Hello-
The problem is you are substituting your non-bean class for an example
requiring bean interfaces. Specifically, the definstance routine attempts
to register property change support listeners on the instance of your
class, but your class doesn't implement or encapsulate the
PropertyChangeSupport interface. Read up on 'definstance', 'defclass',
and, more generally, java beans for a more thorough explanation.
Also, I would recommend that you introduce yourself to Jess through the
"pure" scripting shell features before moving on to more advanced
integration with Java. At some point, a thorough read through all the
Jess documentation can yield an invaluable resource, particularly for
integrating Jess with Java. There are many subtle gotchas that aren't
immediately apparent from the limited set of available examples, but are
explained in pieces throughout the docs.
-Dave Barnett
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