this.orderLine = null;
}
private void addValidators() {
validation.addValidator(new NotNullValidator(Product.class,
"productNumber"));
validation.addValidator(new NotNullValidator(Product.class, "price"));
validation.addValidator(new NotNullValidator(Product.class, "inStock"));
validation
.addValidator(new NotNullValidator(Product.class, "orderable"));
validation.addValidator(new NotNullValidator(Product.class,
"minimalQuantity"));
}