[rules-users] Is nested loops possible ?

Hi, I am having a problem in iterating a list inside a list. I am having the following business scenario. Public Class CustomerOrder { private String customerName; private ArrayList<Order> orderList; } Public Class Order { private String orderId; private String orderTime; private ArrayList<OrderItem> orderList; } Public Class OrderItem { private String itemName; private Double itemAmount; } I need to find the total order amount for each order and the sum of all order. My rule is like individual orders should not exceed a 10000 and total order amount of all customers should not exceed 100000. For this, I need to iterate ArrayList<Order> orderList and during each iteration , I need to iterate ArrayList<OrderItem> orderList. Is this possible in Drools ? I tried something like this. But it doesn't seem to be working. when ClaimRegistration($orderList: orderList) Number( $count : intValue > 0) from accumulate(Order(orderId== "order1" && Number( doubleValue > 10000 ) from accumulate( OrderItem( $value : itemAmount), init( double total = 0; ), action( total += $value; ), reverse( total -= $value; ), result( total ) ) ) from $orderList,count(1)) then Sysout(",,,,,"); It would be of great help if any one can give suggestions to solve this. Is nested loops possible in Drools ? Regards, Dinesh -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Is-nested-loops-possi... Sent from the Drools - User mailing list archive at Nabble.com.