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https://issues.apache.org/jira/browse/JENA-2193?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17439228#comment-17439228
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Henry Kuijpers commented on JENA-2193:
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I'm sorry, I wanted to do this yesterday, but I got involved in other things.
Here is a minimal use-case:
{code:java}
ModelFactory.createDefaultModel().read(new ByteArrayInputStream(("<rdf:RDF
xmlns:dcterms=\"http://purl.org/dc/terms/\";
xmlns:nbc=\"http://data.bibliotheek.nl/ns/nbc#\";
xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\";
xmlns:rdfs=\"http://www.w3.org/2000/01/rdf-schema#\";>\n" + "
<rdf:Description rdf:about=\"http://data.bibliotheek.nl/ggc/ppn/425871568\";>\n"
+ " <dcterms:isPartOf>\n" + " <rdf:Description>\n" +
" <rdfs:label>Foeksia de miniheks</rdfs:label>\n" + "
<dcterms:isFormatOf
rdf:resource=\"http://data.bibliotheek.nl/ggc/ppn/352103043\"; />\n" + "
</rdf:Description>\n" + " </dcterms:isPartOf>\n" + "
</rdf:Description>\n" + " <rdf:Description
rdf:about=\"http://data.bibliotheek.nl/ggc/ppn/425871568\";>\n" + "
<nbc:isPartOf nbc:source=\"ggc\" nbc:type=\"serie\"
nbc:identifier=\"PPN:352103043\">\n" + " <nbc:title>Foeksia de
miniheks</nbc:title>\n" + " </nbc:isPartOf>\n" + "
</rdf:Description>\n" + "</rdf:RDF>").getBytes(StandardCharsets.UTF_8)),
null);
{code}
> XMLHandler#endElement can throw NPE
> -----------------------------------
>
> Key: JENA-2193
> URL: https://issues.apache.org/jira/browse/JENA-2193
> Project: Apache Jena
> Issue Type: Improvement
> Reporter: Henry Kuijpers
> Priority: Major
>
> In our case:
> {code:java}
> package org.apache.jena.rdfxml.xmlinput.impl;
> public class XMLHandler extends ... {
> public void endElement(String uri, String localName, String rawName)
> throws SAXException {
> this.frame.endElement();
> this.frame = this.frame.getParent();
> this.frame.afterChild();
> }
> }
> {code}
> The result of getParent was null, which triggered a NullPointerException.
> However, maybe the issue is one of the upper layers (I'm not too familiar
> with all the internals of JENA/RDF and I also don't see any nullability
> annotations)?
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