Hello,
I recently changed how I was storing my queries to use the spin:query
property, instead of the sparql:query property. Now, when running the below
code to retrieve those queries, I am sometimes (but not always) getting the
below exception. As a work around I can move the queries back to use the
sparql:query property where it is stored as a string literal. No big deal
since I have a work around, but wanted to let you know what I'm seeing.
LIBRARY VERSIONS:
Arq-2.8.8
Jena-2.6.4
Spin-1.2.0
Spin-base-1.2.0
Tdb-0.8.10
CODE TO RETRIEVE QUERY:
org.topbraid.spin.model.Query spinQuery = SPINFactory
.asQuery(spinQueryRes);
StringBuilder queryBldr = new StringBuilder();
StringPrintContext printCntxt = new
StringPrintContext(queryBldr);
printCntxt.setPrintPrefixes(false);
spinQuery.print(printCntxt);
this.sparql = ResourceFactory.createTypedLiteral(queryBldr
.toString(), XSDDatatype.XSDstring);
EXCEPTION:
java.lang.NullPointerException
at
com.hp.hpl.jena.tdb.store.GraphTDBBase.graphBaseFindWorker(GraphTDBBase.java:131)
at
com.hp.hpl.jena.tdb.store.GraphNamedTDB.graphBaseFind(GraphNamedTDB.java:105)
at
com.hp.hpl.jena.sparql.graph.GraphBase2.find(GraphBase2.java:232)
at
com.hp.hpl.jena.sparql.core.Reifier2.findExposed(Reifier2.java:189)
at
com.hp.hpl.jena.graph.impl.GraphBase.reifierTriples(GraphBase.java:318)
at com.hp.hpl.jena.graph.impl.GraphBase.find(GraphBase.java:240)
at
com.hp.hpl.jena.graph.impl.GraphBase.graphBaseFind(GraphBase.java:260)
at com.hp.hpl.jena.graph.impl.GraphBase.find(GraphBase.java:257)
at
com.hp.hpl.jena.rdf.model.impl.ModelCom.listStatements(ModelCom.java:378)
at
com.hp.hpl.jena.rdf.model.impl.ModelCom.listStatements(ModelCom.java:383)
at
com.hp.hpl.jena.rdf.model.impl.ModelCom.getProperty(ModelCom.java:1003)
at
com.hp.hpl.jena.rdf.model.impl.ResourceImpl.getProperty(ResourceImpl.java:154)
at
org.topbraid.spin.model.impl.FunctionCallImpl.getSymbol(FunctionCallImpl.java:156)
at
org.topbraid.spin.model.impl.FunctionCallImpl.print(FunctionCallImpl.java:174)
at
org.topbraid.spin.util.SPINExpressions.printExpressionString(SPINExpressions.java:189)
at
org.topbraid.spin.model.impl.AbstractSPINResourceImpl.printNestedExpressionString(AbstractSPINResourceImpl.java:146)
at
org.topbraid.spin.model.impl.FilterImpl.print(FilterImpl.java:46)
at
org.topbraid.spin.model.impl.ElementListImpl.print(ElementListImpl.java:139)
at
org.topbraid.spin.model.impl.AbstractSPINResourceImpl.printNestedElementList(AbstractSPINResourceImpl.java:132)
at
org.topbraid.spin.model.impl.QueryImpl.printWhere(QueryImpl.java:177)
at
org.topbraid.spin.model.impl.SelectImpl.print(SelectImpl.java:99)
at
com.boeing.sparqlflow.QueryInfo.setQueryInfo(QueryInfo.java:69)
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