Java OntModel.listStatements方法代碼示例

import com.hp.hpl.jena.ontology.OntModel; //導入方法依賴的package包/類
@Test
public void test() {

	// create an empty ontology model using Pellet spec
	final OntModel model = ModelFactory
			.createOntologyModel(InferrayReasonerFactory.INFERRAY_RDFSPLUS);
	// final OntModel model = ModelFactory
	// .createOntologyModel(OntModelSpec.RDFS_MEM_TRANS_INF);
	// read the file

	try {
		final long t1 = System.currentTimeMillis();
		final InputStream is = new FileInputStream(input);
		// model.read(is, null);// , "N-TRIPLES"
		// List the countries
		final StmtIterator it = model.listStatements();
		final Set<com.hp.hpl.jena.rdf.model.Statement> set = it.toSet();
		System.out.println((System.currentTimeMillis() - t1) + "ms");
		System.out.println(set.size());

	} catch (final FileNotFoundException e) {
		e.printStackTrace();
		return;
	}

}
 

import com.hp.hpl.jena.ontology.OntModel; //導入方法依賴的package包/類
private boolean checkRangeForMatch(OntModel theJenaModel2, OntProperty pred, OntResource obj, boolean isList) throws CircularDependencyException {
		StmtIterator rngitr = theJenaModel2.listStatements(pred, RDFS.range, (RDFNode)null);
		while (rngitr.hasNext()) {
			RDFNode rng = rngitr.nextStatement().getObject();
			if (isTypedListSubclass(rng)) {
				if (!isList) {
					rngitr.close();
					return false;
				}
				if (rng.canAs(OntClass.class )) {
					rng = getSadlTypedListType(rng.as(OntClass.class));
				}
				else {
// TODO this is an unhandled case					
				}
			}
			if (obj instanceof Individual) {
				ExtendedIterator<Resource> institr = obj.asIndividual().listRDFTypes(true);
				while (institr.hasNext()) {
					Resource typ = institr.next();
					if (rng.canAs(OntClass.class)) {
						if (SadlUtils.classIsSubclassOf(typ.as(OntClass.class), rng.asResource().as(OntClass.class), true, null)) {
							institr.close();
							rngitr.close();
							return true;
						}
					}
				}
			}
			else if (obj.canAs(OntClass.class) && rng.isResource() && rng.asResource().canAs(OntClass.class)) {
				if (SadlUtils.classIsSubclassOf(obj.as(OntClass.class), rng.asResource().as(OntClass.class), true, null)) {
					rngitr.close();
					return true;
				}
			}
		}
		return false;
	}
 

import com.hp.hpl.jena.ontology.OntModel; //導入方法依賴的package包/類
/**
 * This method detects if the loaded knowledge has some city information and calls to external
 * Ontologies to link their data with the loaded knowledge.
 *
 * @param pFinalResult: The loaded and inferred knowledge.
 */
private void updateCityInformation(OntModel pFinalResult) {
    // Defining the list of target cities to obtain desired information
    final List<String> places = Arrays.asList("lecce", "singapore", "madrid", "birmingham", "montpellier", "athens",
            "LECCE", "SINGAPORE", "MADRID", "BIRMINGHAM", "MONTPELLIER", "ATHENS");
    // Iterate loaded statements of the model.
    StmtIterator iter = pFinalResult.listStatements();
    try {
        while (iter.hasNext()) {
            Statement stmt = iter.next();
            // Obtain the data from resources
            Resource s = stmt.getSubject();
            Property p = stmt.getPredicate();
            RDFNode o = stmt.getObject();

            // Prepare some values for evaluations
            String sURI = new String();
            String pURI = new String();
            String oURI = new String();

            // Assing the values of the current statement
            if (s.isURIResource()) {
                // We get the URI
                sURI = s.getURI();
            } else if (s.isAnon()) {
                System.out.print("blank");
            }
            if (p.isURIResource())
                // We get the URI.
                pURI = p.getURI();
            if (o.isURIResource()) {
                // We get the URI
                oURI = o.asResource().getURI();
            } else if (o.isAnon()) {
                System.out.print("blank");
            } else if (o.isLiteral()) {
                oURI = o.asLiteral().getString();           // Getting the literal value (city name)
            }

            // baseuri:pilot:pilot_name/23232  hasPilotname "lecce";


            // SUJETO
            // baseURI + /city4age_ar/pilot/*
            // base URI /city4age_sr/pilot/*

            // Predicado
            // dbp:name

            // Objeto
            // Literal que sea una lista de ciudades

            if (sURI.equals(c4aBaseURI+"Pilot") && pURI.equals("dbp:name") && oURI.toLowerCase().equals(places)) {
                LOGGER.info("--> updateCityInformation: Searching information from city: "+oURI.toLowerCase());
                // Obtaining aditional resources of external ontologies
                this.obtainCityInformation(oURI.toLowerCase(), pFinalResult);
            }
        }
    }catch (Exception e) {
        // We are goingi to raise the default exception. It can be raised from the method obtainCityInformation
        LOGGER.severe("--> updateCityInformation: An error happened when trying to update city information: ");
        System.err.println("--> updateCityInformation: An error happened when trying to update city information: ");
        e.printStackTrace();
    } finally {
        if (iter != null) iter.close();
    }
}