On Oct 5, 2009, at 10:42 AM, Steffen Niermann wrote:
Has anybody an idea, why the changes in the facts, which will be
printed in the console, will not take effect on the getSlotValue
fuction?
....
I'm not quite sure why you think the changes *would* be visible
through the variable "v" in your Java code. Your rules *don't* modify
the Verzug fact -- they retract it (i.e., delete it) after asserting a
completely separate one. The changes aren't reflected in the fact
pointed to by "v" because that fact isn't even in working memory.
(defrule einspannen
;(declare (no-loop TRUE))
(Werkstueck (Einspannungsart "Segmentbackenabdruck"))
?r1 <- (noloops (einspannennl 0))
?r2 <- (Verzug (v1 ?v1) (v2 ?v2))
=>
(retract ?r1)
(assert (noloops (einspannennl 2)))
(assert (Verzug (v1 (+ ?v1 2)) (v2 ?v2)))
(retract ?r2)
)
If you were to actually modify the existing fact, e.g.,
=>
(assert (noloops (einspannennl 2)))
(modify ?r1 (v1 (+ ?v1 2)) (v2 ?v2))
then of course you'd see the changes in that variable.
---------------------------------------------------------
Ernest Friedman-Hill
Informatics & Decision Sciences Phone: (925) 294-2154
Sandia National Labs
PO Box 969, MS 9012 [email protected]
Livermore, CA 94550 http://www.jessrules.com
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