[rules-users] Counting Number of Items in NESTED LIST

[aliosha79]

I have this use case: an Order can contain one or more items... each item is
characterized by one or more measures. They are described by this simple
pojo class.

public class Order{ 

     protected List<Item> itemList;      
      
     public void   setItemList (List<Item> itemList) { ... } 
     public List<Item> getItemList() { ... }     
} 



public class Item {       
            
     protected List<Measure> measureList; 
      
     public void   setMeasureList (List<Measure> measureList) { ... }
     public List<Measure> getMeasureList() { ... }
} 


public class Measure { 
      
     protected int measure;             
      
     public    getMeasure() { ... }
     public    setMeasure() { ... } 
} 


Supposing i have in my Working Memory an Order containing 2 items. The first
item contains 5 measures, the second one instead contains 12 Measures.
I'd like to write a rule using MVEL (for the assumptions), specifying 

WHEN each ITEM has more than 11 measures THEN system.out.println ("order is
valid");

How can i write the assumption? It's important to use MVEL ... (is it
necessary to use accumulate? from? or what?)
Really thanks.



--
View this message in context: http://drools.46999.n3.nabble.com/Counting-Number-of-Items-in-NESTED-LIST-tp4018794.html
Sent from the Drools: User forum mailing list archive at Nabble.com.