Get field name when javax.validation.ConstraintViolationException is thrown

Question

When the PathVariable 'name' doesn't pass validation a javax.validation.ConstraintViolationException is thrown. Is there a way to retrieve the parameter name in the thrown javax.validation.ConstraintViolationException?

@RestController @Validated public class HelloController {  @RequestMapping("/hi/{name}") public String sayHi(@Size(max = 10, min = 3, message = "name should    have between 3 and 10 characters") @PathVariable("name") String name) {   return "Hi " + name; } 

Answer 1

If you inspect the return value of getPropertyPath(), you'll find it'a Iterable<Node> and the last element of the iterator is the field name. The following code works for me:

// I only need the first violation ConstraintViolation<?> violation = ex.getConstraintViolations().iterator().next(); // get the last node of the violation String field = null; for (Node node : violation.getPropertyPath()) {     field = node.getName(); }