The optional long parameter 'id' is present but cannot be set to null

I have two methods in my Spring controller:

    @RequestMapping(method = RequestMethod.GET, value = CARD_PATH)
    public @ResponseBody List<BaseballCard> getAllCards()

    @RequestMapping(method = RequestMethod.GET, value = CARD_PATH + "/{id}")
    public BaseballCard getCard(@PathVariable("id") long id)

      

        
        
        
      

    

I am getting the following error when issuing an HTTP request for GET /bbct/api/v1.0/card/1

.

The optional long parameter 'id' is present, but cannot be cast to null due to the fact that it is declared as a primitive type.

The proposal is to declare id

how Long

; however, I would prefer not to.

I wonder why Spring considers the parameter to be id

optional? Since I have another method that handles requests when the ID is missing, the ID was necessarily provided if the request was sent to getCard()

.

Here is the complete controller:

@Controller
public class BaseballCardController {

    private static final String CARD_PATH = "/bbct/api/v1.0/card";

    private List<BaseballCard> cards = new ArrayList<BaseballCard>();

    @RequestMapping(method = RequestMethod.POST, value = CARD_PATH)
    public @ResponseBody
    BaseballCard addCard(@RequestBody BaseballCard card) {
        cards.add(card);
        card.setId(cards.size());
        return card;
    }

    @RequestMapping(method = RequestMethod.GET, value = CARD_PATH)
    public @ResponseBody List<BaseballCard> getAllCards() {
        return cards;
    }

    @RequestMapping(method = RequestMethod.GET, value = CARD_PATH + "/{id}")
    public BaseballCard getCard(@PathVariable("id") long id) {
        return cards.get((int)(id - 1));
    }

}