[rules-users] setGlobal issue in StatefulSession

[Mere Huzoor]

Please ignore the syntax in this posting. Yes, it is suppose to be like
this:

public abstract class Base {

}

I would appreciate if you can explain how I can achieve the polymorphism
behavior in drools (explained in my example). FYI I'm using version 4.0.7.

Thanks!

On Mon, May 4, 2009 at 10:57 AM, Greg Barton <greg_barton at yahoo.com> wrote:

>
> Well, we can start out with the fact that this is improper java syntax:
>
> class abstract Base () {}
>
> The () is not in a class declaration.  Does this code compile for you? :)
>
> --- On Mon, 5/4/09, tellkb <tellkb at gmail.com> wrote:
>
> > From: tellkb <tellkb at gmail.com>
> > Subject: [rules-users] setGlobal issue in StatefulSession
> > To: rules-users at lists.jboss.org
> > Date: Monday, May 4, 2009, 12:35 PM
> > Hi there,
> >
> > I want to set setGlobal in working memory at run time based
> > on derived
> > class, e.g. DerivedOne or DerivedTwo. But it throws
> > following error:
> >
> >       Illegal class for global. Expected
> > [org.comp.app.bean.Base], found
> > [org.comp.app.bean.DerivedOne].
> >
> >
> > It should automatically resolve the derived class. Please
> > let me know if I'm
> > doing something wrong. I'd appreciate your help.
> >
> >
> > Thanks,
> > -KB
> >
> > Here are the classed I'm using in my test project:
> >
> >
> > class abstract Base () {
> >
> >       public void init( StatefulSession workingMemory ) {
> >               this.workingMemory = workingMemory;
> >               workingMemory.setGlobal("app", this);
> >       }
> >       public void logMe() {
> >               System.out.println("From Derived BASE...");
> >       }
> > }
> >
> > class DerivedOne() extends Base{
> >       public void runRules( Object obj) {
> >               ObjOne obj1 = (ObjOne)obj
> >               workingMemory.insert(obj1);
> >               workingMemory.fireAllRules();
> >               workingMemory.dispose();
> >       }
> >       public void logMe() {
> >               System.out.println("From Derived ONE...");
> >       }
> > }
> >
> > class DerivedTwo() extends Base{
> >       public void runRules( Object obj) {
> >               ObjTwo obj2 = (ObjTwo)obj
> >               workingMemory.insert(obj2);
> >               workingMemory.fireAllRules();
> >               workingMemory.dispose();
> >       }
> >       public void logMe() {
> >               System.out.println("From Derived ONE...");
> >       }
> > }
> >
> >
> > class Caller() {
> >
> >       RuleBase ruleBase = ruleBaseFactory.open(docRules);
> >       workingMemory = ruleBase.newStatefulSession();
> >
> >       if (sub==1) {
> >               der1 = new DerivedOne();
> >               der1.init(workingMemory);
> >               der1.runRules();
> >       }
> >       else if (sub==1) {
> >               der2 = new DerivedTwo();
> >               der2.init(workingMemory);
> >               der2.runRules();
> >       }
> > }
> >
> > //********DRL FILE*****
> > package com.sample
> >
> > import com.sample.app.RuleCaller.Message;
> >
> > global com.sample.app.Base app;
> >
> > rule "using a static function"
> > when
> >     eval( true )
> > then
> >     System.out.println( "Message from Rule." );
> >     app.logMe();
> > end
> > //********DRL FILE*****
> > --
> > View this message in context:
> >
> http://www.nabble.com/setGlobal-issue-in-StatefulSession-tp23373008p23373008.html
> > Sent from the drools - user mailing list archive at
> > Nabble.com.
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
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