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EKartCustomerCartException("CustomerCartService.NO_CART_FOUND"));
if(cart.getCartProducts().isEmpty()){
throw new
EKartCustomerCartException("CustomerCartService.NO_PRODUCT_ADDED_TO_CART");
}
CartProductselectedProduct=null;
for(CartProductproduct:cart.getCartProducts()){
if(product.getProductId().equals(productId)){
selectedProduct=product;
}
}
if(selectedProduct==null){
throw new
EKartCustomerCartException("CustomerCartService.PRODUCT_ALREADY_NOT_AVAILABLE");
}
selectedProduct.setQuantity(quantity);
}
}