Re: [rules-users] Handling maps in Drools
Thanks a lot W. That worked like a charm. Just one more twist to the same issue .
Along with the total score for the certifications i also want to take a count of those
certifications where the user scores are greater than the required scores for those
certifications.
I believe i won't be able to use count and sum in the same function as didn't work
for me. However was having issues with figuring out how to do that.
I was thinking along the below lines but it obviously didn't work out
rule "Count test"
when
$rb : Certifications($reqCertificationKeys : requiredCertifications.keySet,
$reqCertifications : requiredCertifications)
$user : User( $userCertifications : userCertifications )
Number( $i : intValue ) from accumulate( $key: String( this
memberOf ($userCertifications.keySet()) ) from $reqCertificationKeys,
count( ($userCertifications.get( $key ) > || ==
$reqCertifications.get($key) ) ? 1 : 0) )
then
System.out.println( "COUNT is " + $i );
end
wonder if there's a better way out.
regards,
Manav
----- Original Message -----
From: Wolfgang Laun <wolfgang.laun(a)gmail.com>
To: Manav <manav7574(a)yahoo.com>; Rules Users List
<rules-users(a)lists.jboss.org>
Cc:
Sent: Thursday, August 16, 2012 2:45 PM
Subject: Re: [rules-users] Handling maps in Drools
This rule works with 5.1.1:
rule "Map test"
when
$rb : Certifications($reqCertificationKeys : requiredCertifications.keySet)
$user : User( $userCertifications : userCertifications )
Number( $score : intValue ) from accumulate( $key: String( this
memberOf ($userCertifications.keySet()) ) from $reqCertificationKeys,
sum( $userCertifications.get( $key ) ) )
then
System.out.println( "score is " + $score );
end
-W
On 16/08/2012, Manav <manav7574(a)yahoo.com> wrote:
Hi,
I am facing an issue with handling maps in LHS of drools. Appreciate your
help with the same.
I am using Drools version 5.1.
I have two maps where one is a reference map that contains certifications
(key) and scores(value) required and other is map of user's actual
certifications and scores. Objective is to find the certifications from
users map based on keys in the reference map . Then for these certifications
sum the score values and check if they cross the threshold.
While trying to do the first step i am facing an issue . My rule looks like
this :-
rule "Map test"
when
$rb : Certifications($reqCertificationKeys :
requiredCertifications.keySet)
$user : User($userCertifications : userCertifications)
$arg : String() from $reqCertificationKeys
HashMap ($value : this[$arg] != null) from $userCertifications // Does
not work
then
System.out.println ("Hash Map" + $arg);
end
However if i change the above line that has issues with below
HashMap ($value : this["Java"] != null) from $userCertifications //
Works
Is there a way to replace the key with a variable than with a fixed value ?
Is it possible to iterate the second map with the key values that we get
from the reference map ?
Regards,
Manav
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