[rules-users] looping over list

[Bruno Freudensprung]

Hi,

Maybe can you try the "collect" keyword? According to what I see in the 
documentation (4.8.3.9. Conditional Element collect) it seems to fit 
your needs.
I'll probably give this a try:

rule "Select Officer"
    ruleflow-group "select_officer"
    no-loop true
    salience 20
    when
       $processInstance: WorkflowProcessInstance()
       $requestData: RequestData($genre : genre, $cost : cost)
       $sublist : ArrayList()
              from collect( Officer( minimumCost <=  $cost, $cost <= 
maximumCost ) from $genre)
    then
       System.out.println("Hey!");
       List shrunkOfficersWithGenre = $sublist;      
end

Best regards,

Bruno (newbie).


odelyaholiday a écrit :
> I have a list of officers:
> public static final Map<String, List<Officer>> officersPerGenre = new
> HashMap<String, List<Officer>>();
>
> Where the Officer with:
>
> String name;
> Integer mininumCost;
> Integer maximumCost;
>
> in officersPerGenre I fill for each genre list of officers.
>
> In my drools:
>
> rule "Select Officer"
>     ruleflow-group "select_officer"
>     no-loop true
>     salience 20
>     when
>        $processInstance: WorkflowProcessInstance()
>        $requestData: RequestData();
>     then
>        System.out.println("Hey!");
>        List officersWithGenre = (List)officers.get($requestData.getGenre());       
> end
>
> Now I need to shrink the officersWithGenre only to officers that
> $requestData.cost is between their mininumCost and maximum cost.
>
> How do I write it in drools? In java i will simply iterate over the
> collection.
>
>
>