title: @initbinder not working for specific model attribute
body: <p>I am using @valid and @initbinder for validation of the data being passed to the service but I am facing an issue that <code>@InitBinder</code> is working only globally,i.e. </p>
  
  <pre><code>@InitBinder // possible to leave off for global behavior
  protected void initBinder(WebDataBinder binder){
      binder.setValidator(new LoginRequestValidator());
  }
  </code></pre>
  
  <p>and not for a particular model attribute like I have an model object named LoginRequest :</p>
  
  <pre><code>@InitBinder("LoginRequest") // possible to leave off for global behavior
  protected void initBinder(WebDataBinder binder){
      binder.setValidator(new LoginRequestValidator());
  }
  </code></pre>
  
  <p>In this case the validator is not being called at all.. is this the right way to do this? or am I missing something?</p>