How do I convert a POJO to JSON in PlayN?

Question

I want to send a string with json content to a REST service. How can I convert a simple POJO to a json string? Normaly I would use Gson to do this:

My class that I want to convert:

public class UserMdl {
   String name;
   String pwHash;
   //Constructur, getter and setter....
}

And my code to do this:

UserMdl userMd = new UserMdl("name", "pwHash");
Gson gson = new Gson();
String json = gson.toJson(userMdl);

However I cannot get gson to work with PlayN in the HTML build. It only works in the Java build. And I cannot figure out how to do this with the PlayN.json() stuff.

Trophoblast

did you ever figure this out? i'm running into the same problem trying to deserialize Box2D shapes from JSON – Vernation

No, i think PlayN currently lacks many important features, due to the missing reflection capabilities of JavaScript. I started to implement a toJson method for every DTO on my client. At least on the server you can use something better. Look at this answer: https://mcmap.net/q/1328905/-collaboration-from-playn-client-with-server – Trophoblast

For communication between client and server I use the same PlayN.json() classes since I already had to write client side code to be able to read the json, especially giving how easy of a task it is. – Reimpression