Osma Suominen created JENA-1308:
-----------------------------------
Summary: NullPointerException when using --graph option of sparql
command line tool
Key: JENA-1308
URL: https://issues.apache.org/jira/browse/JENA-1308
Project: Apache Jena
Issue Type: Bug
Components: Cmd line tools
Affects Versions: Jena 3.2.0, Jena 3.3.0
Environment: Ubuntu 16.04
java version "1.8.0_121"
Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
Reporter: Osma Suominen
I tried using the {{--graph}} option for the {{sparql}} command line tool. This
used to work in Jena 3.1.1. However, after upgrading to Jena 3.2.0 or the
3.3.0-SNAPSHOT build I get this NullPointerException instead (this is for
3.3.0-SNAPSHOT):
{noformat}
$ sparql --graph empty.nt --query query.rq
Error creating dataset
java.lang.NullPointerException
at java.util.regex.Matcher.getTextLength(Matcher.java:1283)
at java.util.regex.Matcher.reset(Matcher.java:309)
at java.util.regex.Matcher.<init>(Matcher.java:229)
at java.util.regex.Pattern.matcher(Pattern.java:1093)
at org.apache.jena.iri.impl.Parser.<init>(Parser.java:89)
at org.apache.jena.iri.impl.IRIImpl.<init>(IRIImpl.java:65)
at
org.apache.jena.iri.impl.AbsIRIFactoryImpl.create(AbsIRIFactoryImpl.java:40)
at
org.apache.jena.iri.impl.IRIFactoryImpl.create(IRIFactoryImpl.java:264)
at
org.apache.jena.riot.system.IRIResolver.resolveIRI(IRIResolver.java:266)
at
org.apache.jena.riot.system.IRIResolver.resolveString(IRIResolver.java:219)
at
org.apache.jena.sparql.util.DatasetUtils.addInGraphsWorker(DatasetUtils.java:198)
at
org.apache.jena.sparql.util.DatasetUtils.lambda$addInGraphs$0(DatasetUtils.java:181)
at org.apache.jena.system.Txn.executeWrite(Txn.java:71)
at
org.apache.jena.sparql.util.DatasetUtils.addInGraphs(DatasetUtils.java:181)
at
org.apache.jena.sparql.util.DatasetUtils.addInGraphs(DatasetUtils.java:120)
at arq.cmdline.ModDatasetGeneral.addGraphs(ModDatasetGeneral.java:106)
at
arq.cmdline.ModDatasetGeneral.createDataset(ModDatasetGeneral.java:81)
at
arq.cmdline.ModDatasetGeneralAssembler.createDataset(ModDatasetGeneralAssembler.java:38)
at arq.cmdline.ModDataset.getDataset(ModDataset.java:36)
at arq.query.getDataset(query.java:176)
at arq.query.queryExec(query.java:213)
at arq.query.exec(query.java:153)
at jena.cmd.CmdMain.mainMethod(CmdMain.java:93)
at jena.cmd.CmdMain.mainRun(CmdMain.java:58)
at jena.cmd.CmdMain.mainRun(CmdMain.java:45)
at arq.sparql.main(sparql.java:28)
{noformat}
{{empty.nt}} is empty, {{query.rq}} contains this minimal query:
{noformat}
SELECT * { ?s ?p ?o } LIMIT 10
{noformat}
As a workaround, switching to {{--data}} solves the problem. However, in my
understanding you cannot combine {{--data}} with {{--namedGraph}}.
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