Examples with Statement org.eclipse.rdf4j.model.Statement used on opensource projects

Example 41 with Statement

use of org.eclipse.rdf4j.model.Statement in project opentheso by miledrousset.

the class WriteRdfFileTest method writeRio.

@Test
public void writeRio() {
    FileOutputStream out = null;
    try {
        // a collection of several RDF statements
        Graph myGraph = null;
        out = new FileOutputStream("test_unesco2.rdf");
        try {
            RDFWriter writer = Rio.createWriter(RDFFormat.RDFXML, out);
            writer.startRDF();
            for (Statement st : myGraph) {
                writer.handleStatement(st);
            }
            writer.endRDF();
        } catch (RDFHandlerException e) {
        // oh no, do something!
        }
    } catch (FileNotFoundException ex) {
        Logger.getLogger(WriteRdfFileTest.class.getName()).log(Level.SEVERE, null, ex);
    // oh no, do something!
    } finally {
        try {
            out.close();
        } catch (IOException ex) {
            Logger.getLogger(WriteRdfFileTest.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

Example 42 with Statement

use of org.eclipse.rdf4j.model.Statement in project molgenis by molgenis.

the class EntityModelWriterTest method testAddStatementsForEntityType.

@Test
public void testAddStatementsForEntityType() {
    Model model = new LinkedHashModel();
    Resource subject = valueFactory.createIRI("http://example.org/subject");
    LabeledResource object = new LabeledResource("http://example.org/object", "object");
    LabeledResource codeSystem = new LabeledResource("ex:object");
    SemanticTag<EntityType, LabeledResource, LabeledResource> tag = new SemanticTag<>("tagId", entityType, Relation.isAssociatedWith, object, codeSystem);
    when(tagService.getTagsForEntity(entityType)).thenReturn(singletonList(tag));
    writer.addStatementsForEntityTags(model, subject, entityType);
    Statement statement = valueFactory.createStatement(subject, TYPE, valueFactory.createIRI("http://example.org/object"));
    assertEquals(newArrayList(model), singletonList(statement));
}

Example 43 with Statement

use of org.eclipse.rdf4j.model.Statement in project opentheso by miledrousset.

the class json_ld_first_test method start_test.

@Test
public void start_test() throws FileNotFoundException, IOException, JsonLdError {
    System.out.println("");
    System.out.println("");
    System.out.println("*******************************************************");
    System.out.println("*                     JSON LD                         *");
    System.out.println("*******************************************************");
    InputStream inputStream = new FileInputStream("input_test.json");
    // Read the file into an Object (The type of this object will be a List, Map, String, Boolean,
    // Number or null depending on the root object in the file).
    Object jsonObject = JsonUtils.fromInputStream(inputStream);
    // Create a context JSON map containing prefixes and definitions
    Map context = new HashMap();
    // Customise context...
    // Create an instance of JsonLdOptions with the standard JSON-LD options
    JsonLdOptions options = new JsonLdOptions();
    // Customise options...
    // Call whichever JSONLD function you want! (e.g. compact)
    Object compact = JsonLdProcessor.compact(jsonObject, context, options);
    // Print out the result (or don't, it's your call!)
    System.out.println(JsonUtils.toPrettyString(compact));
    System.out.println("*******************************************************");
    System.out.println("*                     org.JSON                        *");
    System.out.println("*******************************************************");
    inputStream = new FileInputStream("input_test.json");
    JSONObject obj = new JSONObject(IOUtils.toString(inputStream));
    System.out.println(obj.getString("name"));
    obj.put("test", "writeIsWorking");
    System.out.println(obj.getString("test"));
    System.out.println("");
    System.out.println(obj.toString());
    System.out.println("");
    System.out.println("*******************************************************");
    System.out.println("*                     RDJF WRITE                      *");
    System.out.println("*******************************************************");
    ValueFactory vf = SimpleValueFactory.getInstance();
    // Create a new RDF model containing information about the painting "The Potato Eaters"
    ModelBuilder builder = new ModelBuilder();
    Model model = builder.setNamespace("ex", "http://example.org/").subject("ex:PotatoEaters").add("ex:creationDate", vf.createLiteral("1885-04-01T00:00:00Z", XMLSchema.DATETIME)).add("ex:peopleDepicted", 5).build();
    Rio.write(model, System.out, RDFFormat.JSONLD);
    System.out.println("");
    System.out.println("");
    System.out.println("*******************************************************");
    System.out.println("*                     RDJF READ                       *");
    System.out.println("*******************************************************");
    inputStream = new FileInputStream("input_test.json");
    model = Rio.parse(inputStream, "", RDFFormat.JSONLD);
    Rio.write(model, System.out, RDFFormat.JSONLD);
    System.out.println("");
    for (Statement st : model) {
        // we want to see the object values of each statement
        Value value = st.getObject();
        IRI property = st.getPredicate();
        if (property.getLocalName().equals("name")) {
            Literal title = (Literal) value;
            System.out.println("name: " + title.getLabel());
        }
    }
    System.out.println("");
    System.out.println("");
    System.out.println("");
    System.out.println("");
}

Example 44 with Statement

use of org.eclipse.rdf4j.model.Statement in project rdf4j by eclipse.

the class TriGHandlingTest method writeTriG.

/**
 * Helper method to write the given model to TriG and return an InputStream containing the results.
 *
 * @param statements
 * @return An {@link InputStream} containing the results.
 * @throws RDFHandlerException
 */
private InputStream writeTriG(Model statements) throws RDFHandlerException {
    StringWriter writer = new StringWriter();
    RDFWriter trigWriter = new TriGWriter(writer);
    trigWriter.startRDF();
    for (Statement nextStatement : statements) {
        trigWriter.handleStatement(nextStatement);
    }
    trigWriter.endRDF();
    return new ByteArrayInputStream(writer.toString().getBytes(Charset.forName("UTF-8")));
}

Example 45 with Statement

use of org.eclipse.rdf4j.model.Statement in project rdf4j by eclipse.

the class LinkedHashModel method readObject.

private void readObject(ObjectInputStream s) throws IOException, ClassNotFoundException {
    // Read in any hidden serialization magic
    s.defaultReadObject();
    // Read in size
    int size = s.readInt();
    values = new HashMap<Value, ModelNode>(size * 2);
    statements = new LinkedHashSet<ModelStatement>(size);
    // Read in all elements
    for (int i = 0; i < size; i++) {
        Statement st = (Statement) s.readObject();
        add(st);
    }
}