commons-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (COMMONSRDF-55) Stream of Jena quads use wrong IRI for default graph
Date Wed, 01 Feb 2017 15:07:51 GMT

    [ https://issues.apache.org/jira/browse/COMMONSRDF-55?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15848470#comment-15848470
] 

ASF GitHub Bot commented on COMMONSRDF-55:
------------------------------------------

Github user stain commented on the issue:

    https://github.com/apache/commons-rdf/pull/32
  
    Any comments from perhaps @afs or @ajs6f? I'm not sure exactly at what boundary we should
replace `<urn:x-arq:DefaultGraph>` and friends with `Optional.empty()` -- in the solution
of this PR it happens for any Quad created with `JenaRDF` - but of course that would not happen
in other `RDF` instances. This suggestion would also convert any "foreign" `IRI` instances
of `<urn:x-arq:DefaultGraph>` when given as a graph name.
    
    I'll admit there's potential for information loss if the alternate  `<urn:x-arq:DefaultGraphNode>`
is used as a string IRI or Node when making a Commons RDF Quad  - this PR will adapt it into
`<urn:x-arq:DefaultGraph> when later making the Jena `Quad` instance from the field
of Optional.empty(), however Jena's `DatasetGraph` also does that conversion.



> Stream of Jena quads use wrong IRI for default graph
> ----------------------------------------------------
>
>                 Key: COMMONSRDF-55
>                 URL: https://issues.apache.org/jira/browse/COMMONSRDF-55
>             Project: Apache Commons RDF
>          Issue Type: Bug
>          Components: jena
>    Affects Versions: 0.3.0
>            Reporter: Stian Soiland-Reyes
>            Assignee: Stian Soiland-Reyes
>             Fix For: 1.0.0
>
>
> See https://travis-ci.org/apache/commons-rdf/builds/195548479
> {code}
> org.apache.commons.rdf.jena.DatasetJenaTest
> streamLanguageTagsCaseInsensitive(org.apache.commons.rdf.jena.DatasetJenaTest)  Time
elapsed: 0.012 sec  <<< FAILURE!
> java.lang.AssertionError: expected:<<http://example.com/s1> <http://example.com/greeting>
"Hello"@EN-GB <urn:x-arq:DefaultGraph>.> but was:<<http://example.com/s1>
<http://example.com/greeting> "Hello"@en-GB .>
> {code}
> Jena uses the IRI `<urn:x-arq:DefaultGraph>` internally to represent the default
graph within datasets - we need to recognize that on the way out of a `JenaDatasetImpl.stream()`
and possibly in the `asQuad(JenaQuad)` converter and replace it with `Optional.empty()` so
the default graph appears the same across implementations.
> The `AbstractDatasetTest`  should be augmented to do more tests on the default graph,
including `.stream()`, `.iterate()`, `.contains()` and `.remove()`1.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)

Mime
View raw message