[rules-users] RE : Identity Mode?

[Bruno FREUDENSPRUNG]

Hi, 

I think you are talking about the assert behavior:

KnowledgeBaseConfiguration configuration = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
configuration.setOption(AssertBehaviorOption.EQUALITY);

But I think you will have to add a condition like... :

p1 : Person()
Person(this != p1)

... to make it work like you intended.

Regards,

Bruno.

________________________________________
De : rules-users-bounces at lists.jboss.org [rules-users-bounces at lists.jboss.org] de la part de rjr201 [rich.j.riley at gmail.com]
Date d'envoi : jeudi 20 juin 2013 16:05
À : rules-users at lists.jboss.org
Objet : [rules-users] Identity Mode?

If I have a rule such as:

When
   Person()
   Person()
Then
   System.out.println("There are two people!")
End

I only want this to fire if there are two (or more) Person objects inserted
into the session, however as default drools will fire even when there is
just one Person object inserted (i.e. both Person patterns get matched to
the same fact).

I seem to remember there is a flag I can set that swaps between these two
types of behavior, and seem to remember it's to do with Identity/Equality
mode. However, I can't remember how or where to do this.

Any help on this would be greatly appreciated..

Cheers,
Rich.

P.S I realise that I could add constraints to the patterns to explicitly
check that the facts aren't the same.. however I'd rather not have to do
that as I'm trying to make it as simple as possible for users to create
rules..



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