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

Example 1 with Model

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

the class ReadRdfFile_rdf4j method readFile.

// TODO add test methods here.
// The methods must be annotated with annotation @Test. For example:
// 
@Test
public void readFile() {
    File file = new File("/Users/Miled/Desktop/Bureau2/test_unesco.rdf");
    RDFParser rdfParser = Rio.createParser(RDFFormat.RDFXML);
    Model model = new LinkedHashModel();
    rdfParser.setRDFHandler(new StatementCollector(model));
    Rio.write(model, System.out, RDFFormat.TURTLE);
    try {
        rdfParser.parse(new FileReader(file), "http://example.org");
        /*       for (Statement statement : model) {
                
        //        writeLine(statement.getObject().stringValue(), statement.getSubject().stringValue());

                System.out.println("LocalName = " + statement.getPredicate().getLocalName());

                System.out.println("objet = " + statement.getObject().stringValue());
                System.out.println("predicat = " + statement.getPredicate());
                System.out.println("URI = " + statement.getSubject());
                System.out.println("");
               
           //     model.getNamespace(statement.getClass().getgetObject().stringValue());

            } */
        for (Statement statement2 : model) {
            Literal literal = (SimpleLiteral) statement2;
            System.out.println(literal.getLabel());
            // System.out.println(literal.getLanguage());
            System.out.println(literal.getDatatype());
        }
    } catch (IOException e) {
    // handle IO problems (e.g. the file could not be read)
    } catch (RDFParseException e) {
    // handle unrecoverable parse error
    } catch (RDFHandlerException e) {
    // handle a problem encountered by the RDFHandler
    }
}

Example 2 with Model

use of org.eclipse.rdf4j.model.Model 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 3 with Model

use of org.eclipse.rdf4j.model.Model 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 Model

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

the class ReadRdfFileTest method test4.

@Test
public void test4() {
    // read the file 'example-data-artists.ttl' as an InputStream.
    InputStream is = null;
    try {
        is = new FileInputStream("test_unesco - Copie.rdf");
    } catch (FileNotFoundException ex) {
        Logger.getLogger(ReadRdfFileTest.class.getName()).log(Level.SEVERE, null, ex);
    }
    Model model = null;
    try {
        model = Rio.parse(is, "", RDFFormat.RDFXML);
    } catch (IOException ex) {
        Logger.getLogger(ReadRdfFileTest.class.getName()).log(Level.SEVERE, null, ex);
    } catch (RDFParseException ex) {
        Logger.getLogger(ReadRdfFileTest.class.getName()).log(Level.SEVERE, null, ex);
    } catch (UnsupportedRDFormatException ex) {
        Logger.getLogger(ReadRdfFileTest.class.getName()).log(Level.SEVERE, null, ex);
    }
    for (Statement statement : model) {
        System.out.println(statement);
    }
    System.out.println("\n----------------");
    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("type"))
            System.out.println("\n......\n");
        if (property.getLocalName().equals("notation")) {
            Literal title = (Literal) value;
            System.out.println("notation: " + title.getLabel());
        } else if (property.getLocalName().equals("lat")) {
            Literal title = (Literal) value;
            System.out.println("latitude : " + title.getLabel());
        } else if (property.getLocalName().equals("long")) {
            Literal title = (Literal) value;
            System.out.println("longitude : " + title.getLabel());
        } else if (property.getLocalName().equals("created")) {
            Literal title = (Literal) value;
            System.out.println("created : " + title.getLabel());
        } else if (property.getLocalName().equals("modified")) {
            Literal title = (Literal) value;
            System.out.println("modified : " + title.getLabel());
        } else if (value instanceof Literal) {
            String pref = "";
            if (property.getLocalName().equals("prefLabel"))
                pref = " // pref label";
            Literal title = (Literal) value;
            System.out.println("language: " + title.getLanguage().orElse("unknown"));
            System.out.println(" title: " + title.getLabel() + pref);
        } else {
            System.out.println("   ****  " + value + " //// " + property.getLocalName());
            if (property.getLocalName().equals("type")) {
                System.out.println("        URL: " + st.getSubject());
            }
        }
    }
    Rio.write(model, System.out, RDFFormat.RDFXML);
}

Example 5 with Model

use of org.eclipse.rdf4j.model.Model 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());
        }
    }
}