JAVA EE Rest conditional GET methods on QueryParams

Question

I would like to have two GET methods on my Rest resource class. one would react if query param has value1 and second on value2

Lets say:

@Path("/myApi")
public class MyApiService {

     @GET
     @Produces(MediaType.APPLICATION_JSON)
     public Response methodOne(...) {
         ...
         return ...;
     }

     @GET
     @Produces(MediaType.APPLICATION_JSON)
     public Response methodTwo(...) {
         ...
         return ...;   
     }

How to achieve conditional routing for query params

I would like to methodOne() reacts if QueryParam is ?type=one and methodTwo() if QueryParam is ?type=two

One option is to use [Sub-Resource Locators](http://stackoverflow.com/a/28978111/2587435) — Paul Samsotha, Apr 08 '15 at 13:47
@Tichodroma I would like to separate methods, so in for example in swagger you could see more methods. I think methods per different query param isnt so stupid as it looks like... — To Kra, Apr 09 '15 at 14:43

score 0 · Answer 1 · answered Apr 08 '15 at 11:43

Choosing servlet handlers based on QueryParam is not a good aproach, and by default no library gives you oportunity to do so. The closest that comes to mind is PathParam, that is something like Path("\api\{param1}\{param2}") but it's not what you are looking for.

To achieve want your want just

unregister those methods as servlet handlers (Optional, if you don't need them outside of queryparam selection scope)
define a new one that will choose based on query param

@GET @Produces(MediaType.APPLICATION_JSON)

public Response methodThree(QueryParam('type') String type) {
return type.equals("type1") ? this.methodOne() : this.methodTwo();   
}

this was option I thought so, I think this is only option :( — To Kra, Apr 08 '15 at 11:47

score 0 · Answer 2 · answered Apr 08 '15 at 11:47

You cannot have two methods with identical parameters for the same path. It's not pretty, but it will work..

@GET
@Produces(MediaType.APPLICATION_JSON)
public Response myMethod(@QueryParam("type") String type){

 if(type.equals("one"))
     return methodOne();
 else
     return methodTwo();
}

JAVA EE Rest conditional GET methods on QueryParams

2 Answers2