Calling "modify" to replace the contents of a slot with the same
object won't actually do anything; the rules won't be reevaluated
because as far as Jess is concerned, the contents of the slot did not
change. You'll have to make the ?security object into a first-class
object, and modify its properties using modify; then Jess will know
about the change and the rules will be re-evaluated as appropriate.
On Jan 23, 2009, at 5:49 AM, [email protected] wrote:
Hello,
I have condition on LHS rule like below:
(deffunction checkProdEmpty (?security)
(if (and (neq (get ?security prod) nil)(neq (get ?security prod)
"")(neq (get ?security prod) "0")) then
(return FALSE)
else
(return TRUE))
)
(defrule RuleFromFacts
(declare (salience ?*CONTENT_SPECIFIC_RULE*) (no-loop TRUE))
?trade <- (TR (instrmt ?security &:(eq (checkProdEmpty ?
security) TRUE)))
(or (SecurityDetails (isin ?isin &:(eq (get ?security ID) ?
isin)) (cusip ?cusip) (bbid ?bbid)(prodType ?prodTyp))
(SecurityDetails (isin ?isin) (cusip ?cusip &:(eq (get ?
security ID) ?cusip)) (bbid ?bbid)(prodType ?prodTyp))
(SecurityDetails (isin ?isin) (cusip ?cusip) (bbid ?bbid &:
(eq (get ?security ID) ?bbid))(prodType ?prodTyp)))
=>
(set ?security prod ?prodTyp)
(modify ?trade (instrmt ?security))
(log-info " Set Prod from Facts - SecurityID: " (get ?security
ID) " Prod: " ?prodTyp)
)
There is 1 SecurtiDetails fact present with cusip same as bbid and
hence the rule is activated twice.
But when the first time rule fires it sets the property prod to
something not null.
It should ideally not fire for second activation.
But it still fires.
Any idea ?
Thanks and regards,
Nikita
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