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https://issues.apache.org/jira/browse/JENA-468?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13681516#comment-13681516
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Andy Seaborne commented on JENA-468:
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I have protected the i.close call but I still think this can only happen when
an unrelated exception occurs in listRDFTypes. At least now the exception will
not be lost to the NPE.
> NullPointerException when calling getRDFType()
> ----------------------------------------------
>
> Key: JENA-468
> URL: https://issues.apache.org/jira/browse/JENA-468
> Project: Apache Jena
> Issue Type: Bug
> Components: Onotology API
> Affects Versions: Jena 2.10.1
> Reporter: Sriram Gopalan
> Attachments: data.ttl
>
>
> When I run the following code snippet after having loaded the attached ttl
> file, I get a NullPointerException @
> com.hp.hpl.jena.ontology.impl.OntResourceImpl#getRDFType(boolean direct) -
> Line 833
> {noformat}
> Resource bob = model.getResource("http://example.org/bob";);
> OntResource ontBob = bob.as(OntResource.class);
> ontBob.getRDFType()
> {noformat}
> Upon inspection, it appears as though the code is not checking to see if the
> iterator is null, before calling the close() method
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