topical media & game development

topical media & game development

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

lib-as-de-polygonal-ds-DListIterator.ax

lib-as-de-polygonal-ds-DListIterator.ax (swf ) [ flash ] flex

Copyright (c) Michael Baczynski 2007 http://lab.polygonal.de/ds/ This software is distributed under licence. Use of this software implies agreement with all terms and conditions of the accompanying software licence.


  
  package de.polygonal.ds
  {
          import de.polygonal.ds.DListNode;
          import de.polygonal.ds.DLinkedList;

A list iterator.


  
          public class @ax-lib-as-de-polygonal-ds-DListIterator implements Iterator
          {

The node the iterator is pointing to.


  
                  public var node:DListNode;

The list of the iterator is referenced.


  
                  public var list:DLinkedList;

Initializes a new @ax-lib-as-de-polygonal-ds-DListIterator instance pointing to a given node. Usually created by invoking SLinkedList.getIterator().
parameter: list The linked list the iterator should use.
parameter: node The iterator's initial node.


  
                  public function @ax-lib-as-de-polygonal-ds-DListIterator(list:DLinkedList, node:DListNode = null)
                  {
                          this.list = list;
                          this.node = node;
                  }

Moves the iterator to the start of the list.


  
                  public function start():void
                  {
                          node = list.head;
                  }

Returns the current node's data while moving the iterator forward by one position.


  
                  public function next():*
                  {
                          if (hasNext())
                          {
                                  var obj:* = node.data;
                                  node = node.next;
                                  return obj;
                          }
                          return null;
                  }

Checks if the next node exists.


  
                  public function hasNext():Boolean
                  {
                          return Boolean(node);
                  }

Read/writes the current node's data.
returns: The data.


  
                  public function get data():*
                  {
                          if (node) return node.data;
                          return null;
                  }
                  
                  public function set data(obj:*):void
                  {
                          node.data = obj;
                  }

Moves the iterator to the end of the list.


  
                  public function end():void
                  {
                          node = list.tail;
                  }

Moves the iterator to the next node.


  
                  public function forth():void
                  {
                          if (node) node = node.next;
                  }

Moves the iterator to the previous node.


  
                  public function back():void
                  {
                          if (node) node = node.prev;
                  }

Checks if the current referenced node is valid.
returns: True if the node exists, otherwise false.


  
                  public function valid():Boolean
                  {
                          return Boolean(node);
                  }

Removes the node the iterator is pointing to.


  
                  public function remove():void
                  {
                          list.remove(this);
                  }

Returns a string representing the current object.


  
                  public function toString():String
                  {
                          return "{@ax-lib-as-de-polygonal-ds-DListIterator, data=" + (node ? node.data : "null") + "}";
                  }
          }
  }

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

You may not copy or print any of this material without explicit permission of the author or the publisher. In case of other copyright issues, contact the author.