Dynamic Programming Environments

[Syver Enstad]

don't know if this helps you, but you could check out the type object
pattern:

from the PLOP 3 book:
Intent:
A Type Object decouples instances from their classes so that those
classes can be implemented as instances of a class. Type Object allows
new classes to be created dynamically at runtime, lets a system proved
its own type-checking rules, and can lead to simpler and smaller
systems.

Do a google search on, type object pattern if you don't have the book
within reach.
-- 

Vennlig hilsen 

Syver Enstad