//****************************************************************************
//Copyright (C) 2005 www.flashshe.com
//author:jackyshe

//****************************************************************************

class com.flashshe.ArrayList{

	public function ArrayList(a:Array)
	{
		if(a != undefined) items = a;
		else items = new Array();
		
	}

//------------------------------------------------------------------------------

	public function addItem( item:Object ):Boolean
	{
		if ( item == null )
			return false;

		items.push( item );
		return true;
	}

//------------------------------------------------------------------------------

	public function addItemAt(index:Number, value:Object):Void
	{
		if (index<length) {
			items.splice(index, 0, value);
		} else if (index>length) {
			trace("Cannot add an item past the end of the DataProvider");
			return;
		}
	}

//------------------------------------------------------------------------------	

	public function addItemsAt(index:Number, newItems:Array):Void
	{
		if (index<length) {
			for(var i=0;i<newItems.length;i++){
				items.splice(index+i, 0, newItems[i]);
			}
			
		} else if (index>length) {
			trace("Cannot add an item past the end of the DataProvider");
			return;
		}
	}
	
//------------------------------------------------------------------------------	

	public function replaceItemAt(index:Number, itemObj:Object):Void
	{
		if (index<0 || index>=length) {
			return;
		}
		items[index] = itemObj;
	}
	
//------------------------------------------------------------------------------

	public function removeAll():Void
	{
		items = new Array();
	}

//------------------------------------------------------------------------------

	public function contains(item:Object):Boolean
	{
		return ( getItemIndex( item ) > -1 );
	}

//------------------------------------------------------------------------------

	public function getItemAt(index:Number):Object
	{
		return ( items[ index ] );
	}

//------------------------------------------------------------------------------

	public function isEmpty():Boolean
	{
		return ( items.length == 0 );
	}

//------------------------------------------------------------------------------

	public function removeItem( item:Object ):Boolean
	{
	   var itemIndex:Number = getItemIndex( item );
		if ( itemIndex < 0 )
			return false;

		items.splice( itemIndex, 1 );
		return true;
	}
	
//------------------------------------------------------------------------------

	public function removeItemsAt(index:Number, len:Number):Boolean
	{
	   if (index<length) items.splice(index, len);			
	   else if (index>length) {
			trace("Cannot add an item past the end of the DataProvider");
			return;
		}
	}

//------------------------------------------------------------------------------

	public function toArray() : Array
	{
		return items;
	}
	
//------------------------------------------------------------------------------

	public function getItemIndex( item:Object ):Number
	{
		for ( var i=0; i<items.length; i++ )
		{
			if ( items[ i ] == item )
				return i;
		}
		return -1;
	}
	
//------------------------------------------------------------------------------

	private var items:Array;
	
//------------------------------------------------------------------------------

	function get length():Number{
		return items.length;
	}
}