Yes, I understand the VERY nice feature of 'shadowing' Java Beans as
deftemplates (unordered facts) and then pattern-matching on the facts.
However, how do you match on a generalized fact/Java Bean? For
example, suppose I have a Java Bean named Animal for which I specify
'(defclass animal Animal)'. I then have other Java Beans which
inherit from Animal (e.g. Dog, Cat) for which I provide similar
defclass statements. Then if I provide definstances for Animal, Dog
and Cat Java Bean objects, how do I pattern-match on any kind of
Animal? A pattern such as "(animal ... (OBJECT ?obj))" won't work
since it only matches instances of the base class Animal.
I realize I'm probably missing something obvious, but I could sure use
a point in the right direction!
Thanks again,
Alan Davis
CAD Research Center
California Polytechnic State University
San Luis Obispo, CA 93407
On Tue, 18 Aug 1998, Ernest Friedman-Hill wrote:
> Hi Alan,
>
> Instead of supporting COOL, Jess supports pattern-matching on Java
> Beans. You therefore have the entire Java language at your disposal,
> including inheritance. Instead of creating COOL classes and instances
> you create Java classes and objects.
>
> I think alan davis wrote:
> >
> > I just jumped on this user group, so forgive me if this question has
> > already been asked...
> >
> > I'm attempting to port COOL defrules to Jess and am looking for a way
> > to pattern match on objects in a COOL-like fashion. Specifically, I
> > need inheritance on the LHS (e.g. "(object (is-a <class>) ...)" ).
> > Since Jess does not directly support this (as does COOL), I was
> > hoping someone has already implemented a nice workaround.
> >
> > Thanks in advance!
> >
> > Alan Davis
> > CAD Research Center
> > California Polytechnic State University
> > San Luis Obispo, CA 93407
> >
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>
> ---------------------------------------------------------
> Ernest Friedman-Hill
> Distributed Systems Research Phone: (510) 294-2154
> Sandia National Labs FAX: (510) 294-2234
> Org. 8920, MS 9214 [EMAIL PROTECTED]
> PO Box 969 http://herzberg.ca.sandia.gov
> Livermore, CA 94550
>
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