Btw, your example seems wrong as well.

public class TestCase {
  public static void main(String[] args) {
    MyService myService = new MyServiceImpl(); 
    myService.setGreeting("Hello");
    Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
    validator.validate(myService); // throws IllegalArgumentException - wrong number of arguments
  }
}

does not even compile, because there is no setGreeting on MyService. If I change the code like seen below it works as expected.

public class TestCase {
  public static void main(String[] args) {
    MyServiceImpl myService = new MyServiceImpl(); 
    myService.setGreeting("Hello");
    Validator validator = Validation.buildDefaultValidatorFactory().getValidator();
    validator.validate(myService); // throws IllegalArgumentException - wrong number of arguments
  }
}

Could you please refine your example?

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