[jira] [Created] (JENA-1135) Cannot query named graph in in-memory dataset

[Todd Schiller (JIRA)]

Todd Schiller created JENA-1135:
-----------------------------------

             Summary: Cannot query named graph in in-memory dataset
                 Key: JENA-1135
                 URL: https://issues.apache.org/jira/browse/JENA-1135
             Project: Apache Jena
          Issue Type: Bug
          Components: ARQ, Jena
    Affects Versions: Jena 3.0.1
            Reporter: Todd Schiller


I'm trying query an in-memory named graph with SPARQL. Any ideas why the 
following would be returning no results? 

import org.apache.jena.query.*;
import org.apache.jena.rdf.model.*;
import org.apache.jena.vocabulary.RDFS;

public class GraphTest {
    public static void main(String [] args) {
        Dataset data = DatasetFactory.create();

        Model model = ModelFactory.createDefaultModel();
        model.getResource("urn:foo").addLiteral(RDFS.label, "foobar");
        data.addNamedModel("urn:graph", model);

        String sparql = "SELECT ?s ?p ?o FROM <urn:graph> WHERE { ?s ?p ?o }";
        ResultSet results = QueryExecutionFactory.create(sparql, 
data).execSelect();
        int cnt = 0;
        while (results.hasNext()) {
            cnt++;
            results.next();
        }
         
        // should both print 1
        System.out.println("# results: " + cnt); // prints 0
        System.out.println("Model size: " + 
data.getNamedModel("urn:graph").size()); // prints 1
    }
}




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