[rules-users] Loop Drools on Multi Element

[Wolfgang Laun]

As an alternative to the CE forall, consider

rule setPriority
when
    $order: OrderType( priority != "high" )
    not OrderLineType( quantity <= 2 ) from $order.lineItem
then
    modify( $order ){ setPriority( "high" ) }
end

-W

On 21/02/2012, FrankVhh <frank.vanhoenshoven at agserv.eu> wrote:
> Hi,
>
> See forall element in Drools manual:
> 5.8.3.6.1. Conditional Element forall
>
> It does exactly what you describe. For the record, you may want to insert
> all your line items separately to working memory.
>
> Kind regards,
> Frank
>
>
> aliosha79 wrote
>>
>> Hi,
>> i'm Alessio and i'm new in this forum. I'm learning to use drool in this
>> period and i'm facing a problem.
>> Briefly:
>> 1- i have an xml document with a repeated element i.e.:
>> <order>
>>   <orderLine>
>>         <lineItem>
>>               <name>item1</name>
>>               <quantity>35</quantity>
>>         </lineItem>
>>   <orderline>
>>   <orderLine>
>>         <lineItem>
>>               <name>item2</name>
>>               <quantity>65</quantity>
>>         </lineItem>
>>   <orderline>
>>   <orderLine>
>>         <lineItem>
>>               <name>item3</name>
>>               <quantity>52</quantity>
>>         </lineItem>
>>   <orderline>
>>   <priority>Normal</priority>
>> </order>
>>
>> 2- i marshalled it in a java class named "OrderType" using jaxb library
>> 3- then i want to apply a rule stating: /IF EVERY LINEITEM QUANTITY IS
>> GREATER THAN 2
>>                                                 THEN SET PRIORITY TO HIGH/
>>
>> i can access every single order line Element using this rule:
>>
>> when
>>    $Order : OrderType($Order.OrderLine[0].LineItem.Quantity.Value > 2)
>> then
>>    $Order.getUBLRuleEnginePriority().setValue("High");
>>
>> $Order.addApplyedRule("hpRule");
>> end
>>
>> But how can i cycle on each of them writing the rule at point 3?
>> Thanks a lot.
>> Aliosha
>>
>
>
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