@initbinder not working for specific model attribute

Question

I am using @valid and @initbinder for validation of the data being passed to the service but I am facing an issue that @InitBinder is working only globally,i.e.

Answer 1

@a-better-oliver's answer is great, but below is an another approach to the same problem with Spring, more verbose but typesafe:

@InitBinder
protected void initBinder(WebDataBinder binder){
  if (binder.getTarget() != null 
      && LoginRequest.class.equals(binder.getTarget().getClass())) {
    binder.setValidator(new LoginRequestValidator());
  }
}

This way we do not rely on the hard-coded string and also do not care how Spring exposes unnamed attributes.