org.apache.commons.collections
Interface OrderedMapIterator

All Superinterfaces:

Iterator, MapIterator, OrderedIterator

All Known Implementing Classes:

AbstractLinkedMap.LinkMapIterator, AbstractOrderedMapIteratorDecorator, DualTreeBidiMap.BidiOrderedMapIterator, EmptyOrderedMapIterator, UnmodifiableOrderedMapIterator

public interface OrderedMapIterator

extends MapIterator, OrderedIterator

Defines an iterator that operates over an ordered Map.

This iterator allows both forward and reverse iteration through the map.

Since:

Commons Collections 3.0

Version:

$Revision: 1.4 $ $Date: 2004/02/18 01:15:42 $

Author:

Stephen Colebourne

Method Summary

boolean	hasPrevious() Checks to see if there is a previous entry that can be iterated to.
Object	previous() Gets the previous key from the Map.

Methods inherited from interface org.apache.commons.collections.MapIterator

getKey, getValue, hasNext, next, remove, setValue

Method Detail

hasPrevious

public boolean hasPrevious()

Checks to see if there is a previous entry that can be iterated to.

Specified by:

hasPrevious in interface OrderedIterator

Returns:

true if the iterator has a previous element

previous

public Object previous()

Gets the previous key from the Map.

Specified by:

previous in interface OrderedIterator

Returns:

the previous key in the iteration

Throws:

NoSuchElementException - if the iteration is finished