[rules-users] setGlobal issue in StatefulSession

[Greg Barton]

Setting a global that is a subclass of the global reference works fine.  See attached code.

--- On Mon, 5/4/09, Mere Huzoor <tellkb at gmail.com> wrote:

> From: Mere Huzoor <tellkb at gmail.com>
> Subject: Re: [rules-users] setGlobal issue in StatefulSession
> To: greg_barton at yahoo.com, "Rules Users List" <rules-users at lists.jboss.org>
> Date: Monday, May 4, 2009, 1:39 PM
> 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
> >
> >
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >


      
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