Examples with ModelBuilder org.eclipse.rdf4j.model.util.ModelBuilder used on opensource projects

Example 1 with ModelBuilder

use of org.eclipse.rdf4j.model.util.ModelBuilder 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 2 with ModelBuilder

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

the class WriteRdfFileTest method write2.

@Test
public void write2() {
    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();
    // To see what's in our model, let's just print stuff to the screen
    for (Statement st : model) {
        // we want to see the object values of each property
        IRI property = st.getPredicate();
        Value value = st.getObject();
        if (value instanceof Literal) {
            Literal literal = (Literal) value;
            System.out.println("datatype: " + literal.getDatatype());
            // get the value of the literal directly as a Java primitive.
            if (property.getLocalName().equals("peopleDepicted")) {
                int peopleDepicted = literal.intValue();
                System.out.println(peopleDepicted + " people are depicted in this painting");
            } else if (property.getLocalName().equals("creationDate")) {
                XMLGregorianCalendar calendar = literal.calendarValue();
                Date date = calendar.toGregorianCalendar().getTime();
                System.out.println("The painting was created on " + date);
            }
            // you can also just get the lexical value (a string) without worrying about the datatype
            System.out.println("Lexical value: '" + literal.getLabel() + "'");
        }
    }
    Rio.write(model, System.out, RDFFormat.RDFXML);
}

Example 3 with ModelBuilder

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

the class ReadRdfFileTest method test1.

public void test1() {
    ModelBuilder builder = new ModelBuilder();
    Model model = builder.setNamespace("ex", "http://example.org/").subject("ex:PotatoEaters").add("ex:creationDate", new GregorianCalendar(1885, Calendar.APRIL, 1).getTime()).add("ex:peopleDepicted", 5).build();
    for (Statement st : model) {
        IRI property = st.getPredicate();
        Value value = st.getObject();
        if (value instanceof Literal) {
            Literal literal = (Literal) value;
            // get the value of the literal directly as a Java primitive.
            if (property.getLocalName().equals("peopleDepicted")) {
                int peopleDepicted = literal.intValue();
                System.out.println(peopleDepicted + " people are depicted in this painting");
            } else if (property.getLocalName().equals("creationDate")) {
                XMLGregorianCalendar calendar = literal.calendarValue();
                Date date = calendar.toGregorianCalendar().getTime();
                System.out.println("The painting was created on " + date);
            }
        // You can also just get the lexical value (a string) without
        // worrying about the datatype
        // System.out.println("Lexical value: '" + literal.getLabel() + "'");
        }
    }
}

Example 4 with ModelBuilder

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

the class ReadRdfFileTest method test2.

public static void test2() {
    ValueFactory vf = SimpleValueFactory.getInstance();
    ModelBuilder builder = new ModelBuilder();
    Model model = builder.setNamespace("ex", "http://example.org/").subject("ex:PotatoEaters").add(DC.TITLE, vf.createLiteral("The Potato Eaters", "en")).add(DC.TITLE, vf.createLiteral("De Aardappeleters", "nl")).build();
    // To see what's in our model, let's just print it to the screen
    for (Statement st : model) {
        // we want to see the object values of each statement
        Value value = st.getObject();
        if (value instanceof Literal) {
            Literal title = (Literal) value;
            System.out.println("language: " + title.getLanguage().orElse("unknown"));
            System.out.println(" title: " + title.getLabel());
        }
    }
}

Example 5 with ModelBuilder

use of org.eclipse.rdf4j.model.util.ModelBuilder 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);
}