How validate domain object in controller input filled by Spring Data?

Question

For example I have:

@PostMapping("/person/{id}")
@ResponseBody
public boolean isAdmin(@PathVariable("id") Person person) {
  return person != null && person.isAdmin();
}

How I can get same result using Validation?
This not works for me, but I look up for something like this, without manual checking in method body. Is there way for doing so?

@PostMapping("/person/{id}")
@ResponseBody
public boolean isAdmin(@PathVariable("id") @NotNull Person person) {
  return person.isAdmin();
}

Answer 1

you need to use javax.validation.Valid and add constraints to your Person pojo: javax.validation.constraints.Email/NotBlank/NotNull;

public class Person {

    @NotNull
    private Long id;
    /* here getters and setters...*/
}

In your controller:

@PostMapping("/person/{id}")
@ResponseBody
public boolean isAdmin(@Valid @RequestBody Person person) {
  return person.isAdmin();
}

see my github