Composer to send json to REST service

[moraleslos]

I have a very complex object that I would like sent using REST.  Most likely it would be sent as JSON.  However I'm not sure how this can be defined in the composite service that is REST-bounded.

I would like to do something like below but not sure how to code it:

// REST Service-- want the passed in "app" to be json

@POST

@Path("/submitApp")

@Produces({"application/json"})

List<AppDetails> submitApplication(@FormParam("app") Application app);

// Composer (want to send as JSON)

target.setParameters(new Object[]{((Application)app).getJsonString()});