İşte benim çözümüm. Sadece sormak dizeleri çıktısı ettik ama umarım ilgilendiğiniz şeyleri bir ontoloji grafiğini çapraz ve dışarı almak için Jena OntAPI nasıl kullanılacağı bu görebilirsiniz.
package examples;
import java.util.Iterator;
import com.hp.hpl.jena.ontology.*;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.rdf.model.Resource;
public class PizzaExample
{
/***********************************/
/* Constants */
/***********************************/
public static String BASE = "http://www.co-ode.org/ontologies/pizza/pizza.owl";
public static String NS = BASE + "#";
/***********************************/
/* External signature methods */
/***********************************/
public static void main(String[] args) {
new PizzaExample().run();
}
public void run() {
OntModel m = getPizzaOntology();
OntClass american = m.getOntClass(NS + "American");
for (Iterator<OntClass> supers = american.listSuperClasses(); supers.hasNext();) {
displayType(supers.next());
}
}
/***********************************/
/* Internal implementation methods */
/***********************************/
protected OntModel getPizzaOntology() {
OntModel m = ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM);
m.read(BASE);
return m;
}
protected void displayType(OntClass sup) {
if (sup.isRestriction()) {
displayRestriction(sup.asRestriction());
}
}
protected void displayRestriction(Restriction sup) {
if (sup.isAllValuesFromRestriction()) {
displayRestriction("all", sup.getOnProperty(), sup.asAllValuesFromRestriction().getAllValuesFrom());
}
else if (sup.isSomeValuesFromRestriction()) {
displayRestriction("some", sup.getOnProperty(), sup.asSomeValuesFromRestriction().getSomeValuesFrom());
}
}
protected void displayRestriction(String qualifier, OntProperty onP, Resource constraint) {
String out = String.format("%s %s %s",
qualifier, renderURI(onP), renderConstraint(constraint));
System.out.println("american pizza: " + out);
}
protected Object renderConstraint(Resource constraint) {
if (constraint.canAs(UnionClass.class)) {
UnionClass uc = constraint.as(UnionClass.class);
// this would be so much easier in ruby ...
String r = "union{ ";
for (Iterator<? extends OntClass> i = uc.listOperands(); i.hasNext();) {
r = r + " " + renderURI(i.next());
}
return r + "}";
}
else {
return renderURI(constraint);
}
}
protected Object renderURI(Resource onP) {
String qName = onP.getModel().qnameFor(onP.getURI());
return qName == null ? onP.getLocalName() : qName;
}
}
üretir Hangi aşağıdaki çıkışı: (Apache-jena 3.xx ile) Şimdi
american pizza: some pizza:hasTopping pizza:MozzarellaTopping
american pizza: some pizza:hasTopping pizza:PeperoniSausageTopping
american pizza: some pizza:hasTopping pizza:TomatoTopping
american pizza: all pizza:hasTopping union{ pizza:MozzarellaTopping pizza:TomatoTopping pizza:PeperoniSausageTopping}