Untitled

.orElseThrow(() -> new
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");
}
cart.getCartProducts().remove(selectedProduct);
cartProductRepository.delete(selectedProduct);
}
@Override
public void deleteAllProductsFromCart(String customerEmailId) throws
EKartCustomerCartException{
Optional<CustomerCart> cartOptional =
customerCartRepository.findByCustomerEmailId(customerEmailId);
CustomerCartcart=cartOptional
.orElseThrow(() -> new
EKartCustomerCartException("CustomerCartService.NO_CART_FOUND"));
if(cart.getCartProducts().isEmpty()){
throw new
EKartCustomerCartException("CustomerCartService.NO_PRODUCT_ADDED_TO_CART");
}
List<Integer>productIds=newArrayList<>();
cart.getCartProducts().parallelStream().forEach(cp->{
productIds.add(cp.getCartProductId());
cart.getCartProducts().remove(cp);
});
productIds.forEach(pid->{
cartProductRepository.deleteById(pid);
});
}
@Override
publicvoidmodifyQuantityOfProductInCart(StringcustomerEmailId,IntegerproductId,
Integerquantity)
throwsEKartCustomerCartException{
Optional<CustomerCart> cartOptional =
customerCartRepository.findByCustomerEmailId(customerEmailId);
CustomerCartcart=cartOptional
.orElseThrow(() -> new