Java interoperability solution using XML-RPC

I am working on a generic scripting/programming architecture for a Java 
application.
There is a set of classes that I want to expose via API so that it can 
be used to developed plugins for interpreted languages. The final aim 
is to expose the Java classes as COM interfaces via a COM server or as 
Python packages etc. To achieve this I would have to use a form of RPC 
that is statefull. By statefull what I mean is that if a method in a 
Java class returns other Java object (non primitive) then that object 
should be available as proxy at the client side and it should not be 
passed by value. So any method invoked on the proxy object would result 
in a call to the actual Java object.
Can someone comment on how I can achieve the above behavior? Which of 
these technologies could be used:
JNI, XML-RPC, SOAP, CORBA etc.

Can XML-RPC be used to achieve the above?
The idea is to develop a generic set of API so that plugins can be 
developed for any language on any platform. Any comments appreciated.








 
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