fields of inherited classes

[Sandeep Puri]

Hi all,
Quite new to clojure. Maybe I'm doing something wrong here. I was
trying to run a simple test of the jmonkey game libraries.

This is the simple java source:

public class HelloWorld extends SimpleGame{
public static void main(String[] args) {
HelloWorld app = new HelloWorld(); // Create Object
// Signal to show properties dialog
app.setDialogBehaviour(SimpleGame.ALWAYS_SHOW_PROPS_DIALOG);
app.start(); // Start the program
}
protected void simpleInitGame() {
// Make a box
Box b = new Box("Mybox", new Vector3f(0,0,0), new Vector3f(1,1,1));
rootNode.attachChild(b); // Put it in the scene graph
}
}

In clojure I have,

(def app (doto (proxy [SimpleGame] []
(simpleInitGame []
(let [rt (. this rootNode)]
(. rt (attachChild
(new Box
"mybox"
(new Vector3f 0 0 0)
(new Vector3f 1 1
1)))))))
(setDialogBehaviour 2)))
(. app (start))

I get java.lang.IllegalArgumentException: No matching field found:
rootNode
at clojure.lang.Reflector.getInstanceField(Reflector.java:189)

rootNode should be inherited from SimpleGame (which actually inherits
from another class BaseSimpleGame.

Any help in pointing me in the right direction would be appreciated.

[Christophe Grand]

Don't know how to work around but the missing information is that
rootNode is protected.

[Rich Hickey]

As it says in the docs for proxy, you can't access protected members
from a proxy.

You best bet is to create a stub class in Java that derives from
SimpleGame and exposes any protected members you want to access via
public methods. Then in Clojure proxy that stub.

Rich

[Sandeep Puri]

Thanks. I must've missed the part about protected members.
More reading.
This is great. Quick and awesome feedback.
-Sandeep