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https://issues.apache.org/jira/browse/JENA-792?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Seaborne closed JENA-792.
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Resolution: Fixed
Fix Version/s: Jena 2.12.2
Assignee: Andy Seaborne
Fixed as you describe. Thank you.
> DatasetGraphCollection throws NullPointerException when calling contains()
> with non-existing graph
> --------------------------------------------------------------------------------------------------
>
> Key: JENA-792
> URL: https://issues.apache.org/jira/browse/JENA-792
> Project: Apache Jena
> Issue Type: Bug
> Components: Jena
> Affects Versions: Jena 2.12.0
> Environment: Ubuntu 14.04 and Eclipse Luna. Jena, Fuseki, and JUnit
> on the classpath.
> Reporter: Gert van Valkenhoef
> Assignee: Andy Seaborne
> Labels: easyfix
> Fix For: Jena 2.12.2
>
>
> While unit testing an implementation of the DatasetGraph interface I ran in
> to this bug in DatasetGraphCollection:
> {code}
> @Test public void test() {
> DatasetGraph mem = DatasetGraphFactory.createMem();
> DatasetGraph ds = DatasetGraphFactory.create(mem);
> ds.contains(NodeFactory.createURI("http://example.com/DoesNotExist";),
> NodeFactory.createURI("http://example.com/subject";),
> NodeFactory.createURI("http://example.com/predicate";),
> NodeFactory.createURI("http://example.com/object";));
> }
> {code}
> This throws:
> {code}
> java.lang.NullPointerException
> at
> com.hp.hpl.jena.sparql.core.DatasetGraphCollection.findInSpecificNamedGraph(DatasetGraphCollection.java:66)
> at
> com.hp.hpl.jena.sparql.core.DatasetGraphCollection.findInSpecificNamedGraph(DatasetGraphCollection.java:34)
> at
> com.hp.hpl.jena.sparql.core.DatasetGraphBaseFind.findNG(DatasetGraphBaseFind.java:59)
> at
> com.hp.hpl.jena.sparql.core.DatasetGraphBaseFind.find(DatasetGraphBaseFind.java:48)
> at
> com.hp.hpl.jena.sparql.core.DatasetGraphBase.contains(DatasetGraphBase.java:131)
> at
> .....
> {code}
> It seems that the null check in findInSpecificNamedGraph is checking the
> wrong variable (it checks g == null but shoud check graph == null).
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