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[protege-owl] [POSSIBLE VIRUS:###] Re: problem with SWRLRuleEngineBridge

Hrishikesh Sharma hrishikesh.sharma at gmail.com
Fri Aug 10 03:47:08 PDT 2007


Thanks!
Can't do much but shake head in disbelief that one can do such silly
mistakes also :-))

Regards
      Hrishikesh.

On 8/9/07, Martin O'Connor <martin.oconnor at stanford.edu> wrote:
>
> The output exactly matches the asserted properties in the SWRLJessTab.
> You are misinterpreting the output because you are not printing the
> asserted property name.
>
> Martin
>
> Quoting Hrishikesh Sharma <hrishikesh.sharma at gmail.com>:
>
> > Attached here is the cleaned-up printing code extracted from my overall
> > application. The class containing main() method is the BridgeWrapper
> class.
> > MyBridge extends SWRLJessBridge class. The ontology used in my work and
> a
> > corresponding repository file(needs to be edited) are also there.
> > The output is still wrong, and same as I quoted in yesterday's mail. If
> > getAssertedProperties() is well-tested indeed, then the bug has to be in
> my
> > code, help me catch it :-)
> >
> > Regards
> >         Hrishikesh.
> >
> >
> > On 8/9/07, Martin O'Connor <martin.oconnor at stanford.edu> wrote:
> >>
> >> The getAssertedProperties call work fine for me with your ontology.
> >> Lots of code depends on the getAssertedProperties call (including the
> >> SWRLJessTab displays) so I would rewrite your printing code (which is
> >> very confusing).
> >>
> >> Martin
> >>
> >> (and Quoting Hrishikesh Sharma <hrishikesh.sharma at gmail.com >:
> >>
> >> > There seems to be a serious bug?? with with getAssertedProperties().
> I
> >> > was suggested(see the mail chain below) to extend SWRLJessBridge
> class
> >> > to do what I required.
> >> > I am using the attached ontology and sample instances to run some
> rules.
> >>
> >> > When I use the Protege editor(front-end) and use JessTab and execute
> >> > JESS rule engine, I can see all the asserted properties, right ones,
> >> > in the appropriate pane as follows.
> >> >
> >> > (assert (needsBatAlarm Lenovo "true"))
> >> > (assert (needsCharging Lenovo "true"))
> >> > (assert (possCharging Lenovo "true"))
> >> >
> >> > While when I use SWRLJessBridge and enumerate all the asserted
> >> > properties, I get garbled output.
> >> >
> >> > Lenovo
> >> > true
> >> > Lenovo
> >> > true
> >> > Didier_Bourse
> >> > true
> >> > Lenovo
> >> > true
> >> >
> >> > The subclass that I implemented on your suggestion is also attached.
> I
> >> > am almost sure it is a bug with the bridge code. I desperately need
> to
> >> > have/demonstrate a standalone application in Java which uses
> >> > SWRLJessBridge. Please help.
> >> >
> >> > Regards
> >> >          Hrishikesh.
> >> >
> >> > On 7/25/07, Martin O'Connor < martin.oconnor at stanford.edu> wrote:
> >> >>
> >> >>
> >> >> The bridge is documented extensively here:
> >> >> http://protege.cim3.net/cgi-bin/wiki.pl?SWRLRuleEngineBridgeFAQ
> >> >>
> >> >> You can access protected methods using the standard Java subclassing
> >> >> technique, viz:
> >> >>
> >> >>
> >> >>
> >> >> public class MyBridge extends JessRuleEngineBridge
> >> >>
> >> >> {
> >> >>
> >> >>    .
> >> >>
> >> >>    public Set<RuleInfo> myGetImportedSWRLRules() { return
> >> >> getImportedSWRLRules(); }
> >> >>
> >> >>
> >> >>
> >> >> etc.
> >> >>
> >> >>
> >> >>
> >> >> Martin
> >> >>
> >> >>
> >> >>
> >> >>   _____
> >> >>
> >> >> From: protege-owl-bounces at lists.stanford.edu
> >> >> [mailto:protege-owl-bounces at lists.stanford.edu] On Behalf Of
> Hrishikesh
> >> >> Sharma
> >> >> Sent: Wednesday, July 25, 2007 7:21 AM
> >> >> To: protege-owl at lists.stanford.edu
> >> >> Subject: Re: [protege-owl] problem with SWRLRuleEngineBridge
> >> >>
> >> >>
> >> >> Essentially my problem is (at least) twofold:
> >> >> 1. The javadocs for SWRLRuleEngineBridge and SWRLJessBridge give too
> >> less
> >> >> information. Various methods I try to invoke based on some
> approximate
> >> >> understanding misfire!
> >> >> 2. How to get hold of the delta between new overall knowledge after
> a
> >> Jess
> >> >> run, and the old knowledge in Java code. In the front end, I am able
> to
> >> do
> >> >> same by examining the "Asserted Properties/Individuals" sub-tab
> within
> >> Jess
> >> >> Tab.
> >> >>
> >> >>
> >> >> Sincerely,
> >> >>
> >> >>         Hrishikesh.
> >> >>
> >> >>
> >> >> On 7/24/07, Martin O'Connor <martin.oconnor at stanford.edu> wrote:
> >> >>
> >> >>
> >> >> You are trying to call a protected method in this code fragment.
> >> >> Invoking through the SWRLJessBridge does not make it unprotected -
> only
> >> >> code inside the SWRLJessBridge can access it.
> >> >>
> >> >> Martin
> >> >>
> >> >> Hrishikesh Sharma wrote:
> >> >>
> >> >> > Hi,
> >> >> >     I am having problem with getAssertedProperties() method of
> >> >> > SWRLRuleEngineBridge Class. From the javadoc, I gather it is a
> >> >> > protected method. However, in the simple java code file attached,
> >> >> > where I invoke this method from a subclass called SWRLJessBridge,
> I
> >> >> > get a compilation error
> >> >> >
> >> >> > RunSwrlOnOnt.java:30: getAssertedProperties() has protected access
> in
> >> >> > edu.stanford.smi.protegex.owl.swrl.bridge.SWRLRuleEngineBridge
> >> >> >          Collection ass_p = bridge.getAssertedProperties ();
> >> >> >                                   ^
> >> >> > It is a bit surprising, for SWRLJessBridge is supposed to be
> subclass
> >> >> > and hence have access to protected methods of the superclass from
> >> >> > within objects of that type. Am I missing something trivial here?
> Or
> >> >> > is it a bug(missing 'extends' definition for SWRLJessBridge)? Or
> is
> >> >> > the method getAssertedProperties() an abstract method?
> >> >> >
> >> >> > Sincerely,
> >> >> >        Hrishikesh
> >> >
> >>
> >>
> >> _______________________________________________
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> >>
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> >
> >
> >
> > --
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> - +
> > - + - + - + - + - + - +- + - + - +
> >
> > Literature is my legal wife and medicine my mistress. When I get tired
> of
> > one, I spend the night with the other.
> >
> > Anton Chekhov in a letter to Alexey Suvorin
> >
>
>
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-- 
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Literature is my legal wife and medicine my mistress. When I get tired of
one, I spend the night with the other.

Anton Chekhov in a letter to Alexey Suvorin
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