[rules-users] ArrayIndexOutOfBounds exception when predicate parameter is varArgs

[Martin A]

Hi, Vincent,

No, it's actually a List<String> events that is a property of that
GameStateController, not Event objects.
Ok I will workaround it, but I guess it may be a bug, because I think that
varArgs feature was not supported in 5.2.1, and is something new...

Best regards,
Martin

2012/1/17 Vincent Legendre <vincent.legendre at eurodecision.com>

>  May be drool cannot support variable length arguments in methods. But,
> seeing your rules, I think you should change the way you match your events
> objects by exploiting drools syntax and RETE instead of calling predicates.
>
> If I understand well, you are creating a game, and this rule should
> trigger when the player achives some goals to pass him to next level.
> So I guess that your GameStateController contains a set of Event objects ?
> If yes, I recommend inserting directly the event in the session, and write
> a rule like this :
>
>  rule "quest_reach_level_1_in_any_category_accomplished"
>     when
>         Event(id == "eventId")
>         *not *Event(id == "otherEventId")
>         *exists *Event(id == "param1" || "param2" || "param3" .... etc
> etc)
>         $gsc : GameStateController()   // if you still need it, consider
> adding it as a global
>          $response : Response()             // if you can, set it as
> global
>      then
>         ... some business logic
> end
>
> Note that it is solving the problem of varaible length argument, using the
> fact that you can add easily new terms to a boolean expression.
>
> Le 17/01/2012 19:23, Martin A a écrit :
>
> Hello, guys,
>
>  I've got a rule which states:
>
>  rule "quest_reach_level_1_in_any_category_accomplished"
>     when
>         $gsc : GameStateController(hasEventOccurred("eventId") &&
> !hasEventOccurred("otherEventId") && hasAnyEventOccurred("param1",
> "param2", "param3", "param4", "param5", "param6", "param7", "param8",
> "param9", "param10", "param11", "param12"))
>         $response : Response()
>     then
>         ... some business logic
> end
>
>  which ends up with:
>
>  Caused by: org.drools.RuntimeDroolsException: Exception executing
> predicate hasA
> nyEventOccurred("level1_love", "level1_friendship", "level1_prosperity",
> "level1
> _charisma", "level1_willpower", "level1_wisdom", "level1_entertainment",
> "level1
> _adventure", "level1_inspiration", "level1_harmony",
> "level1_lightheartedness",
> "level1_confidence")
>         at
> org.drools.rule.PredicateConstraint.isAllowed(PredicateConstraint.java:298)
>
>
> I'm using Drools 5.3.0.Final and it fails when it comes to evaluating the
> predicate hasAnyEventOccurred(String... varArgs).
>
>  Thanks,
> Martin
>
>
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