[rules-users] Guvnor and collections.

[Jane James]

Hi, All,
     I have a similar questions to Jame's question. 
     I have a list of Strings which is wrapped in a class called Names, and what I want to get is to find all the elements that's equal to "targetStringname". 
     How do I create a rule using guided rule editor in Guvnor to create a rule which looks like the following? (Our system requires  users to be able to create their own rules and I doubt that the users will know how to write rules like the following).

when
   $name: Names( )
   $foundThese: ArrayList (size >0) from collect (String (this matches "targetname" ) from $name.names)

then
   System.out.println("something happened here");

public class Names {
      private List <String> name = new ArrayList<String>();
}

Thanks a bunch!



________________________________
From: "Nord, James" <JNord at nds.com>
To: rules-users at lists.jboss.org
Sent: Tue, October 6, 2009 8:48:46 AM
Subject: [rules-users] Guvnor test scenarios and collections.


Hi 
all,
 
One of our facts has 
a collection which the rules add to.
 
I'm trying to write 
a test scenrio to cover the simple case where the fact with an empty collection 
runs through and ends up containing a value "default".
 
However I can't work 
out how to get Guvnor to do this.  I am presented with fact.blah and then 
"equals" or "does not equal" but no contains or does not 
contain.
I have tried the 
MVEL syntax of [default] but this complains that the expectation fails as: 
"[myFact] field [myCollection] was 
[[DEFAULT]] expected [[DEFAULT]]."
 
Is there any any way to do 
this?
 
Regards,
 
    
/James
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