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

[Vincent Legendre]

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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