Hi Heiko,
If you move the qe.close() statement after the try/catch block it will
solve your exception. This type of errors appear when you close
the QueryExecutionFactory before you access the resultset.
I've tested it and it works fine:
QueryExecution qe =
QueryExecutionFactory.sparqlService("http://dbpedia.org/sparql","select
distinct ?p where {<http://dbpedia.org/resource/Darmstadt> ?p ?o} ORDER BY
?p");
ResultSet rs = qe.execSelect();
try {
for (; rs.hasNext();)
System.out.println(rs.next().get("p"));
} catch (Exception e) {
System.out.println(e);
}
qe.close();
}
Cheers,
Alexandru
On Thu, Nov 22, 2012 at 2:46 PM, Heiko Paulheim <[email protected]
> wrote:
> Yes, the exception is still there. In fact, my test program only consists
> of those lines, so there is only one query issued.
>
> Best,
> Heiko
>
>
> Am 22.11.2012 14:37, schrieb Alexandru Todor:
>
> Hi Heiko,
>
> I'm not sure, but could you try closing the QueryExecutionFactory after
> the try/catch block and see if you still have the same error ?
>
> Regards,
> Alexandru
>
> On Thu, Nov 22, 2012 at 1:06 PM, Heiko Paulheim <
> [email protected]> wrote:
>
>> Dear DBpedians,
>>
>> this is a rather odd problem (see exception below) when querying DBpedia
>> via JENA+SPARQL (sample code below). The query itself seems sane and can
>> also be executed without any problems using the web interface:
>> select distinct ?p where {<http://dbpedia.org/resource/Darmstadt> ?p
>> ?o} ORDER BY ?p
>>
>> The exception seems to occur when the iterator steps from
>> http://dbpedia.org/property/marHighC
>> to
>> http://dbpedia.org/property/marLowC
>> both of which do not contain any special characters or the like.
>>
>> Any ideas, anyone?
>>
>> Best,
>> Heiko
>>
>> The exception I get is (message translated: "XML document structures
>> have to begin and end with the same element"):
>> javax.xml.stream.XMLStreamException: ParseError at [row,col]:[232,57]
>> Message: XML-Dokumentstrukturen müssen innerhalb derselben Entität
>> beginnen und enden.
>> at
>>
>> com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.next(XMLStreamReaderImpl.java:592)
>> at
>>
>> com.sun.org.apache.xerces.internal.impl.XMLStreamReaderImpl.getElementText(XMLStreamReaderImpl.java:836)
>> at
>>
>> com.hp.hpl.jena.sparql.resultset.XMLInputStAX$ResultSetStAX.getOneSolution(XMLInputStAX.java:506)
>> at
>>
>> com.hp.hpl.jena.sparql.resultset.XMLInputStAX$ResultSetStAX.hasNext(XMLInputStAX.java:231)
>>
>>
>>
>> My code:
>> QueryExecution qe =
>> QueryExecutionFactory.sparqlService("http://dbpedia.org/sparql";,
>> "select distinct ?p where
>> {<http://dbpedia.org/resource/Darmstadt> ?p ?o} ORDER BY ?p");
>> ResultSet rs = qe.execSelect();
>>
>> qe.close();
>>
>> try {
>> for (; rs.hasNext();)
>> System.out.println(rs.next().get("p"));
>> } catch (Exception e) {
>> System.out.println(e);
>> }
>>
>> --
>> Dr. Heiko Paulheim
>> Knowledge Engineering Group
>> Technische Universität Darmstadt
>> Phone: +49 6151 16 6634 <%2B49%206151%2016%206634>
>> Fax: +49 6151 16 5482 <%2B49%206151%2016%205482>
>> http://www.ke.tu-darmstadt.de/staff/heiko-paulheim
>>
>>
>>
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>
>
> --
> Dr. Heiko Paulheim
> Knowledge Engineering Group
> Technische Universität Darmstadt
> Phone: +49 6151 16 6634
> Fax: +49 6151 16 5482http://www.ke.tu-darmstadt.de/staff/heiko-paulheim
>
>
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