

Specified by:

next in interface java.util.Iterator

Returns:

next AttributeRegion in the queue

Throws:

java.util.ConcurrentModificationException - if queue has been modified underneath iterator

remove

public void remove()

Remove an element from the underlying collection.

Not supported.

Specified by:

remove in interface java.util.Iterator

Throws:

java.lang.UnsupportedOperationException