How to display sub itemes for each orderitem in invoce

HI

I want to know is it possible to display OrderItem Sub itemes in invoice?

Scenario :

Say we sell online ticket that user can buy.tickets have types and each type have it's own set of codes that is defined via a customtable(ex: customtable_ticketcode). for each type of ticket customer add to his shoppingcart we must pick a number of codes from customtable_ticketcode table based on number of units ordered by customer and display code(s) right below orderitem(ticket) in invoice.

A : one way is overriding GetShoppingCartResolverInternal method such as below :

protected override MacroResolver GetShoppingCartResolverInternal(ShoppingCartInfo cart, bool specialMacros)
{
    MacroResolver resolver = base.GetShoppingCartResolverInternal(cart, specialMacros);
    DataTable dt = null;
    if (!OrderHasBarcode(cart))
    {
        // is cart created from an existing order
        if (cart.Order != null && cart.Order.OrderIsPaid)
        {
            InfoDataSet<OrderItemInfo> ds = OrderItemInfoProvider.GetOrderItems(cart.Order.OrderID);
            if (!DataHelper.DataSourceIsEmpty(ds))
            {
                foreach (OrderItemInfo oii in ds)
                {
                    DataSet barCodes = GetNewTicketBarcodes(oii, cart);
                    if (!DataHelper.DataSourceIsEmpty(barCodes))
                    {
                        if (dt == null)
                        {
                            DataColumn[] columns = new DataColumn[barCodes.Tables[0].Columns.Count];
                            barCodes.Tables[0].Columns.CopyTo(columns, 0);
                            dt = GetDataTable(columns);
                        }
                        foreach (DataRow dr in barCodes.Tables[0].Rows)
                        {
                            int itemId = ValidationHelper.GetInteger(dr["ItemID"], 0);
                            CustomTableItem barcode = TicketBarcodeProvider.GetItem(itemId, TicketBarcodeTableClass.ClassName);
                            barcode.SetValue("APTicketTypeOrderID", cart.Order.OrderID);
                            barcode.SetValue("APTicketTypeOrderItemID", oii.OrderItemID);
                            barcode.SetValue("APTicketTypeStatus", "USED");
                            barcode.Update();
                            dt.Rows.Add(dr.ItemArray);
                        }
                    }
                }
                if (dt != null)
                {
                    resolver.SetNamedSourceData("BarcodeTable", dt.Rows);
                }
            }
        }
    }
    else
    {
        DataSet ds = GetTicketBarcodes(cart);
        resolver.SetNamedSourceData("BarcodeTable", ds.Tables[0].Rows);
    }
    return resolver;
}

in this way we can not display Codes that belong to OrderItem right below it by using ApplyTransformation.it display all codes below each order item. NOTE : inside ContentTable item transformation we call BarcodeTable.ApplyTransformation("ecommerce.transformations.barcode_Table").inside barcode_Table transformation we don't have access to OrderItemID to specifiy that only display bacodes for this orderitem.

B : Display all codes right after all cart itemes displayed.(not the case)

Is there any other toimplement this?