Should you use @NotNull and @JsonProperty(required) in the same object

Question

So I'm looking at adding constraints to my json views.

I have class similar to this one

public class Person {
    @JsonProperty(required = true)
    @NotNull
    @Size(max = 50)
    private String name;
}

Should I keep both @JsonProperty(required = true) and @NotNull or should I remove one and why?

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Just to be clear since Jackson 2.6 @JsonProperty(required = true) does throw an exception.

I'm using springfox-swagger and it looks like when I remove @JsonProperty(required = true) the field in the swagger is marked as optional which it isn't.

I'm just wondering about the best practice in this situation.

Answer 1

When using @JsonProperty with required set to true on a field or method, Jackson won't perform any validation. See the documentation for further details.

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For validation purposes, consider @NotNull from Bean Validation (a validation provider such as Hibernate Validator is required to perform the validation).

With Swagger, you also can use @ApiModelProperty and set required to true to indicate that a field is mandatory.