Java Model類代碼示例

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
public static void main(String[] args) {

    if (args.length != 3) {
      System.err.println("Wrong arguments");
      showUsage();
    }
    System.out.println("Model file   : " + args[0]);
    System.out.println("Model URI    : " + args[1]);
    System.out.println("Model tdb dir: " + args[2]);

    Dataset dataset = TDBFactory.createDataset(args[2]);
    try {
      Model model = dataset.getNamedModel(args[1]);
      TDBLoader.loadModel(model, args[0]);
    } finally {
      dataset.close();
    }
  }
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
/**
 * Creates a new object.
 *
 * This originally used application/octet-stream;qs=1001 as a workaround
 * for JERSEY-2636, to ensure requests without a Content-Type get routed here.
 * This qs value does not parse with newer versions of Jersey, as qs values
 * must be between 0 and 1.  We use qs=1.000 to mark where this historical
 * anomaly had been.
 *
 * @param contentDisposition the content Disposition value
 * @param requestContentType the request content type
 * @param slug the slug value
 * @param requestBodyStream  the request body stream
 * @param link the link value
 * @param digest the digest header
 * @return 201
 * @throws InvalidChecksumException if invalid checksum exception occurred
 * @throws IOException if IO exception occurred
 * @throws MalformedRdfException if malformed rdf exception occurred
 */
@POST
@Consumes({MediaType.APPLICATION_OCTET_STREAM + ";qs=1.000", WILDCARD})
@Produces({TURTLE_WITH_CHARSET + ";qs=1.0", JSON_LD + ";qs=0.8",
        N3_WITH_CHARSET, N3_ALT2_WITH_CHARSET, RDF_XML, NTRIPLES, TEXT_PLAIN_WITH_CHARSET,
        TURTLE_X, TEXT_HTML_WITH_CHARSET, "*/*"})
public Response createObject(@HeaderParam(CONTENT_DISPOSITION) final ContentDisposition contentDisposition,
                             @HeaderParam(CONTENT_TYPE) final MediaType requestContentType,
                             @HeaderParam("Slug") final String slug,
                             @ContentLocation final InputStream requestBodyStream,
                             @HeaderParam(LINK) final String link,
                             @HeaderParam("Digest") final String digest)
        throws InvalidChecksumException, IOException, MalformedRdfException {
    LOGGER.info("POST: {}", externalPath);

    final ContainerService containerService = getContainerService();
    final URI resourceUri = createFromPath(externalPath);

    //check that resource exists
    if (!containerService.exists(resourceUri)) {
        if (!isRoot(resourceUri)) {
            return status(NOT_FOUND).build();
        } else {
            createRoot();
        }
    }

    final String newResourceName = slug == null ? UUID.randomUUID().toString() : slug;
    final String resourcePath = (isRoot(resourceUri) ? "" : resourceUri.getPath());
    final URI newResourceUri = createFromPath(resourcePath + "/" + newResourceName);
    final Container container = containerService.findOrCreate(newResourceUri);
    final Model model = ModelFactory.createDefaultModel();

    model.read(requestBodyStream, container.getIdentifier().toString(), "TTL");
    final Stream<Triple> triples = model.listStatements().toList().stream().map(Statement::asTriple);
    container.updateTriples(triples);
    return created(toExternalURI(container.getIdentifier(), headers)).build();
}
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
public static int getCount(String q, Model m) {
    Query query = QueryFactory.create(q);
    QueryExecution queryExec = QueryExecutionFactory.create(query, m);
    ResultSet rs = queryExec.execSelect();
    String vName = "";
    for (String v: rs.getResultVars()) {
        if (v.contains("count")) {
            vName = v;
            break;
        }
    }
    
    while (rs.hasNext()) {
        QuerySolution s = rs.nextSolution();
        Literal c = s.getLiteral(vName);
        queryExec.close();
        return c.getInt();
    }   
    queryExec.close();
    return 0;
}
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
/**
 * This method converts a string (in n-triples format) into a Jena triple
 *
 * @param string containing single n-triples triple
 * @return Triple
 */
public static Triple toTriple(final String string) {
    // Create Jena model
    Model inputModel = createDefaultModel();
    try {
        // Load model with arg string (expecting n-triples)
        inputModel = inputModel.read(new StringInputStream(string), null, strLangNTriples);
    } catch (UnsupportedEncodingException e) {
        throw new RuntimeException(e);
    }

    // Since there is only one statement, get it
    final Statement stmt = inputModel.listStatements().nextStatement();

    // Return the Jena triple which the statement represents
    return stmt.asTriple();
}
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
@Override
protected Model createModel(String dbId) {
    File ntriplesFile = getNTriplesPath(dbId).toFile();
    if (!ntriplesFile.exists()) {
        logger.warn(marker, "Can't find NT file {}", ntriplesFile);
    } else {

        try (InputStream is = new FileInputStream(ntriplesFile)) {
            Model model = ModelFactory.createDefaultModel();
            model.read(is, null, "N-TRIPLES");
            return model;
        } catch (Exception e) {
            throw new StarGraphException(e);
        }
    }

    return null;
}
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
public static void main(String[] args) throws IOException {
PropertyConfigurator.configure("log4j.info");
BufferedReader reader = new BufferedReader(new FileReader(args[0]));
FileOutputStream out = new FileOutputStream(new File("/usr/local/RAID/geonames.nt"));
String buffer = null;
int count = 0;

while ((buffer = reader.readLine()) != null) {
    if (++count % 2 == 0) {
	logger.debug("processing xml: " + buffer);
	Model model = ModelFactory.createDefaultModel() ;
	model.read(new StringReader(buffer), null, "RDF/XML");
	model.write(out, "N-TRIPLE");
    } else {
	logger.info("skipping: " + buffer);
    }
}
reader.close();
   }
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
/**
  * Fetch a model from Ontology Editor, load and return as TDB-backed Jena model.
  *
  * @param endpoint
  * @param tDbDirectoryPath
  * @return
* @throws OEConnectionException 
* @throws IOException 
  */
 public static Model loadOEModelToTdb(OEModelEndpoint endpoint, String tDbDirectoryPath) throws IOException, OEConnectionException {
   Preconditions.checkNotNull(endpoint);
   Preconditions.checkArgument(!Strings.isNullOrEmpty(tDbDirectoryPath));

   if (logger.isDebugEnabled()) {
     logger.debug("OEModelEndpoint: {}", endpoint);
     logger.debug("TDB Dir path   : {}", tDbDirectoryPath);
   }

   String modelAsTTL = endpoint.fetchData();

   Dataset dataset = TDBFactory.createDataset(tDbDirectoryPath);
   Model model = dataset.getNamedModel(endpoint.modelIri);
   model.read(new ByteArrayInputStream(modelAsTTL.getBytes()), "TTL");
   return model;
 }
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
@Test
public void testConceptGroupedDiff() throws IOException {

  Model model2 = hydrateAndModifySecondModel();

  List<Property> chaseProperties = Lists.newArrayList();
  chaseProperties.add(SKOSXL.prefLabel);
  chaseProperties.add(SKOSXL.altLabel);
  Collection<RDFSubjectDifference> diffs = RDFDifferenceBuilder.buildSubjectBatches(
      RDFDifferenceBuilder.buildDifference(model, model2), chaseProperties);

  for (RDFSubjectDifference subjDiff : diffs) {
    String sparql = DiffToSparqlInsertUpdateBuilder.buildSparqlInsertUpdate(subjDiff);
    System.out.println("Batch for subject: " + subjDiff.subject.toString());
    System.out.println(sparql);
  }
}
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
@Test
public void testBsbmEmbedded() {

    SerializerModel serializer = new SerializerModel();
    Generator.init(new String[] {});
    Generator.setSerializer(serializer);
    Generator.run();
    TestDriverParams testDriverParams = Generator.getTestDriverParams();
    
    Model model = serializer.getModel();

    QueryExecutionFactory qef = FluentQueryExecutionFactory.from(model).create();

    TestDriver testDriver = new TestDriver();
    testDriver.processProgramParameters(new String[]{"http://example.org/foobar/sparql", "-w", "0", "-runs", "1"});
    testDriver.setParameterPool(new LocalSPARQLParameterPool(testDriverParams, testDriver.getSeed()));
    testDriver.setServer(new SPARQLConnection2(qef));

    testDriver.init();
    testDriver.run();

}
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
@Override
protected void fillTrie(Logger logger, Trie<Resource> trie, Corpus corpus) throws IOException, ModuleException {
	Model model = createModel(logger);
	Property typeProp = model.getProperty("http://www.w3.org/1999/02/22-rdf-syntax-ns#type");
	Property[] labelPropertyProps = getProperties(model, labelURIs);
	int nEntries = 0;
	for (String resourceTypeURI : resourceTypeURIs) {
		Property resourceType = model.getProperty(model.expandPrefix(resourceTypeURI));
		for (Resource res : Iterators.loop(model.listSubjectsWithProperty(typeProp , resourceType))) {
			if (res.isAnon()) {
				continue;
			}
			for (Property prop : labelPropertyProps) {
				for (RDFNode node : Iterators.loop(model.listObjectsOfProperty(res, prop))) {
					String label = getNodeValue(node);
					trie.addEntry(label, res);
					nEntries++;
				}
			}
		}
	}
	logger.info("Entries: " + nEntries);
}
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
private Model createModel(Logger logger) throws IOException {
		LoggingUtils.configureSilentLog4J();
		Model model = ModelFactory.createDefaultModel();
		model.setNsPrefixes(PrefixMapping.Standard);
		model.setNsPrefix("xsd", "http://www.w3.org/2001/XMLSchema#");
		model.setNsPrefix("skos", "http://www.w3.org/2004/02/skos/core#");
		model.setNsPrefix("oboInOwl", "http://www.geneontology.org/formats/oboInOwl#");
		model.setNsPrefixes(prefixes);
		for (InputStream is : Iterators.loop(source.getInputStreams())) {
			logger.info("loading model from: " + source.getStreamName(is));
//			System.err.println("is = " + is);
//			model.read(is, null, Lang.RDFXML.toString());
			RDFDataMgr.read(model, is, Lang.RDFXML);
		}
		return model;
	}
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
@Override
public RESTResource get(URI uri, Map<String, String> parameters) throws RESTException {
	RESTResource resource = new RESTResource(uri.toString(),this);

	Dataset dataset = ThingDirectory.get().dataset;
	dataset.begin(ReadWrite.READ);

	try {
		Model result = dataset.getNamedModel(uri.toString());
		if (!result.isEmpty()) {
			resource.contentType = "text/turtle";
			ByteArrayOutputStream out = new ByteArrayOutputStream();
			result.write(out, "Turtle");
			resource.content = out.toString();
		} else {
			throw new RESTException();
		}
	} finally {
		dataset.end();
	}
	
	return resource;
}
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
/**
   * Dereference the IRI and look for label property value.
   * @param iri the IRI
   * @return the label if exist, otherwise <code>null</code>
   */
  private String getLabelFromLinkedData(String iri){
  	logger.debug("Get label for " + iri + " from Linked Data...");
  	
try {
	// 1. get triples for the IRI by sending a Linked Data request
	Model model = uriDereferencer.dereference(iri);
	
	// 2. check if we find a label in the triples
	for (String labelProperty : labelProperties) {
		for(Statement st : model.listStatements(model.getResource(iri), model.getProperty(labelProperty), (RDFNode)null).toList()){
			Literal literal = st.getObject().asLiteral();
			
			// language check
			String language = literal.getLanguage();
			if(language != null && language.equals(this.language)){
				return literal.getLexicalForm();
			}
		}
	}
} catch (DereferencingFailedException e) {
	logger.error(e.getMessage(), e);
}
  	return null;
  }
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
private static void write(final RdfStream rdfStream,
                   final OutputStream output,
                   final Lang dataFormat,
                   final MediaType dataMediaType) throws IOException {

    final RDFFormat format = defaultSerialization(dataFormat);

    // For formats that can be block-streamed (n-triples, turtle)
    if (format != null) {
        LOGGER.debug("Stream-based serialization of {}", dataFormat.toString());
        final StreamRDF stream = getWriterStream(output, format);
        stream.start();
        rdfStream.forEach(stream::triple);
        stream.finish();

    // For formats that require analysis of the entire model and cannot be streamed directly (rdfxml, n3)
    } else {
        LOGGER.debug("Non-stream serialization of {}", dataFormat.toString());
        final Model model = rdfStream.collect(toModel());
        // use block output streaming for RDFXML
        if (RDFXML.equals(dataFormat)) {
            RDFDataMgr.write(output, model.getGraph(), RDFXML_PLAIN);
        } else if (JSONLD.equals(dataFormat)) {
            final RDFFormat jsonldFormat = getFormatFromMediaType(dataMediaType);
            RDFDataMgr.write(output, model.getGraph(), jsonldFormat);
        } else {
            RDFDataMgr.write(output, model.getGraph(), dataFormat);
        }
    }
}
 

import org.apache.jena.rdf.model.Model; //導入依賴的package包/類
/**
 * @return a Collector for use with aggregating an RdfStream into a Model.
 */
public static Collector<Triple, ?, Model> toModel() {
    return Collector.of(ModelFactory::createDefaultModel,
        (m, t) -> m.add(m.asStatement(t)),
        (left, right) -> {
            left.add(right);
            return left;
        },
        Collector.Characteristics.UNORDERED);
}