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

Example 6 with Literal

use of org.eclipse.rdf4j.model.Literal 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 7 with Literal

use of org.eclipse.rdf4j.model.Literal 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 8 with Literal

use of org.eclipse.rdf4j.model.Literal 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 9 with Literal

use of org.eclipse.rdf4j.model.Literal 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 10 with Literal

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

the class WriteRdf4j method writeDate.

private void writeDate(SKOSResource resource) {
    int prop;
    Literal literal;
    for (SKOSDate date : resource.getDateList()) {
        literal = vf.createLiteral(date.getDate(), XMLSchema.DATE);
        prop = date.getProperty();
        switch(prop) {
            case SKOSProperty.created:
                builder.add(DCTERMS.CREATED, literal);
                break;
            case SKOSProperty.modified:
                builder.add(DCTERMS.MODIFIED, literal);
                break;
            case SKOSProperty.date:
                builder.add(DCTERMS.DATE, literal);
                break;
            default:
                break;
        }
    }
}