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

Example 1 with BNode

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

the class ReadRdfFileTest method test3.

public static void test3() {
    // To create a blank node for the address, we need a ValueFactory
    ValueFactory vf = SimpleValueFactory.getInstance();
    BNode address = vf.createBNode();
    // Identically to example 03, we create a model with some data
    ModelBuilder builder = new ModelBuilder();
    builder.setNamespace("ex", "http://example.org/").subject("ex:Picasso").add(RDF.TYPE, "ex:Artist").add(FOAF.FIRST_NAME, "Pablo").add("ex:homeAddress", // link the blank node
    address).subject(// switch the subject
    address).add("ex:street", "31 Art Gallery").add("ex:city", "Madrid").add("ex:country", "Spain");
    Model model = builder.build();
    // Instead of simply printing the statements to the screen, we use a Rio writer to
    // write the model in RDF/XML syntax:
    Rio.write(model, System.out, RDFFormat.RDFXML);
    File file = new File("test.rdf");
    FileWriter writer = null;
    try {
        file.createNewFile();
        writer = new FileWriter(file);
    } catch (IOException ex) {
        Logger.getLogger(ReadRdfFileTest.class.getName()).log(Level.SEVERE, null, ex);
    }
    Rio.write(model, writer, RDFFormat.RDFXML);
}

Example 2 with BNode

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

the class WriteRdfFileTest method write3.

@Test
public void write3() {
    ValueFactory vf = SimpleValueFactory.getInstance();
    BNode address = vf.createBNode();
    // First we do the same thing we did in example 02: create a new ModelBuilder, and add
    // two statements about Picasso.
    ModelBuilder builder = new ModelBuilder();
    builder.setNamespace("ex", "http://example.org/").subject("ex:Picasso").add(RDF.TYPE, "ex:Artist").add(FOAF.FIRST_NAME, "Pablo").add("ex:homeAddress", // link the blank node
    address).subject(// switch the subject
    address).add("ex:street", "31 Art Gallery").add("ex:city", "Madrid").add("ex:country", "Spain");
    Model model = builder.build();
    // To see what's in our model, let's just print it to the screen
    for (Statement st : model) {
        System.out.println(st);
    }
    Rio.write(model, System.out, RDFFormat.RDFXML);
}

Example 3 with BNode

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

the class SPARQLJSONTupleTest method testBindings2.

@Test
public void testBindings2() throws Exception {
    SPARQLResultsJSONParser parser = new SPARQLResultsJSONParser(SimpleValueFactory.getInstance());
    QueryResultCollector handler = new QueryResultCollector();
    parser.setQueryResultHandler(handler);
    InputStream stream = this.getClass().getResourceAsStream("/sparqljson/bindings2.srj");
    assertNotNull("Could not find test resource", stream);
    parser.parseQueryResult(stream);
    // there must be 7 variables
    assertEquals(7, handler.getBindingNames().size());
    // first must be called "x", etc.,
    assertEquals("x", handler.getBindingNames().get(0));
    assertEquals("hpage", handler.getBindingNames().get(1));
    assertEquals("name", handler.getBindingNames().get(2));
    assertEquals("mbox", handler.getBindingNames().get(3));
    assertEquals("age", handler.getBindingNames().get(4));
    assertEquals("blurb", handler.getBindingNames().get(5));
    assertEquals("friend", handler.getBindingNames().get(6));
    // 2 results
    assertEquals(2, handler.getBindingSets().size());
    // Results are ordered, so first should be alice
    assertEquals("http://work.example.org/alice/", handler.getBindingSets().get(0).getValue("hpage").stringValue());
    for (BindingSet b : handler.getBindingSets()) {
        assertNotNull(b.getValue("x"));
        assertNotNull(b.getValue("hpage"));
        assertNotNull(b.getValue("name"));
        assertNotNull(b.getValue("mbox"));
        assertNotNull(b.getValue("friend"));
        assertTrue(b.getValue("x") instanceof BNode);
        assertTrue(b.getValue("hpage") instanceof IRI);
        assertTrue(b.getValue("name") instanceof Literal);
        assertTrue(b.getValue("friend") instanceof BNode);
        BNode value = (BNode) b.getValue("x");
        if (value.getID().equals("r1")) {
            assertNotNull(b.getValue("blurb"));
            assertTrue(b.getValue("mbox") instanceof Literal);
            assertTrue(b.getValue("blurb") instanceof Literal);
            assertEquals("http://work.example.org/alice/", b.getValue("hpage").stringValue());
            Literal name = (Literal) b.getValue("name");
            assertEquals("Alice", name.stringValue());
            assertFalse(name.getLanguage().isPresent());
            assertEquals(XMLSchema.STRING, name.getDatatype());
            Literal mbox = (Literal) b.getValue("mbox");
            assertEquals("", mbox.stringValue());
            assertFalse(mbox.getLanguage().isPresent());
            assertEquals(XMLSchema.STRING, mbox.getDatatype());
            Literal blurb = (Literal) b.getValue("blurb");
            assertEquals("<p xmlns=\"http://www.w3.org/1999/xhtml\">My name is <b>alice</b></p>", blurb.stringValue());
            assertFalse(blurb.getLanguage().isPresent());
            assertEquals(RDF.XMLLITERAL, blurb.getDatatype());
        } else if (value.getID().equals("r2")) {
            assertNull(b.getValue("blurb"));
            assertTrue(b.getValue("mbox") instanceof IRI);
            assertEquals("http://work.example.org/bob/", b.getValue("hpage").stringValue());
            Literal name = (Literal) b.getValue("name");
            assertEquals("Bob", name.stringValue());
            assertEquals("en", name.getLanguage().orElse(null));
            assertEquals(RDF.LANGSTRING, name.getDatatype());
            assertEquals("mailto:bob@work.example.org", b.getValue("mbox").stringValue());
        } else {
            fail("Found unexpected binding set in result: " + b.toString());
        }
    }
    assertEquals(1, handler.getLinks().size());
    assertEquals("http://www.w3.org/TR/2013/REC-sparql11-results-json-20130321/#example", handler.getLinks().get(0));
}

Example 4 with BNode

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

the class RenderUtils method toSeRQL.

/**
 * Return the query string rendering of the {@link Value}
 *
 * @param theValue
 *        the value to render
 * @return the value rendered in its query string representation
 */
public static String toSeRQL(Value theValue) {
    StringBuilder aBuffer = new StringBuilder();
    if (theValue instanceof IRI) {
        IRI aURI = (IRI) theValue;
        aBuffer.append("<").append(aURI.toString()).append(">");
    } else if (theValue instanceof BNode) {
        aBuffer.append("_:").append(((BNode) theValue).getID());
    } else if (theValue instanceof Literal) {
        Literal aLit = (Literal) theValue;
        aBuffer.append("\"").append(escape(aLit.getLabel())).append("\"");
        if (Literals.isLanguageLiteral(aLit)) {
            aBuffer.append("@").append(aLit.getLanguage());
        } else {
            aBuffer.append("^^<").append(aLit.getDatatype().toString()).append(">");
        }
    }
    return aBuffer.toString();
}

Example 5 with BNode

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

the class ArrangedWriter method queueBlankStatements.

private synchronized Set<Statement> queueBlankStatements(SubjectInContext key) {
    Model firstMatch = blanks.filter(key.getSubject(), null, null, key.getContext());
    Model matches = firstMatch.isEmpty() ? blankReferences.filter(key.getSubject(), null, null, key.getContext()) : firstMatch;
    if (matches.isEmpty()) {
        return null;
    }
    Set<Statement> set = stmtBySubject.get(key);
    if (set == null) {
        stmtBySubject.put(key, set = new TreeSet<Statement>(comparator));
    }
    set.addAll(matches);
    if (firstMatch.isEmpty()) {
        // repeat blank node values
        queueSize += matches.size();
    } else {
        if (repeatBlankNodes && key.getSubject() instanceof BNode && isStillReferenced(key)) {
            blankReferences.addAll(matches);
        }
        blanks.remove(key.getSubject(), null, null, key.getContext());
    }
    return set;
}