[jira] [Created] (JENA-1026) listIndividuals performance issue

["Stian Soiland-Reyes (JIRA)" <ji...@apache.org>]

Stian Soiland-Reyes created JENA-1026:
-----------------------------------------

             Summary: listIndividuals performance issue
                 Key: JENA-1026
                 URL: https://issues.apache.org/jira/browse/JENA-1026
             Project: Apache Jena
          Issue Type: Bug
          Components: Ontology API
    Affects Versions: Jena 3.0.0
         Environment: Verified on Jena 3.0.1-SNAPSHOT (2015-09-13) w/ Ubuntu 14.04/x64, 4 cores i7-3520M, 16G ram, SSD disk, Open JDK 1.8.0_45-internal
            Reporter: Stian Soiland-Reyes
            Priority: Minor
         Attachments: OntologiaDeAlimentos.owl

As reported by Maria Clementina Latanzi on dev@jena 2015-09-12:

{quote}

I'm working with Jena. I have an ontology with no more than 50 individuals,
and I use Jena to
get individuals from Ontology by calling *listIndividual* (
*com.hp.hpl.jena.ontology.OntModel.listIndividuals*). When I call this
method, it's taking a lot of time up to 20 seconds. When debugging, it
takes more than 1 minute to return. Other methods like *listClass *return
instantly.
{quote}

{code}
package testOnto;

import java.io.InputStream;

import java.util.ArrayList;

import java.util.Iterator;

import com.hp.hpl.jena.ontology.Individual;

import com.hp.hpl.jena.ontology.OntClass;

import com.hp.hpl.jena.ontology.OntModel;

import com.hp.hpl.jena.rdf.model.ModelFactory;

import com.hp.hpl.jena.rdf.model.Resource;

import com.hp.hpl.jena.rdf.model.Property;

import com.hp.hpl.jena.rdf.model.StmtIterator;

import com.hp.hpl.jena.rdf.model.impl.StatementImpl;

import com.hp.hpl.jena.shared.JenaException;

import com.hp.hpl.jena.util.FileManager;

import com.hp.hpl.jena.util.iterator.ExtendedIterator;

public class onto {

	static String Ontofile =
"C:/Users/Sig/Clemen/OntologiasArchivos/OntologiaIngesta.owl";

	public static void main(String[] args) {

		//crea ontologia

		OntModel m = ModelFactory.createOntologyModel();

		try {

			InputStream in =
FileManager.get().open("C:/Users/Sig/Clemen/OntologiasArchivos/OntologiaDeAlimentos.owl");

            if (in ==null) {

            	System.out.println("ERROR abriendo archivo" + Ontofile);

            	return;

            	}

            else {  m.read(in, "RDF/XML");

               	System.out.println("archivo" + Ontofile + "leido
exitosamente" );

            	}

        } catch (JenaException je) {

        	System.out.println("ERROR leyendo archivo" + je.getMessage());

            je.printStackTrace();

            System.exit(0);

        }

				long startMilC = System.currentTimeMillis();

        System.out.println("Start list classes: " + startMilC);

        ExtendedIterator classes = m.listClasses();

        long endMilC = System.currentTimeMillis();

        System.out.println("Duration ListIndividuals: " + (endMilC -
startMilC));

            long startMil = System.currentTimeMillis();

        System.out.println("Start ListIndividuals: " + startMil);

        ExtendedIterator individuos = m.listIndividuals();

                 long endMil = System.currentTimeMillis();

        System.out.println("Duration ListIndividuals: " + (endMil -
startMil));

	}

}
{code}


See attached ontology and test case.

Verified against current 3.0.1-SNAPSHOT.



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