Re: [rules-users] how "exists" works exactly?

Any idea? Please... 2010/5/4 Antonio Neto <antoniosouzaneto(a)gmail.com&gt; > Hi all, > > I don't know exactly why I have a problem in my "exists" function. I've > tried many different ways, but it does not work. Anybody could help me, > please? > > > I have the following rules: > > *rule "diff" > when > $var1: EReference(name == "employee") > $var2: EClass(name == "Company", EAllReferences contains $var1) > not (exists( EPackage(EClassifiers contains $var2 ) )) > then > insertLogical(new IntConstraintOccurrence("diff", 10)); > end > > rule "ClassesNotReferenced" > when > $q1 : EClass(); > $q2 : EPackage(EClassifiers contains $q1); > not( exists ( EReference(EType == $q1) )); > then > insertLogical(new IntConstraintOccurrence("ClassesNotReferenced", > 1, $q1)); > end* > > > and in my facts (and my EPackage) I have 4 instances of EClass "Company" > with a EReference "employee", and another EClass "Person". I still have a > "move" that removes EClasses in my Drools Solver. > > I need to have only one classe "Company" after processing. But it removes > only the EClass "Person", when it was supposed to remove one EClass "Person" > and 3 ECLasses "Company". Leaving one EClass "Company" in the end. > > The problem is: when Drools tries to remove a EClass "Person" it thinks > that the EClass "Company" does not exists. But in fact there are 3 others. > > Any clue about it, please ? > > Thanks > > Bests regards > > Antonio > > >