Re: [rules-users] Using functions to derive values in "accumulate" (LHS)
2011/7/21 Christian Heupel <christian.heupel(a)fluidops.com>
----------------- ****
rule "Total Costs" ****
when ****
$person : Person( eval ($person.maxMoney != null ) )
Although not relevant to your problem: stick with the JavaBean convention:
There should be private Integer maxMoney; Integer getMaxMoney(); etc. and
then you write
Person( maxMoney != null )
****
** **
$totalCost : Number() ****
from accumulate( $trip : Trip( $cost : $trip.getCost()
) from $person.getTrips(), ****
sum( $cost ) ****
)
Again: Trip should have private Integer cost; Integer getCost() etc. and
then you
do
Trip( $cost: cost ) ...
To call an arbitrary method you should be able to do
sum( $trip.getCost() )
All together:
$person: Person( $maxMoney: maxMoney != null, $trips: trips != null )
Number( $spent: intValue > $maxMoney )
from accumulate( Trip( $cost: cost ) from $trips, sum( $cost ) )
-W
****
then ****
// take action ****
end ****
------------------- ****
** **
I have tried it with and without the $trip-variable (since I thought I
might have to use it to call its function). ****
** **
The error I get looks like this: ****
** **
Error INTERNAL_ERROR: Error: unknown:70:54 Unexpected token ')' ****
java.lang.Exception: Error: unknown:70:54 Unexpected token ')' ****
at
com.fluidops.coremgmt.ruleengine.PolicyTask.readRule(PolicyTask.java:489)
****
at
com.fluidops.coremgmt.ruleengine.PolicyTask.readRule(PolicyTask.java:419)
****
** **
I would be very thankful if one of you could help me out here :) ****
** **
Best regards, ****
Christian****
** **
** **
PS: I already had this question in the drools forum, it was, however not
forwarded to this mailing list, so please forgive me if it is a double post.
****
** **
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
Attachments:
- attachment.html (text/html — 4.1 KB)