Struggling with class casting

[a1anw2]

I have what is a relatively simple/standard setup; a plugin design pattern.

I can create the plugin in the new JCL classloader and get a reference to it with no problems. I create the reference to the interface using:

myPlugin = JclUtils.cast(...)

Now any method that I pass in standard JDK objects; no problems whatsoever. Everything is happy. However the problem is when i am attempting to get at a function that is passing a custom interface to it.

So my main callable interface is:

public IJobResult handle( IJobMessage job )

I create an instance of IJobMessage in the main code and when i attempt to call myPlugin.handle() it keeps

com.sun.proxy.$Proxy0 threw unexpected java.lang.reflect.UndeclaredThrowableException

with no such method. I have tried to JclUtils.cast() on the object that implements IJobMessage but that doesn't work either.

So the question is, how do I create an object in the base code and pass that to my loaded plugin loaded by JCL?

Thank you for assistance you can lend