Hello,
First of all congratulations for the great work you have done with the JENA
API .My name is Nagore and I'm developing my thesis and for that I need to
make a prototype that enables me to read my rdf files and SPARQL queries
performed on them . So I thought using Jena and when I drove to make my
first test, I ran into the following error:
*Exception in thread " main" org.apache.jena.riot.RiotException : Invalid
byte 1 of 1 - byte UTF -8 sequence .*
*at org.apache.jena.riot.system.ErrorHandlerFactory $ ErrorHandlerStd.fatal
( ErrorHandlerFactory.java : 136 )*
*org.apache.jena.riot.lang.LangRDFXML at $ ErrorHandlerBridge.fatalError (
LangRDFXML.java : 243 )*
*at com.hp.hpl.jena.rdf.arp.impl.ARPSaxErrorHandler.fatalError (
ARPSaxErrorHandler.java : 48 )*
*at com.hp.hpl.jena.rdf.arp.impl.XMLHandler.warning ( XMLHandler.java :
209)*
*at com.hp.hpl.jena.rdf.arp.impl.XMLHandler.fatalError ( XMLHandler.java :
239 )*
*org.apache.xerces.util.ErrorHandlerWrapper.fatalError at ( Unknown Source
)*
*org.apache.xerces.impl.XMLErrorReporter.reportError at ( Unknown Source )*
*org.apache.xerces.impl.XMLErrorReporter.reportError at ( Unknown Source )*
*org.apache.xerces.impl.XMLDocumentFragmentScannerImpl at $
FragmentContentDispatcher.dispatch ( Unknown Source )*
*org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument at (
Unknown Source )*
*org.apache.xerces.parsers.DTDConfiguration.parse at ( Unknown Source )*
*org.apache.xerces.parsers.DTDConfiguration.parse at ( Unknown Source )*
*at org.apache.xerces.parsers.XMLParser.parse ( Unknown Source )*
*at org.apache.xerces.parsers.AbstractSAXParser.parse ( Unknown Source )*
*at com.hp.hpl.jena.rdf.arp.impl.RDFXMLParser.parse ( RDFXMLParser.java :
151 )*
*at com.hp.hpl.jena.rdf.arp.ARP.load ( ARP.java : 119 )*
*at org.apache.jena.riot.lang.LangRDFXML.parse ( LangRDFXML.java : 142 )*
*org.apache.jena.riot.RDFParserRegistry at $ ReaderRIOTFactoryImpl $ 1.read
( RDFParserRegistry.java : 142 )*
*at org.apache.jena.riot.RDFDataMgr.process ( RDFDataMgr.java : 818)*
*at org.apache.jena.riot.RDFDataMgr.parse ( RDFDataMgr.java : 679 )*
*at org.apache.jena.riot.RDFDataMgr.read ( RDFDataMgr.java : 211 )*
*at org.apache.jena.riot.RDFDataMgr.read ( RDFDataMgr.java : 184 )*
*at org.apache.jena.riot.RDFDataMgr.read ( RDFDataMgr.java : 122 )*
*at org.apache.jena.riot.RDFDataMgr.read ( RDFDataMgr.java : 113 )*
*at org.apache.jena.riot.adapters.RDFReaderRIOT.read ( RDFReaderRIOT.java :
77 )*
*at com.hp.hpl.jena.rdf.model.impl.ModelCom.read ( ModelCom.java : 247 )*
*at com.hp.hpl.jena.util.FileManager.readModelWorker ( FileManager.java :
395 )*
*at com.hp.hpl.jena.util.FileManager.loadModelWorker ( FileManager.java :
326 )*
*at com.hp.hpl.jena.util.FileManager.loadModel ( FileManager.java : 278 )*
*at tutorial.prueba.sparqlTest ( prueba.java : 38 )*
*at tutorial.prueba.main ( prueba.java : 30 )*
This would be my code:
*package tutorial ;*
*javax.management.Query import ;*
*org.apache.jena.iri.impl.Main import ;*
*import com.hp.hpl.jena * . ;*
*com.hp.hpl.jena.query.QueryExecution import ;*
*com.hp.hpl.jena.query.QueryExecutionFactory import ;*
*com.hp.hpl.jena.query.QueryFactory import ;*
*com.hp.hpl.jena.query.QuerySolution import ;*
*com.hp.hpl.jena.query.ResultSet import ;*
*com.hp.hpl.jena.rdf.model.Literal import ;*
*com.hp.hpl.jena.rdf.model.Model import ;*
*com.hp.hpl.jena.util.FileManager import ;*
*public class Test {*
*public static void main ( String args [ ] )*
*{*
*sparqlTest ( ) ;*
*}*
*static void sparqlTest ()*
*{*
*FileManager.get () addLocatorClassLoader ( Main.class.getClassLoader ()).
;*
*FileManager.get Model model = () loadModel (
" http://localhost/loadtest.rdf <http://localhost/loadtest.rdf> ") ;*
*String querys =*
*" PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#
<http://www.w3.org/1999/02/22-rdf-syntax-ns#>> " +*
*" PREFIX gr: <htto://purl.org/goodrelations/v1#
<http://purl.org/goodrelations/v1#>> " +*
*"SELECT * WHERE { " +*
*"? p to gr: offering " +*
*" ? p gr : name x ? " +*
*" }";*
*com.hp.hpl.jena.query.Query QueryFactory.create q = ( querys );*
*QueryExecution QueryExecutionFactory.create exe = ( q , model );*
*try {*
*ResultSet result = exe.execSelect ();*
*while ( result.hasNext ())*
*{*
*QuerySolution result.nextSolution sun = ();*
*Sol.getLiteral name = Literal ("x" );*
*System.out.println ();*
*}*
*finally { }*
*exe.close ( ) ;*
*}*
*}*
*}*
and my rdf file :
*<? xml version = "1.0 " encoding = "UTF -8 ">*
*< rdf : RDF xmlns: g = " http://purl.org/goodrelations/v1
<http://purl.org/goodrelations/v1> #" xmlns: xsd =
" http://www.w3.org/2001/XMLSchema <http://www.w3.org/2001/XMLSchema> #"
xmlns: rdf = " http:/ / www.w3.org/1999/02/22-rdf-syntax-ns
<http://www.w3.org/1999/02/22-rdf-syntax-ns> # " >*
*< g : offering*
*<gr:condition> available with different options < / g : condition>*
*<gr:hasPriceSpecification>*
*<gr:UnitPriceSpecification>*
*<gr:hasCurrencyValue rdf:datatype="http://www.w3.org/2001/XMLSchema#float
<http://www.w3.org/2001/XMLSchema#float>"> € 279.66 < / gr:
hasCurrencyValue >*
*< / gr: UnitPriceSpecification >*
*< / gr: hasPriceSpecification >*
*< g : image / >*
*<gr:name> bicycle training roller Roller Elite AL13 < / gr: name>*
*< / gr: offering>*
*< g : offering*
*<gr:condition> available with different options < / g : condition>*
*<gr:hasPriceSpecification>*
*<gr:UnitPriceSpecification>*
*<gr:hasCurrencyValue rdf:datatype="http://www.w3.org/2001/XMLSchema#float
<http://www.w3.org/2001/XMLSchema#float>"> € 444.23 < / gr:
hasCurrencyValue >*
*< / gr: UnitPriceSpecification >*
*< / gr: hasPriceSpecification >*
*< g : image / >*
*<gr:name> bicycle training roller Arion Digital Elite Roller < / gr: name>*
*< / gr: offering>*
*< / rdf : RDF >*
I hope your answer,
Regards,
2013/12/10 Martynas Jusevičius <[email protected]>
> Hey,
>
> after upgrade to 2.11.0 I get this exception during Graph Store
> Protocol request:
>
> org.apache.jena.atlas.web.HttpException: 411 - Length Required
> org.apache.jena.riot.web.HttpOp.exec(HttpOp.java:1020)
> org.apache.jena.riot.web.HttpOp.execHttpPost(HttpOp.java:633)
> org.apache.jena.riot.web.HttpOp.execHttpPost(HttpOp.java:601)
>
> org.apache.jena.web.DatasetGraphAccessorHTTP.doPost(DatasetGraphAccessorHTTP.java:184)
>
> org.apache.jena.web.DatasetGraphAccessorHTTP.httpPost(DatasetGraphAccessorHTTP.java:179)
> org.apache.jena.web.DatasetAdapter.add(DatasetAdapter.java:98)
> org.graphity.server.util.DataManager.addModel(DataManager.java:440)
>
> Has something changed wrt to Content-Length? I guess I'll need to
> extend DatasetGraphAccessorHTTP... Or is there an easier way to work
> around this?
>
> Martynas
> graphityhq.com
>
--
Nagore Salaberria<[email protected]>
