[rules-users] drools queries: strange dependency

[Davide Sottara]

Hi,
two questions : i) which version of Drools are you using, ii) did you
check whether the packageBuilder.getErrors()
returns any error message?
I've tried to reproduce the issue on 5.5.1-SNAPSHOT, and it seems to
work fine.
This is the unit test case I have written:

http://pastebin.com/NXh97u4W

Consider that many bugs were fixed in 5.5.1 and a maintenance release
5.6 will be released in a few days
Davide






On 04/10/2013 08:33 PM, upalik wrote:
>
> This message was cross-posted to stack-exchange. If someone wants to
> answer there, the URL is
> http://stackoverflow.com/questions/15922343/drools-queries-strange-dependency
> .
>
> I'm somewhat new to Drools, and experienced this strange behavior
> during writing a query.
>
> To start with, the Hotel class here is a subclass of PlaceImpl, which
> implements the interface Place. PlaceImpl itself is a subclass (via
> another class) of OntologyClassImpl, where the method getClasses() is
> implemented in the most trivial way: it returns an already existing
> java.util.Set of objects. In short, getClasses() is accessible from
> both Place interface and Hotel class.
>
> My problem is this: The following query does not return any result
> even when there are matching Hotels.
>
> query "qryRomantic" 
>     $e:   Hotel (classes contains Semantics.AMB_Romantic)
> end
> However, if I replace Hotel with Place, then the /query returns
> desired results/, although the ONLY condition-setting rules are
> written for Hotel, as follows. (This rule actually gets fired several
> times.)
> rule "Set semantic class Romantic"
> no-loop
>     when
>         $hotel: Hotel( ... conditions go here ... )
>     then
>         modify ($hotel){
>             addToClasses(Semantics.AMB_Romantic)
>         }
> end
>
> It does not end there.
>
> if I add another query to the rule file, for exactly the opposite
> condition as follows,
>
> query "qryNonRomantic" 
>     $e:   Hotel (classes not contains Semantics.AMB_Romantic)
> end
>
> then the /first query/ starts to return the desired results, /EVEN
> WHEN the new query is not called at all/!
>
> What am I doing wrong? I'd be really grateful for any pointers.
>
> ------------------------------------------------------------------------
> View this message in context: drools queries: strange dependency
> <http://drools.46999.n3.nabble.com/drools-queries-strange-dependency-tp4023320.html>
> Sent from the Drools: User forum mailing list archive
> <http://drools.46999.n3.nabble.com/Drools-User-forum-f47000.html> at
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>
>
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