Customize mapping request parameters and fields inside the DTO ?

Question

I have the following class:

public class MyDTO { 

       private String kiosk;
       ...
}

and following url:

http://localhost:1234/mvc/controllerUrl?kiosk=false

and following controller method:

@RequestMapping(method = RequestMethod.GET, produces = APPLICATION_JSON)
@ResponseBody
public ResponseEntity<List<?>> getRequestSupportKludge(final MyDTO myDTO, BindingResult bindingResult) {
    ...
}

Now it is working nice and boolean field resolves properly.

Now url parameter has changed like this:

http://localhost:1234/mvc/controllerUrl?new_kiosk=false

I don't want to change parameter name inside the DTO. Is there way to say spring to understand that new_kiosk request parameter value should be put into kiosk field ?

Answer 1

Apart from setting an additional setter you can hande the case by making a custom argument resolver. There's a few ways you can go about it, but there's already a well discussed post. If I were you I would focus on the jkee's answer. Follow it step by step, and than all you should do is annotate your DTO with something like,

public class MyDTO { 

       @ParamName("new_kiosk")
       private String kiosk;
       ...
}

Note that even if you can't change MyDTO class, you can still follow a custom resolver route. In this post I've answered how you can write a parameter type annotation. Combining the two post you can easily come up with an annotation e.g. @ParamMapper that would define the mapping from request to properties. Think of something like

 getRequestSupportKludge(@ParamMapper("new_kiosk;kiosk") MyDTO myDTO, BindingResult bindingResult)