Hello,

Solved it help from ferada in the IRC channel, it's trivial now that I look at it but I'll leave it here anyway, maybe it helps someone.

Frederico Munoz fsmunoz@sdf.org wrote:

I have one doubt regarding LispObject (what we get from Function.execute): I have read some introspection in the manual but my use-case is slightly different since the I will use the return value of the Lisp call and that value is actually a Java class (from a non-standard library which I use) that will be the return value of the main method of the Main class.

Assuming somethins like this in the Lisp file:

--- (defun say-hello (&optional name) (let ((response (java:jnew "com.google.gson.JsonObject"))) response)) --- ... this works from the Java side:

--- LispObject result = voidFunction.execute(new JavaObject(thisObject)); JavaObject jo = ((JavaObject) result); JsonObject json = ((JsonObject) jo.getObject()); json.addProperty("greet", "Hi!"); System.out.println(json.get("greet")); // => "Hi!" System.out.println("Class: " + json.getClass().getName()); // => Class: com.google.gson.JsonObject ---

Best regards,