I think Mehta, Chirag (IT) wrote:
>
> I cannot seem to figure out what is wrong!
The things on the left-hand-side of a rule are always conditional
elements (patterns or groups of patterns), not function calls. Jess is
trying to interpret "(bind ?noncomp (/ ?mv ?io))" as a pattern that
matches "bind" facts, and it's complaining because (/ ?mv ?io) isn't a
valid slot value constraint.
There's no way to bind a variable on the LHS of a rule and see it on
the RHS of a rule other than by directly matching it. You're going to
have to compute (/ ?mv ?io) twice, once in the "test" CE and once on
the RHS of the rule.
I think, by the way, that you've done something else wrong here. Each
of the three bondMVMax patterns above can match a difference bondMVMax
fact. Since each one matches a different slot, I'm guessing you
actually mean for all the patterns to apply to the *same* fact; you're
not trying to find sets of three facts, but single facts that pass all
these criteria. You need to write all the criteria as one pattern:
(defrule calcifnc
(bondMVMax (cusip ?c)
(mv ?mv)
(issue_outstanding ?io&~nil))
(test (> (/ ?mv ?io) 10))
=>
(printout t ?c " is Non Complaint nc = " (/ ?mv ?io) crlf))
>
> Also, I wish to save all the facts that meet the tests to a data
> structure and then return the data to my java program. What is the best
> method to do this??
You can have the rule store a reference to the fact each time it
fires; for example , in your Java code
Rete engine = ...
ArrayList result = new ArrayList();
engine.store("RESULT", result);
Then make the rule look like
(defrule calcifnc
?b <- (bondMVMax (cusip ?c)
(mv ?mv)
(issue_outstanding ?io&~nil))
(test (> (/ ?mv ?io) 10))
=>
(printout t ?c " is Non Complaint nc = " (/ ?mv ?io) crlf)
((fetch RESULT) add ?b))
After running the engine, the ArrayList "result" will contain
references to all the jess.Fact objects that match the criteria.
---------------------------------------------------------
Ernest Friedman-Hill
Advanced Software Research Phone: (925) 294-2154
Sandia National Labs FAX: (925) 294-2234
PO Box 969, MS 9012 [EMAIL PROTECTED]
Livermore, CA 94550 http://herzberg.ca.sandia.gov
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