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: 646777 $ $Date: 2008-04-10 14:33:15 +0200 (Thu, 10 Apr 2008) $
  Author:
    Stephen Colebourne

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `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

          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

          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

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