@RequestMapping(value = "/add", method = RequestMethod.POST)
    public String processAddNewProductForm(@ModelAttribute("newProduct") Product productToBeAdded, BindingResult result,
            HttpServletRequest request) {
        String[] suppressedFields = result.getSuppressedFields();
        if (suppressedFields.length > 0) {
            throw new RuntimeException("Attempting to bind disallowed fields: "
                    + StringUtils.arrayToCommaDelimitedString(suppressedFields));
        }
        MultipartFile productImage = productToBeAdded.getProductImage();
        String rootDirectory = request.getSession().getServletContext().getRealPath("/");
        if (productImage != null && !productImage.isEmpty()) {
            try {
                productImage.transferTo(
                        new File(rootDirectory + "/resources/images/" + productToBeAdded.getProductId() + ".png"));
            } catch (Exception e) {
                throw new RuntimeException("Product Image saving failed", e);
            }
        }

        MultipartFile pdfManual = productToBeAdded.getPdfManual();
        if (pdfManual != null && !pdfManual.isEmpty()) {
            try {
                pdfManual.transferTo(
                        new File(rootDirectory + "/resources/pdfManuals/" + productToBeAdded.getPdfManual() + ".pdf"));
            } catch (Exception e) {
                throw new RuntimeException("Product manual saving failed", e);
            }
        }

        productService.addProduct(productToBeAdded);
        return "redirect:/products";
    }