benlammel opened a new issue, #2270:
URL: https://github.com/apache/jena/issues/2270
### Version
4.10.0
### What happened?
I just came across the following unexpected behavior.
There seems to be a difference of adding a literal of data type UUID (1)
using .toString() or (2) blank.
(1) `NodeFactory.createLiteralByValue(id.toString(), XSDDatatype.XSDstring)`
(2) `NodeFactory.createLiteralByValue(id, XSDDatatype.XSDstring)`
The model output after update does not show any visible difference but when
querying using the id won't return results.
Demonstrating example below. Any explanation or comments appreciated.
`public class JenaUUID {
private Model model;
private final String UUIDPrefix = "urn:uuid:";
private Property idProperty;
public JenaUUID() {
model = ModelFactory.createDefaultModel();
idProperty = model.createProperty("data:hasUUID");
System.out.println("case 1: id as string");
UUID idC1 = UUID.randomUUID();
UpdateBuilder ubC1 = new UpdateBuilder();
ubC1.addInsert(NodeFactory.createURI(UUIDPrefix + idC1),
RDF.type, RDFS.Class);
ubC1.addInsert(NodeFactory.createURI(UUIDPrefix + idC1),
idProperty, NodeFactory.createLiteralByValue(idC1.toString(),
XSDDatatype.XSDstring));
addAndQuery(idC1, ubC1);
System.out.println("case 2: id as UUID");
UUID idC2 = UUID.randomUUID();
UpdateBuilder ubC2 = new UpdateBuilder();
ubC2.addInsert(NodeFactory.createURI(UUIDPrefix + idC2),
RDF.type, RDFS.Class);
ubC2.addInsert(NodeFactory.createURI(UUIDPrefix + idC2),
idProperty, NodeFactory.createLiteralByValue(idC2, XSDDatatype.XSDstring));
addAndQuery(idC2, ubC2);
}
private void addAndQuery(UUID id, UpdateBuilder ub) {
ub.addInsert(NodeFactory.createURI(UUIDPrefix + id), RDF.type,
RDFS.Class);
ub.addInsert(NodeFactory.createURI(UUIDPrefix + id),
idProperty, NodeFactory.createLiteralByValue(id.toString(),
XSDDatatype.XSDstring));
UpdateAction.execute(ub.buildRequest(), model);
System.out.println("after update");
RDFDataMgr.write(System.out, model, RDFFormat.TURTLE);
SelectBuilder sb = new SelectBuilder();
sb.addVar("iri");
sb.addVar("id");
sb.addBind("\"" + id + "\"", "id");
sb.addWhere(NodeFactory.createVariable("iri"), RDF.type,
NodeFactory.createVariable("type"));
sb.addWhere(NodeFactory.createVariable("iri"), idProperty,
NodeFactory.createVariable("id"));
System.out.println("query: " +sb.build());
QueryExecution queryExecution =
QueryExecutionFactory.create(sb.build(), this.model);
ResultSet queryResults = queryExecution.execSelect();
ResultSetFormatter.out(System.out, queryResults, sb.build());
System.out.println(" -------- END --------");
}
public static void main(String[] args) {
new JenaUUID();
}
}
`
Runtime
java --version
openjdk 21.0.2 2024-01-16 LTS
OpenJDK Runtime Environment Temurin-21.0.2+13 (build 21.0.2+13-LTS)
OpenJDK 64-Bit Server VM Temurin-21.0.2+13 (build 21.0.2+13-LTS, mixed mode)
### Relevant output and stacktrace
```shell
case 1: id as string
after update
<urn:uuid:13e680a2-b118-436b-b84d-27b73b42dd37>
a <http://www.w3.org/2000/01/rdf-schema#Class>;
<data:hasUUID> "13e680a2-b118-436b-b84d-27b73b42dd37" .
query: SELECT ?iri ?id
WHERE
{ BIND("13e680a2-b118-436b-b84d-27b73b42dd37" AS ?id)
?iri a ?type ;
<data:hasUUID> ?id
}
--------------------------------------------------------------------------------------------
| iri | id
|
============================================================================================
| <urn:uuid:13e680a2-b118-436b-b84d-27b73b42dd37> |
"13e680a2-b118-436b-b84d-27b73b42dd37" |
--------------------------------------------------------------------------------------------
-------- END --------
case 2: id as UUID
after update
<urn:uuid:e5343c35-e527-4bca-93c1-4a3d08812cbd>
a <http://www.w3.org/2000/01/rdf-schema#Class>;
<data:hasUUID> "e5343c35-e527-4bca-93c1-4a3d08812cbd" .
<urn:uuid:13e680a2-b118-436b-b84d-27b73b42dd37>
a <http://www.w3.org/2000/01/rdf-schema#Class>;
<data:hasUUID> "13e680a2-b118-436b-b84d-27b73b42dd37" .
query: SELECT ?iri ?id
WHERE
{ BIND("e5343c35-e527-4bca-93c1-4a3d08812cbd" AS ?id)
?iri a ?type ;
<data:hasUUID> ?id
}
------------
| iri | id |
============
------------
-------- END --------
```
### Are you interested in making a pull request?
Maybe
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