public function checkInsertOrderProducts(&$objFormParam, $arrProductClassIds, $insert_product_class_id, $arrAddProductInfo)
    {
        if (!$arrProductClassIds || !in_array($insert_product_class_id, $arrProductClassIds)) {
            $arrAddProducts = array();
            $arrTax = SC_Helper_TaxRule_Ex::getTaxRule(0, $insert_product_class_id);

            $arrAddProductInfo['product_name'] = ($arrAddProductInfo['product_name'])
                ? $arrAddProductInfo['product_name']
                : $arrAddProductInfo['name'];

            $arrAddProductInfo['price'] = ($arrAddProductInfo['price'])
                ? $arrAddProductInfo['price']
                : $arrAddProductInfo['price02'];

            $arrAddProductInfo['quantity'] = 1;
            $arrAddProductInfo['tax_rate'] = ($objFormParam->getValue('order_tax_rate') == '')
                ? $arrTax['tax_rate']
                : $objFormParam->getValue('order_tax_rate');

            $arrAddProductInfo['tax_rule'] = ($objFormParam->getValue('order_tax_rule') == '')
                ? $arrTax['tax_rule']
                : $objFormParam->getValue('order_tax_rule');

            foreach ($this->arrProductKeys as $insert_key) {
                $value = $objFormParam->getValue($insert_key);
                $arrAddProducts[$insert_key]   = (is_array($value))? $value: array();
/* changed
                $arrAddProducts[$insert_key][] = $arrAddProductInfo[$insert_key];
changed */
                $arrWorkProducts = array();
                $cnt = 0;
                foreach ($arrAddProducts[$insert_key] as $data) {
                    $arrWorkProducts[] = $data;
                    if ($cnt == $objFormParam->getValue('no')) {
                        $arrWorkProducts[] = $arrAddProductInfo[$insert_key];
                    }
                    $cnt++;
                }
                $arrAddProducts[$insert_key] = $arrWorkProducts;
// changed
            }

            return $arrAddProducts;
        } else {
            //受注商品の数量は、複数配送側の集計で出しているので、重複しても数量を増やさない。
            return null;
        }
    }