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RE: [TM4J-users] loading problem
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From: Kal A. <ka...@te...> - 2001-06-19 16:25:15
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Hi Rich,
>
> You're right in that it's merging. :) I'm not sure why, though...
>
Tracked it down - the subjectIndicatorRef was the culprit after all! When
the XTMBuilder sees the subjectIndicatorRef, it tries to locate a topic with
that subject indicator and creates it if it doesn't exist - the upshot is
that your topic then gets merged with that dummy topic that was created.
The fix to this is in XTMBuilder.java, line 294(ish).
change:
case REFTYPE_SUBJECTINDICATOR:
refTopic = getTopicBySubjectIndicator(expandedRef);
break;
to
case REFTYPE_SUBJECTINDICATOR:
if (purpose != SUBJECTIDENTITY)
{
refTopic = getTopicBySubjectIndicator(expandedRef);
}
break;
I'm currently away from my Linux machine and can't seem to check this change
in from my (Windoze) laptop (grrr....), but hopefully this should fix your
problem.
Cheers,
Kal
> This is the entire TM:
>
> <?xml version="1.0" encoding="utf-8" standalone="yes" ?>
> <topicMap xmlns="http://www.topicmaps.org/xtm/1.0/"
> xmlns:xlink="http://www.w3.org/1999/xlink"
> xml:base="http://ideabank.csir.co.za/test2.xml">
>
> <topic id="kim">
> <baseName>
> <baseNameString>Kim</baseNameString>
> </baseName>
>
> <instanceOf>
> <topicRef
> xlink:href="http://ideabank.csir.co.za/ib.defs.xml#person"/>
> </instanceOf>
> <subjectIdentity>
> <subjectIndicatorRef
> xlink:href="http://ideabank.csir.co.za/data#role"/>
> </subjectIdentity>
> </topic>
> </topicMap>
>
> And I'm loading it by itself. The subjectIdentityRef is a red herring
> (sorry :), I only used that as an example.
>
> But that still helps a lot so far, thanks :)
> Rich
>
> > -----Original Message-----
> > From: tm4...@li...
> > [mailto:tm4...@li...]On Behalf Of Kal Ahmed
> > Sent: 19 June 2001 04:40
> > To: tm4...@li...
> > Subject: RE: [TM4J-users] loading problem
> >
> >
> > Hi Rich,
> >
> > I think that it is possible that the topic is getting merged with
> > some other
> > topic. In your example, you have
> >
> > <topic id="kim">
> > <baseName>
> > <baseNameString>Kim</baseNameString>
> > </baseName>
> >
> > <instanceOf>
> > <topicRef
> > xlink:href="http://ideabank.csir.co.za/ib.defs.xml#person"/>
> > </instanceOf>
> > <subjectIdentity>
> > <subjectIndicatorRef
> > xlink:href="http://ideabank.csir.co.za/data#role"/>
> > </subjectIdentity>
> > </topic>
> >
> > This would get merged with any topic which has the same
> > subjectIndicatorRef - I am just guessing from the URL of the
> > subjectIndicatorRef, that it is not meant to be unique to Kim.
> >
> > The TopicMap.getTopics() returns all of the base topics - any
> > merged topics
> > are not included in the returned collection. Perhaps there should be a
> > TopicMap.getAllTopics() function that includes the merged
> topics in there.
> > As a test, when you iterate through the collection, also call
> > Topic.getMergedTopics() and iterate through that - my hunch is
> that Kim is
> > lurking in there somewhere :-)
> >
> > Cheers,
> >
> > Kal
> >
> > > -----Original Message-----
> > > From: tm4...@li...
> > > [mailto:tm4...@li...]On Behalf Of Richard
> > > Watson
> > > Sent: 19 June 2001 15:24
> > > To: TM4J Users
> > > Subject: [TM4J-users] loading problem
> > >
> > >
> > > Hi all,
> > >
> > > Got an interesting one. Java code that produces a strange result
> > > as soon as
> > > a subjectIdentity is added to a topic.
> > >
> > > Java code:
> > >
> > > (obviously uses some of my own stuff, but you'll get the idea)
> > >
> > > // largely irrelevant but just so you know :)
> > > PersistenceManager p = PersistenceManager.getPersistenceManager();
> > > String strObject = "http://ideabank.csir.co.za/test2.xml#kim";
> > > TopicMap tm = p.getTopicMapForURL(new URL(strObject));
> > >
> > > // here's the interesting bit
> > > Topic o = (Topic)tm.getObjectByResourceID(strObject);
> > > System.out.println("object " + o);
> > > System.out.println("contains object: " + tm.getTopics().contains(o));
> > >
> > > which produces output:
> > > object com.techquila.topicmap.TopicImpl@d3147aed
> > > contains object: false
> > >
> > > from this xml:
> > >
> > > <topic id="kim">
> > > <baseName>
> > > <baseNameString>Kim</baseNameString>
> > > </baseName>
> > >
> > > <instanceOf>
> > > <topicRef
> > > xlink:href="http://ideabank.csir.co.za/ib.defs.xml#person"/>
> > > </instanceOf>
> > > <subjectIdentity>
> > > <subjectIndicatorRef
> > > xlink:href="http://ideabank.csir.co.za/data#role"/>
> > > </subjectIdentity>
> > > </topic>
> > >
> > > and this output:
> > >
> > > object com.techquila.topicmap.TopicImpl@e79ef0b9
> > > contains object: true
> > >
> > > <topic id="kim">
> > > <baseName>
> > > <baseNameString>Kim</baseNameString>
> > > </baseName>
> > >
> > > <instanceOf>
> > > <topicRef
> > > xlink:href="http://ideabank.csir.co.za/ib.defs.xml#person"/>
> > > </instanceOf>
> > > </topic>
> > >
> > > I've round-tripped it as best I could, and it spits out:
> > >
> > > <topic>
> > > <instanceOf>
> > > <topicRef
> > > xlink:href="http://ideabank.csir.co.za/ib.defs.xml#person"/>
> > > </instanceOf>
> > > <subjectIdentity>
> > > <subjectIndicatorRef
> > > xlink:href="http://ideabank.csir.co.za/data#role"/>
> > > </subjectIdentity>
> > > <baseName>
> > > <baseNameString>Kim</baseNameString>
> > > </baseName>
> > > </topic>
> > >
> > > (observe the removed topic id)
> > > This works fine for the first version (i.e. keeps the id).
> > >
> > > Also, while iterating through the topics, I find no resourceid
> > for "kim".
> > > But if I print out the o.resourceID above, I get the right one.
> > >
> > > So: iterating through the topics _does_ find a topic with the right
> > > information but the wrong resourceID, and using
> > tm.getObjectByResourceID()
> > > finds a topic with the right resourceid.
> > >
> > > Cheers,
> > > Rich the bug hunter :)
> > >
> > >
> > > _______________________________________________
> > > Tm4j-users mailing list
> > > Tm4...@li...
> > > http://lists.sourceforge.net/lists/listinfo/tm4j-users
> > >
> >
> >
> > _______________________________________________
> > Tm4j-users mailing list
> > Tm4...@li...
> > http://lists.sourceforge.net/lists/listinfo/tm4j-users
> >
>
>
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