How to read all object properties from Ontology in Java using Jena library?

Question

I want to read all the Object Properties present in the OWL file. I have created that OWL file using Protege tool. I have loaded the model also but I am not able to fetch the object properties.

For Example: if I have a class in Ontology named as Car and which has several Object and Data properties linked to it, such as hasColor, hasAudioSystem,hasGps.

I want to get all the object properties linked with that particular class through Domain and Range or only through the name of the class. Please help..

Answer 1

If you want to get the list of object properties having a type declared as domain or range, one way of doing it with Jena is the following:

public void objectPropertiesForType(Model m, final Resource type) {
    StmtIterator i = m.listStatements(new SimpleSelector() {
        @Override
        public boolean test(Statement s) {
            if (s.getPredicate().equals(RDFS.domain)
                    || s.getPredicate().equals(RDFS.range)) {
                return (s.getObject().equals(type));
            }
            return false;
        }
    });
    while (i.hasNext()) {
        Statement s = i.next();
        System.out.println("Property: " + s.getSubject().getURI());
    }
}