[Jython-users] using jython subclasses of java classes in java code HOWTO?

[Ted B. <te...@et...>]

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I am developing an application which stores data in XML format and allows 
users to maniuplate that data via a JTree control.  There are a number of 
node-types that users can create and store in the tree.  So far, all of them 
have been implemented in java.

All of these nodes are subclasses of BaseNodehandler, and I would like to 
provide for users creating subclasses of BaseNodehandler with jython and then 
storing them in the tree ( and manipulating them ).

I have tried subclassing like this:

class foo( BaseNodehandler ):
  def __init__( self, element ):
    "@sig public foo( org.jdom.Element elem )"
    BaseNodehandler.__init__( self, element )

and 'pulling' it into the java code like this:

Object tmp = interp.get( "instance_of_foo" ).__tojava__( 
BaseNodehandler.class );
BaseNodehandler bnh = (BaseNodehandler)tmp;

But tmp is an instance of PySingleton, and so does not cast correctly to bnh.

My question:  Is there a HOWTO somewhere detailing how to do this?  I have 
frittered days away trying to figure out what I'm doing, and haven't made 
much progress.

ted
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