Is NotNull needed on Kotlin?

Question

I have a class:

class User(

    var name: String

)

And a mapped post request:

@PostMapping("/user")
fun test(@Valid @RequestBody user: User) {
    //...
}

What if a client will send a JSON of a user with name: null? Will it be rejected by the MVC Validator or an exception will be throwed? Should I annotate name with @NotNull? Unfortunately, I cannot check that because only can write tests (it is not available to create User(null)).

Answer 1

As I tested, @NotNull doesn't affect on the MVC validation at all. You will only receive a WARN message in console which is normal:

Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: Could not read document: Instantiation of...