Lorenz Bühmann created JENA-1232:
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Summary: Node toString() method doesn't take into account the
prefix mapping for literals
Key: JENA-1232
URL: https://issues.apache.org/jira/browse/JENA-1232
Project: Apache Jena
Issue Type: Bug
Components: Base
Affects Versions: Jena 3.1.0
Reporter: Lorenz Bühmann
Priority: Trivial
Hi,
not sure whether this is really a (very minor) bug or just a decision by
design, but what I discovered during using the graph layer of Jena was the
following:
The class org.apache.jena.graph.Node provides some toString() methods, among
others, one which allows to add a PrefixMapping as argument
This is then taken into account for rendering the object, e.g. to provide a
prefixed form of a URI. But I have recognized now that this doesn't work for
literals, e.g.
"1"^^<http://www.w3.org/2001/XMLSchema#int>
is never shortened to
"1"^^xsd:int
When looking into the code, I saw that in the class
org.apache.jena.graph.Node_Literal the prefix mapping is just ignored then [1],
probably because it's delegated to a method of the class LiteralLabel which
doesn't seem to have any method that uses prefix mappings.
I know that this basically affects the core API, so probably this wasn't
designed for 3rd party use and extensions - in that case, simply close this
issue and I will continue with my current workaround.
[1]
https://github.com/apache/jena/blob/master/jena-core/src/main/java/org/apache/jena/graph/Node_Literal.java#L67
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