Hi Rob,
Yes that is what I suspect as well, even though when I use a curl function with
content negotiation [1], the returned results look good (and well formed).
Anyway, this is the complete error stack:
com.hp.hpl.jena.sparql.resultset.ResultSetException: Failed when initializing
the StAX parsing engine
at
com.hp.hpl.jena.sparql.resultset.XMLInputStAX.<init>(XMLInputStAX.java:119)
at com.hp.hpl.jena.sparql.resultset.XMLInput.make(XMLInput.java:73)
at com.hp.hpl.jena.sparql.resultset.XMLInput.fromXML(XMLInput.java:42)
at com.hp.hpl.jena.sparql.resultset.XMLInput.fromXML(XMLInput.java:37)
at
com.hp.hpl.jena.query.ResultSetFactory.fromXML(ResultSetFactory.java:312)
at
com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execSelect(QueryEngineHTTP.java:372)
at
de.unibonn.iai.eis.linda.helper.SPARQLHandler.executeQuery(SPARQLHandler.java:41)
at
de.unibonn.iai.eis.linda.helper.SPARQLHandler.getLabelFromNode(SPARQLHandler.java:80)
at
de.unibonn.iai.eis.linda.querybuilder.classes.RDFClass.<init>(RDFClass.java:62)
at
de.unibonn.iai.eis.linda.querybuilder.classes.RDFClass.searchRDFClass(RDFClass.java:228)
at
de.unibonn.iai.eis.linda.querybuilder.classes.RDFClass.searchRDFClass(RDFClass.java:222)
at com.servlet.routes.BuilderRoute.getProperties(BuilderRoute.java:172)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
Cheers,
Jeremy
[1] curl -H "Accept: application/sparql-results+xml" -g
"http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query=PREFIX+rdf%3A%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23%3E+PREFIX+rdfs%3A%3Chttp%3A%2F%2Fwww.w3.org%2F2000%2F01%2Frdf-schema%23%3E+PREFIX+owl%3A%3Chttp%3A%2F%2Fwww.w3.org%2F2002%2F07%2Fowl%23%3E++SELECT+distinct+%3Fclass+%3Flabel++WHERE+%7B+%7B%3Fclass+rdf%3Atype+owl%3AClass%7D+UNION+%7B%3Fclass+rdf%3Atype+rdfs%3AClass%7D.+%3Fclass+rdfs%3Alabel+%3Flabel.+++FILTER%28bound%28%3Flabel%29++%26%26+REGEX%28%3Flabel%2C+%22%5C%5Cbact%22%2C%22i%22%29%29%7D+ORDER+BY+%3Fclass%0D%0A”
On 13 May 2015, at 12:32, Rob Vesse <[email protected]> wrote:
> What is the error message you get?
>
> It is not unheard of for Virtuoso (the software that powers DBPedia) to
> produce bad output particularly if the data has not been appropriately
> sanitised so I would suspect Virtuoso before suspecting Jena in a case
> like this
>
> Rob
>
> On 13/05/2015 10:16, "Jeremy Debattista" <[email protected]> wrote:
>
>> Dear All,
>>
>> I am trying to query the DBpedia SPARQL endpoint using the
>> QueryExecutionFactory sparqlService and execSelect(), but I’m given the
>> following error: com.hp.hpl.jena.sparql.resultset.ResultSetException:
>> Failed when initializing the StAX parsing engine
>>
>> The query in question is
>> PREFIX rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX
>> rdfs:<http://www.w3.org/2000/01/rdf-schema#> PREFIX
>> owl:<http://www.w3.org/2002/07/owl#> SELECT distinct ?class ?label
>> WHERE { {?class rdf:type owl:Class} UNION {?class rdf:type rdfs:Class}.
>> ?class rdfs:label ?label. FILTER(bound(?label) && REGEX(?label,
>> "\\bact","i"))} ORDER BY ?class
>>
>> which gives a result in dbpedia sparql web interface [1].
>>
>> The code in question is the following:
>>
>> public static ResultSet executeQuery(String uri, String queryString) {
>> Query query = QueryFactory.create(queryString);
>> QueryExecution qexec = QueryExecutionFactory.sparqlService(uri, query);
>> try {
>> ResultSet results = qexec.execSelect();
>> return results;
>> } finally {
>>
>> }
>> }
>>
>> After debugging, the problem seems to be related to how the XML parser is
>> reading the stream input. Would you have any other idea how I can go
>> around it?
>>
>> Best Regards,
>> Jeremy
>>
>>
>>
>> [1]
>> http://dbpedia.org/sparql?default-graph-uri=http%3A%2F%2Fdbpedia.org&query
>> =PREFIX+rdf%3A%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23
>> %3E+PREFIX+rdfs%3A%3Chttp%3A%2F%2Fwww.w3.org%2F2000%2F01%2Frdf-schema%23%3
>> E+PREFIX+owl%3A%3Chttp%3A%2F%2Fwww.w3.org%2F2002%2F07%2Fowl%23%3E++SELECT+
>> distinct+%3Fclass+%3Flabel++WHERE+%7B+%7B%3Fclass+rdf%3Atype+owl%3AClass%7
>> D+UNION+%7B%3Fclass+rdf%3Atype+rdfs%3AClass%7D.+%3Fclass+rdfs%3Alabel+%3Fl
>> abel.+++FILTER%28bound%28%3Flabel%29++%26%26+REGEX%28%3Flabel%2C+%22%5C%5C
>> bact%22%2C%22i%22%29%29%7D+ORDER+BY+%3Fclass%0D%0A&format=text%2Fhtml&time
>> out=30000&debug=on
>
>
>
>
