[JENA-2075] Seq "set" and "add" methods yield different results. - ASF JIRA

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Details

Type: Bug
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: Jena 3.17.0
Fix Version/s: Jena 4.0.0
Component/s: Core
Labels:
None

Description

I think the issue is in the Seq.set() method but the if the example below is executed the results are variously boolean values or strings representing boolean values.

Code:

import org.apache.jena.rdf.model.Model;
import org.apache.jena.rdf.model.ModelFactory;
import org.apache.jena.rdf.model.Seq;

public class SeqTest {    
    public static void main(String[] args) {
        Model m = ModelFactory.createDefaultModel();
        Seq seq = m.createSeq();
        seq.add( 1L );
        seq.add(2, 2L );
        m.write(System.out, "TURTLE");
        seq.set(1, 1L);
        m.write(System.out, "TURTLE");
    }
}

Result:

[ a       <http://www.w3.org/1999/02/22-rdf-syntax-ns#Seq> ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#_1>
          "1" ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#_2>
          "2"
] .
[ a       <http://www.w3.org/1999/02/22-rdf-syntax-ns#Seq> ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#_1>
          "1"^^<http://www.w3.org/2001/XMLSchema#long> ;
  <http://www.w3.org/1999/02/22-rdf-syntax-ns#_2>
          "2"
] .

The Collection.add() code and the Seq.add() methods both insert string representations for the long values. The Seq.set() method on the other hand places a typed literal in the graph.

Personally I would rather see the typed literal but I don't know that the standard says.