Andy Why does pulling that in fix things?
Rob On 13/05/2015 14:24, "Andy Seaborne" <[email protected]> wrote: >Workaround: > >Add jena-text to the dependencies > >:-) > >jena-text > depends on solr-solrj > depends on org.codehaus.woodstox:wstx-asl > > Andy > >On 13/05/15 13:59, Jeremy Debattista wrote: >> Hi Andy, >> >> Thanks for your reply, but I didn’t really get how you set the input >>stream to 1.0. Unfortunately, in Jena we cannot use: >>application/sparql-results+json as a content type since a select query >>has a preset content type in the QueryEngineHTTP class. >> >> Cheers, >> Jer >> On 13 May 2015, at 14:38, Andy Seaborne <[email protected]> wrote: >> >>> The DBpedia response has a processing directive: >>> >>> <?xml version="1.1" ?> >>> >>> not XML "1.0" (or default) Setting it to "1.0" and I worked for me. >>>I don't see any XML 1.1 feature being used. >>> >>> It fails because there is no XML 1.1 parser registered. >>> >>> ((The results aren't schema conforming anyway distinct= and ordered= >>>aren't in the standard, not that it is checked)) >>> >>> There aren't many XML 1.1 parsers about and the uptake of XML 1.1 is >>>low. There are issues due to the strictness for character sets in XML >>>parsing - invalid documents becoming valid is a big deal of that >>>document is a business process document i.e. $$$ is involved and its a >>>security issue. >>> >>> Anyone know how to ignore the processing directive and have Jena setup >>>the parser factory anyway? >>> >>> Workaround: use a different like the JSON format. >>> >>> Andy >>> >>> >>> On 13/05/15 12:27, Jeremy Debattista wrote: >>>> 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:31 >>>>2) >>>> at >>>>com.hp.hpl.jena.sparql.engine.http.QueryEngineHTTP.execSelect(QueryEngi >>>>neHTTP.java:372) >>>> at >>>>de.unibonn.iai.eis.linda.helper.SPARQLHandler.executeQuery(SPARQLHandle >>>>r.java:41) >>>> at >>>>de.unibonn.iai.eis.linda.helper.SPARQLHandler.getLabelFromNode(SPARQLHa >>>>ndler.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(R >>>>DFClass.java:228) >>>> at >>>>de.unibonn.iai.eis.linda.querybuilder.classes.RDFClass.searchRDFClass(R >>>>DFClass.java:222) >>>> at >>>>com.servlet.routes.BuilderRoute.getProperties(BuilderRoute.java:172) >>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >>>> at >>>>sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.ja >>>>va:57) >>>> at >>>>sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccesso >>>>rImpl.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&q >>>>uery=PREFIX+rdf%3A%3Chttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-synta >>>>x-ns%23%3E+PREFIX+rdfs%3A%3Chttp%3A%2F%2Fwww.w3.org%2F2000%2F01%2Frdf-s >>>>chema%23%3E+PREFIX+owl%3A%3Chttp%3A%2F%2Fwww.w3.org%2F2002%2F07%2Fowl%2 >>>>3%3E++SELECT+distinct+%3Fclass+%3Flabel++WHERE+%7B+%7B%3Fclass+rdf%3Aty >>>>pe+owl%3AClass%7D+UNION+%7B%3Fclass+rdf%3Atype+rdfs%3AClass%7D.+%3Fclas >>>>s+rdfs%3Alabel+%3Flabel.+++FILTER%28bound%28%3Flabel%29++%26%26+REGEX%2 >>>>8%3Flabel%2C+%22%5C%5Cbact%22%2C%22i%22%29%29%7D+ORDER+BY+%3Fclass%0D%0 >>>>A” >>>> >>>> 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++SE >>>>>>LECT+ >>>>>> >>>>>>distinct+%3Fclass+%3Flabel++WHERE+%7B+%7B%3Fclass+rdf%3Atype+owl%3ACl >>>>>>ass%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 >>>>> >>>>> >>>>> >>>>> >>>> >>>> >>> >> >> >
