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Posted to dev@jena.apache.org by "Andy Seaborne (Jira)" <ji...@apache.org> on 2022/02/27 13:25:00 UTC
[jira] [Commented] (JENA-2293) SPARQL Update: DatasetGraphOne: NPE when COPY or MOVE to named graph
[ https://issues.apache.org/jira/browse/JENA-2293?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17498590#comment-17498590 ]
Andy Seaborne commented on JENA-2293:
-------------------------------------
The original title:
"SPARQL Update: NPE when COPY or MOVE to non-existing graph"
changed to
"SPARQL Update: DatasetGraphOne: NPE when COPY or MOVE to named graph"
To anyone reading this:
This is specific to {{DatasetGraphOne}} and its javadoc states that named graph can not be added.
"CREATE" will fail with an UnsupportedOperationException on {{DatasetGraphOne}}.
A dataset created with {{DatasetFactory.create(graph)} works and does automatically create graphs as needed.
> SPARQL Update: DatasetGraphOne: NPE when COPY or MOVE to named graph
> --------------------------------------------------------------------
>
> Key: JENA-2293
> URL: https://issues.apache.org/jira/browse/JENA-2293
> Project: Apache Jena
> Issue Type: Bug
> Affects Versions: Jena 4.4.0
> Reporter: Richard Cyganiak
> Assignee: Andy Seaborne
> Priority: Major
> Attachments: SPARQLUpdateTest.java
>
>
> When executing SPARQL Update requests against a dataset that does not automatically create new graphs, COPY or MOVE operations with a non-existing graph as the target will result in a NullPointerException. The same happens when adding SILENT.
> I would expect these requests to result in UpdateExceptions, with a message pointing out the non-existing graph. Or nothing in the case of SILENT.
> The attached JUnit 4 test demonstrates this by running queries against a DatasetGraphOne:
> COPY DEFAULT TO <http://example.org/no-such-graph>
> COPY SILENT DEFAULT TO <http://example.org/no-such-graph>
> MOVE DEFAULT TO <http://example.org/no-such-graph>
> MOVE SILENT DEFAULT TO <http://example.org/no-such-graph>
> Each request produces an NPE.
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