RE: [TM4J-users] loading problem

[Kal A. <ka...@te...>]

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 :)
>
>
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