[rules-dev] is this a bug? import function not supporting varargs?

[Michal Bali]

Hi Jane,

The varargs feature definitely works with 5.0.1. I haven't tried 5.1.0M.

You can download the working example from
http://code.google.com/p/droolsbook/
Download the parent-1.0-examples.zip<http://droolsbook.googlecode.com/files/parent-1.0-examples.zip>,
extract it and see project validation in
droolsBookParent/validation/src/main/resources/validation.drl. To test it
you can run the unit test in
droolsBookParent/validation/src/test/java/droolsbook/bank/service/impl/ValidationTest

You could also try to put the fuction inside the DRL itself as it is shown
in validation.drl (code that is commented out)

BTW the 'Rules Dev List' is not for these type of questions. It is meant for
core developers of the Drools platform.

Best regards,
Michal


On Wed, Nov 4, 2009 at 2:44 AM, Michael Neale <michael.neale at gmail.com>wrote:

> yes my point is the varargs thing probably will not work.
>
> On Wed, Nov 4, 2009 at 4:59 AM, Jane James <jane6210 at yahoo.com> wrote:
> >  public static void error (RuleContext kcontext, Object... context) {...}
> >
> > ===>Object... context
> >
> >
> >
> >
> >
> > ----- Original Message ----
> > From: Michael Neale <michael.neale at gmail.com>
> > To: Rules Dev List <rules-dev at lists.jboss.org>
> > Sent: Mon, November 2, 2009 11:56:09 PM
> > Subject: Re: [rules-dev] is this a bug? import function not supporting
> varargs?
> >
> > I think there are issues with java5 syntax isms - which varargs is?
> >
> > On Tue, Nov 3, 2009 at 2:17 PM, Jane James <jane6210 at yahoo.com> wrote:
> >> Hi guys,
> >>     I have a question regarding the import function feature in Drools
> >> 5.1.0M.
> >>
> >>     I am reading the Drools JBoss Rules 5.0 book Developer's guide by
> Michal
> >> Bali and tried one of the examples but somehow I couldn't get my rules
> work
> >> with the method that has varargs.
> >>
> >> Here's what I have (copied from page 123):
> >>
> >> public class ValidationHelper {
> >>     public static void error (RuleContext kcontext, Object... context) {
> >>         KnowledgeRuntime knowledgeRuntime =
> kcontext.getKnowledgeRuntime();
> >>         ValidationReport validationReport =
> >> (ValidationReport)knowledgeRuntime.getGlobal("validationReport");
> >>         ReportFactory reportFactory = (ReportFactory)
> >> knowledgeRuntime.getGlobal("reportFactory");
> >>
> >>         kcontext.insertLogical(reportFactory.createMessage(
> >>                 Message.Type.ERROR, kcontext.getRule().getName(),
> >>                 context));
> >>     }
> >> }
> >>
> >>
> >> then in my drools file (copied from page 42):
> >> i have
> >>
> >> import org.drools.runtime.rule.RuleContext;
> >> import function ValidationHelper.error;
> >> ...
> >> rule test
> >> when
> >>   #condition
> >> then
> >>     error(drools)
> >>
> >>
> >> but when I ran the test, I got error message:
> >>
> >> Exception in thread "main" org.drools.runtime.rule.ConsequenceException:
> >> [Error: unable to resolve method:
> >> ValidationHelper.error(org.drools.base.DefaultKnowledgeHelper)
> >> [arglength=1]]
> >>
> >> If I remove the parameter Object... context, then everything worked. But
> I
> >> do need the varargs here because I need my error message to be more
> >> specific.
> >>
> >> Did anyone else encounter the same problems?
> >>
> >>
> >> thanks!
> >>
> >> _______________________________________________
> >> rules-dev mailing list
> >> rules-dev at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-dev
> >>
> >>
> >
> >
> >
> > --
> > Michael D Neale
> > home: www.michaelneale.net
> > blog: michaelneale.blogspot.com
> >
> > _______________________________________________
> > rules-dev mailing list
> > rules-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-dev
> >
> >
> >
> >
> > _______________________________________________
> > rules-dev mailing list
> > rules-dev at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-dev
> >
>
>
>
> --
> Michael D Neale
> home: www.michaelneale.net
> blog: michaelneale.blogspot.com
>
> _______________________________________________
> rules-dev mailing list
> rules-dev at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-dev
>
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