Create Sales Order X++

public class SalesOrderDemo
{
    private void new()
    {
    }
 
    public static SalesOrderDemo construct()
    {
        return new SalesOrderDemo();
    }
 
    public void createSalesOrder()
    {
        SalesTable salesTable;
        SalesLine salesLine;
        CustTable custTable= CustTable::find("US-007");
        AxSalesTable axsalesTable;
        AxSalesLine axSalesLine;
        SalesFormLetter salesFormLetter;
        NumberSeq numberSeq;
        #OCCRetryCount
        if (! this.validate())
        throw error("");
 
        try
        {
        ttsbegin;
 
        //Create Sales order
 
        // ttsBegin;
        numberSeq = NumberSeq::newGetNum(SalesParameters::numRefSalesId());
        numberSeq.used();
 
        salesTable.SalesId = numberSeq.num();
        salesTable.initValue();
        salesTable.CustAccount = 'US-007';
        salesTable.initFromCustTable();
        salesTable.InventSiteId = '1';
        salesTable.InventLocationId = '11';
 
        if (!salesTable.validateWrite())
        {
        throw Exception::Error;
        }
        salesTable.insert();
        //ttsCommit;
        info(strFmt("Sales order '%1' has been created", salesTable.SalesId));
 
        while select tmpFromVirtual
        {
        salesLine.clear();
        salesLine.initFromSalesTable(salesTable);
        salesLine.SalesId = salesTable.SalesId;
        salesLine.ItemId = tmpFromVirtual.ItemId;
        salesLine.createLine(true, true, true, true, true, true);
        }
        if (1)
        {
        throw error('canceled');
        }
        //SO confirmation
        salesFormLetter = SalesFormLetter::construct(DocumentStatus::Confirmation);
        salesFormLetter.update(salesTable);
 
        // SO invoicing
        salesFormLetter = salesFormLetter::construct(DocumentStatus::Invoice);
        salesFormLetter.update(salesTable);
        ttscommit;
        }
        catch (Exception::Deadlock)
        {
        retry;
        }
        catch (Exception::UpdateConflict)
        {
        if (appl.ttsLevel() == 0)
        {
        if (xSession::currentRetryCount() >= #RetryNum)
        {
 
        throw Exception::UpdateConflictNotRecovered;
        }
        else
        {
        retry;
        }
        }
        else
        {
        throw Exception::UpdateConflict;
        }
    }
}