Ax7 form DataSource level OnValidating Event Handler and FormDataFieldEventArgs Conditions

class NEC_RetailPeriodicDiscountFormEventHandler
{

    /// <summary>
    ///
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    [FormDataFieldEventHandler(formDataFieldStr(RetailPeriodicDiscount, RetailPeriodicDiscountLine, DiscountPercentOrValue), FormDataFieldEventType::Validating)]
    public static void DiscountPercentOrValue_OnValidating(FormDataObject sender, FormDataFieldEventArgs e)
    {
        InventTable                                     inventTable;
        InventTableModule                               inventTableModule;
        EcoResProduct                                   ecoResProduct;
        FormRun                                         formRun = sender.datasource().formRun();
       
        FormDataSource                                  RetailDiscountLineMixAndMatch_ds = FormRun.dataSource(formDataSourceStr(RetailPeriodicDiscount, RetailPeriodicDiscountLine_RetailDiscountLineMixAndMatch));
        RetailDiscountLineMixAndMatch                   RetailDiscountLineMixAndMatch = RetailDiscountLineMixAndMatch_ds.cursor();
        FormDataFieldCancelEventArgs                    args = e as FormDataFieldCancelEventArgs;
        FormDataSource                                  formDataSource = sender.datasource();
        RetailPeriodicDiscountLine                      retailPeriodicDiscountLine = formDataSource.cursor();
        FormReferenceGroupControl                       RetailGroupMemberLine_Product = formRun.design(0).controlName('RetailGroupMemberLine_Product');
       
        if(RetailDiscountLineMixAndMatch.discountType  == retaildealpricediscountpctbase::dealprice)
        {

            select  inventTableModule
                exists join inventTable
                    where inventTableModule.ItemId == inventTable.ItemId
                    && inventTableModule.ModuleType == ModuleInventPurchSales::Sales
                    exists join EcoResProduct
                        where inventTable.Product == RetailGroupMemberLine_Product.value();
            if (inventTableModule.ItemId  && inventTableModule.Price < retailPeriodicDiscountLine.DiscountPercentOrValue)
            {
                boolean doCancel =!checkFailed("Deal price cannot exceeds the base sale price");
                args.cancel(doCancel);
            }
        }
    }

    /// <summary>
    ///
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    [FormDataFieldEventHandler(formDataFieldStr(RetailPeriodicDiscount, RetailPeriodicDiscountLine_RetailDiscountLineOffer, discAmount), FormDataFieldEventType::Validating)]
    public static void discAmount_OnValidating(FormDataObject sender, FormDataFieldEventArgs e)
    {
        InventTable                             inventTable;
        InventTableModule                       inventTableModule;
        EcoResProduct                           ecoResProduct;
        FormDataFieldCancelEventArgs            args = e as FormDataFieldCancelEventArgs;

        FormRun                                 formRun = sender.datasource().formRun();
        FormDataSource                          RetailDiscountlineoffer_ds = sender.datasource();
        RetailDiscountLineOffer                 retailDiscountLineOffer = RetailDiscountlineoffer_ds.cursor();
        FormReferenceGroupControl               RetailGroupMemberLine_Product = formRun.design(0).controlName('RetailGroupMemberLine_Product');

        if(retailDiscountLineOffer.discountMethod == RetailDiscountOfferLineDiscMethodBase::AmountOff)
        {
            select  inventTableModule
                exists join inventTable
                    where inventTableModule.ItemId == inventTable.ItemId
                    && inventTableModule.ModuleType == ModuleInventPurchSales::Sales
                    exists join EcoResProduct
                        where inventTable.Product == RetailGroupMemberLine_Product.value();
            if (inventTableModule.ItemId  && inventTableModule.Price < retailDiscountLineOffer.discAmount)
            {
                boolean doCancel =!checkFailed("Cash discount Amount cannot exceeds the base sale price");
                args.cancel(doCancel);
            }
        }
    }

    /// <summary>
    ///
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    [FormDataFieldEventHandler(formDataFieldStr(RetailPeriodicDiscount, RetailPeriodicDiscountLine_RetailDiscountLineOffer, offerPrice), FormDataFieldEventType::Validating)]
    public static void offerPrice_OnValidating(FormDataObject sender, FormDataFieldEventArgs e)
    {
        InventTable                             inventTable;
        InventTableModule                       inventTableModule;
        EcoResProduct                           ecoResProduct;
        FormDataFieldCancelEventArgs            args = e as FormDataFieldCancelEventArgs;

        FormRun                                 formRun = sender.datasource().formRun();
        FormDataSource                          RetailDiscountlineoffer_ds = sender.datasource();
        RetailDiscountLineOffer                 retailDiscountLineOffer = RetailDiscountlineoffer_ds.cursor();
        FormReferenceGroupControl               RetailGroupMemberLine_Product = formRun.design(0).controlName('RetailGroupMemberLine_Product');

        if( retailDiscountLineOffer.discountMethod == RetailDiscountOfferLineDiscMethodBase::Price)
        {
            select  inventTableModule
                exists join inventTable
                    where inventTableModule.ItemId == inventTable.ItemId
                    && inventTableModule.ModuleType == ModuleInventPurchSales::Sales
                    exists join EcoResProduct
                        where inventTable.Product == RetailGroupMemberLine_Product.value();
            if (inventTableModule.ItemId && inventTableModule.Price < retailDiscountLineOffer.offerPrice )
            {
                boolean doCancel =!checkFailed("Discount Price cannot exceeds the base sale price");
                args.cancel(doCancel);
            }
        }
    }

}