JESS: Interfaces and classes with shadow facts

[Joao Carlos Mourao]

Hello,

I'm having some problems to use interfaces in Jess. I had make a search 
in the mailing list, and although there were some messages over the 
topic, i still was not able to really understand how the process works.
The problem is basic: I have a set of classes C, and a respective set of 
interfaces I. I'm creating objects of classes C and adding to the 
working memory. I would like use the interfaces I to access this objects 
(in Jess). How?

Solutions:
   a) should i declare the classes, and work with the classes, leaving 
the interfaces behind;
   b) declare the interfaces as (deftemplate I_name (declare 
(from-class C_name)); Doesn't work, because when i try to match in a 
rule, I_name is not the same as C_name, then Jess don't match
   c) have a combination of declarations of interfaces and classes, 
like Russ did in a previous message
               "r.eval("(defclass IInterface1 IInterface1)");
                r.eval("(defclass IInterface2 IInterface2 extends 
IInterface1)");
               r.eval("(defclass AbstractClassA AbstractClassA extends 
IInterface2)");
               r.eval("(defclass ClassB ClassB extends AbstractClassA)");
               r.eval("(defclass ClassC ClassC extends AbstractClassA)");
               r.eval("(defclass ClassD ClassD extends IInterface2)");" 
, which i have tried but haven't worked.

Any ideas?


Joao

-unclassified


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