/**
 * Class Node
 * 
 * A member of the the Cluster Engine
 */

package cluster
{
	import flash.display.Sprite;
	
	public class Node extends Sprite
	{
		protected var _siblings:Array = new Array();
		
		public function Node()
		{
			//
		}
		
		/**
		 * Return a clone of the array of siblings
		 */
		public function get siblings():Array
		{
			var arr:Array = new Array();
			while (arr.length < _siblings.length)
			{
				arr[arr.length] = _siblings[arr.length];
			}
			return arr;
		}
		
		/**
		 * Add a sibling to the list of the siblings, if it already 
		 * a member of the siblingList it isn't added.
		 */
		public function addSibling( node:Node ):void
		{
			if (_siblings.indexOf( node ) >= 0) return;
			
			_siblings.push( node );
		}
		
		/**
		 * Remove a sibling from the list of siblings, if it isn't 
		 * a member nothing is done.
		 */
		public function removeSibling( node:Node ):void
		{
			if (_siblings.indexOf( node ) >= 0) _siblings.splice( _siblings.indexOf( node ), 1 );
		}
	}
}