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

Hi, Thank you very much for all replies. I've tried also with not ( EPackage(...)), but the result is the same. I think that I remove the EClass from the facts in my solution, but they continue in my workingMemory. How I can see the facts of the workingMemory object (and how remove it)? Thanks Best regards Antonio 2010/5/5 <fgadrat(a)genigraph.fr&gt; > Hi Antonio, > Documentation states that the complement to "not" is "exists", whereas > "not" keyword is used to match the absence of a fact (in Working Memory), > and "exists" keyword is used to test the existence of one or more facts (in > Working memory). > > So if you want to test that a fact is not in working memory, then you > should use the > not(MyClass()) pattern. > > Hope this helps, > Francois. > > Antonio Neto <antoniosouzaneto(a)gmail.com&gt; a écrit : > > > > 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 > >> > >> > >> > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users