Examples of com.hp.hpl.jena.rdf.model.Literal

com.hp.hpl.jena.rdf.model.Literal
An RDF Literal.
In RDF2003 literals can be typed. If typed then the literal comprises a datatype, a lexical form and a value (together with an optional xml:lang string). Old style literals have no type and are termed "plain" literals.

Implementations of this interface should be able to support both plain and typed literals. In the case of typed literals the primitive accessor methods such as getInt() determine if the literal value can be coerced to an appropriate java wrapper class. If so then the class is unwrapped to extract the primitive value returned. If the coercion fails then a runtime DatatypeFormatException is thrown.

In the case of plain literals then the primitve accessor methods duplicate the behvaiour of jena1. The literal is internally stored in lexical form but the accessor methods such as getInt will attempt to parse the lexical form and if successful will return the primitive value.

Object (i.e. non-primitive) values are supported. In the case of typed literals then a global TypeMapper registry determines what datatype representation to use for a given Object type. In the case of plain literals then the object will be stored in the lexical form given by its toString method. Factory objects, provided by the application, are needed in that case to covert the lexical form back into the appropriate object type.

    super(name);
  }


  public void testCreateLiteral()
  {
    final Literal l = ResourceFactory.createPlainLiteral("lex");
    Assert.assertTrue(l.getLexicalForm().equals("lex"));
    Assert.assertTrue(l.getLanguage().equals(""));
    Assert.assertNull(l.getDatatype());
    Assert.assertNull(l.getDatatypeURI());
  }

View Full Code Here

    Assert.assertTrue(stmt.getObject().equals(o));
  }


  public void testCreateTypedLiteral()
  {
    final Literal l = ResourceFactory.createTypedLiteral("22",
        XSDDatatype.XSDinteger);
    Assert.assertTrue(l.getLexicalForm().equals("22"));
    Assert.assertTrue(l.getLanguage().equals(""));
    Assert.assertTrue(l.getDatatype() == XSDDatatype.XSDinteger);
    Assert.assertTrue(l.getDatatypeURI().equals(
        XSDDatatype.XSDinteger.getURI()));


  }

View Full Code Here


  }


  public void testCreateTypedLiteralObject()
  {
    final Literal l = ResourceFactory.createTypedLiteral(new Integer(22));
    Assert.assertEquals("22", l.getLexicalForm());
    Assert.assertEquals("", l.getLanguage());
    Assert.assertEquals(XSDDatatype.XSDint, l.getDatatype());
  }

View Full Code Here

    final Calendar testCal = new GregorianCalendar(
        TimeZone.getTimeZone("GMT"));
    testCal.set(1999, 4, 30, 15, 9, 32);
    testCal.set(Calendar.MILLISECOND, 0); // ms field can be undefined on
    // Linux
    final Literal lc = ResourceFactory.createTypedLiteral(testCal);
    Assert.assertEquals("calendar overloading test", ResourceFactory
        .createTypedLiteral("1999-05-30T15:09:32Z",
            XSDDatatype.XSDdateTime), lc);


  }

View Full Code Here

    Assert.assertTrue(model.containsLiteral(X, P, 99));
  }


  public void testAddWithLiteralObject()
  {
    final Literal lit = model.createLiteral("spoo");
    model.addLiteral(X, P, lit);
    Assert.assertTrue(model.contains(X, P, lit));
    Assert.assertTrue(model.containsLiteral(X, P, lit));
  }

View Full Code Here

  {
    final Model model = ModelFactory.createDefaultModel();
    final Resource R = model.createResource("http://example/r");
    final Property P = model.createProperty("http://example/p");
    model.add(R, P, "2", XSDDatatype.XSDinteger);
    final Literal L = ResourceFactory.createTypedLiteral("2",
        XSDDatatype.XSDinteger);
    Assert.assertTrue(model.contains(R, P, L));
    Assert.assertFalse(model.contains(R, P, "2"));
  }

View Full Code Here

  }


  private void testContainer( final Model model, final Container cont1,
      final Container cont2 )
  {
    final Literal tvLiteral = model.createLiteral("test 12 string 2");
    // Resource tvResObj = model.createResource( new ResTestObjF() );
    final Object tvLitObj = new LitTestObj(1234);
    model.createBag();
    model.createAlt();
    model.createSeq();

View Full Code Here

  }


  private void testResource( final Model model, final Resource r,
      final int numProps )
  {
    final Literal tvLiteral = model.createLiteral("test 12 string 2");
    final Resource tvResource = model.createResource();
    final String lang = "fr";
    //
    Assert.assertTrue(r.addLiteral(RDF.value,
        AbstractModelTestBase.tvBoolean).hasLiteral(RDF.value,

View Full Code Here

  public void testInModel()
  {


    final Model m1 = createModel();
    final Model m2 = createModel();
    final Literal l1 = m1.createLiteral("17");
    final Literal l2 = l1.inModel(m2);
    Assert.assertEquals(l1, l2);
    Assert.assertSame(m2, l2.getModel());
  }

View Full Code Here

    {
      final UniqueValueClass1 ra = new UniqueValueClass1("rhubarb");
      final UniqueValueClass1 rb = new UniqueValueClass1("cottage");
      Assert.assertNull("not expecting registered RDF Datatype",
          TypeMapper.getInstance().getTypeByValue(ra));
      final Literal la = model.createTypedLiteral(ra); // Sets the type
                                // mapper
      // - contaminates it
      // with
      // UniqueValueClass1
      final Literal lb = model.createTypedLiteral(rb);
      JenaTestBase
          .assertInstanceOf(AdhocDatatype.class, la.getDatatype());
      Assert.assertSame(la.getDatatype(), lb.getDatatype());
      Assert.assertNotNull(TypeMapper.getInstance().getTypeByValue(ra));
    }
    finally
    {
      TypeMapper.reset();

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of com.hp.hpl.jena.rdf.model.Literal

arq.examples.Ex1

arq.examples.ExProg1

arq.examples.ExProg2

arq.examples.ExQuerySelect1

arq.qtest

com.clarkparsia.pellet.test.query.TestSingleSPARQLDLQueries

com.clarkparsia.pellint.rdfxml.OWLSyntaxChecker

com.github.jsonldjava.jena.JenaRDFParser

com.hp.gloze.www_w3_org_2001_XMLSchema.element

com.hp.gloze.www_w3_org_2001_XMLSchema.schema

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.