[JBoss JIRA] (DROOLS-173) Collect and accumulate conditions not working togheter

Wednesday, 19 June 2013

Alvaro Pantoja created DROOLS-173:
-------------------------------------

             Summary: Collect and accumulate conditions not working togheter
                 Key: DROOLS-173
                 URL: https://issues.jboss.org/browse/DROOLS-173
             Project: Drools
          Issue Type: Bug
      Security Level: Public (Everyone can see)
    Affects Versions: 6.0.0.Beta3
            Reporter: Alvaro Pantoja
            Assignee: Mark Proctor

Running this example:

...
 import java.util.ArrayList

 declare Item
     code: int
     price: int
     present: boolean
 end

 rule "Init"
 when
 then
     insert(new Item(1,40,false));
     insert(new Item(2,40,false));
     insert(new Item(3,40,false));
     insert(new Item(4,40,false));
 end

 rule "CollectAndAccumulateRule"
 when
     //At least two items that aren't presents
     objList: ArrayList(size>=2) from collect( Item(present==false))
     //Total price bigger than 100
     price: Number(intValue>=100) from accumulate( Item($w:price, present==false),
sum($w))
 then

     System.out.println("Sum: "+price);
     System.out.println("Items size: "+objList.size());

     //Look for the minor price item
     Item min = null;
     for(Object obj: objList){
         if (min!=null){
             min = (min.getPrice()>((Item)obj).getPrice())?(Item)obj:min;
         }
         else {
             min = (Item)obj;
         }
     }

     //And make it a present
     if (min!=null){
         modify(min){setPresent(true)};
     }
 end 
Leads to an extra activacion and execution of rule "CollectAndAccumulateRule".
It doesn't matter wich order conditions have, as long as there ara an
"accumulate" and a "collect".

Expected output would be:

    Sum: 160.0
    Items size: 4
    Sum: 120.0
    Items size: 3

But is:

    Sum: 160.0
    Items size: 4
    Sum: 120.0
    Items size: 4
    Sum: 120.0
    Items size: 3

Find attached agenda and working memory log snapshot

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