How to use org.openrdf.model

Model model = ...
 model.addLiteral (subject, predicate, 10);
 model.addLiteral (subject, predicate, 0.5);
 model.addLiteral (subject, predicate, (float)0.5);
 model.addLiteral (subject, predicate, ResourceFactory.createTypedLiteral(20));
 model.addLiteral (subject, predicate, ResourceFactory.createTypedLiteral(0.99));
 model.addLiteral (subject, predicate, true);
 model.add (subject, predicate, ResourceFactory.createTypedLiteral("2012-03-11", XSDDatatype.XSDdate));
 model.add (subject, predicate, ResourceFactory.createTypedLiteral("P2Y", XSDDatatype.XSDduration));

@Override
public Set makeEmptySet() {
  Model model = makeEmptyModel();
  model.add(vf.createStatement(RDF.TYPE, RDF.TYPE, RDF.PROPERTY, createURI("hidden")));
  return model.filter(null, null, null, ctx0, ctx1);
}

@Override
public String toString() {
  
  final URI s = (URI) stmt.getSubject();
  final URI p = (URI) stmt.getPredicate();
  final URI o = (URI) stmt.getObject();
  return "e["+p.getLocalName()+"]["+s.getLocalName()+"->"+o.getLocalName()+"]";
  
}

@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
  return valueFactory.createLiteral(args[0].stringValue(), XMLSchema.BYTE);
}
@Override

public void addType( String subject, URI type )
{
  URI subjectUri = valueFactory.createURI( subject );
  Statement statement = valueFactory.createStatement( subjectUri, Rdfs.TYPE, type );
  graph.add( statement );
}

public void addName( String subject, String name )
{
  Value nameValue = valueFactory.createLiteral( name );
  URI subjectUri = valueFactory.createURI( subject );
  graph.add( valueFactory.createStatement( subjectUri, Rdfs.LABEL, nameValue ) );
}

private static void addTriple(Resource subject, String predicate, String object, Model model, ValueFactory valueFactory)
    throws RepositoryException {
  if (predicate == null || object == null) return;
  final URI predUri = valueFactory.createURI(predicate);
  final URI objUri = valueFactory.createURI(object);
  Statement stmt = valueFactory.createStatement(subject, predUri, objUri);
  model.add(stmt);
}

@Override
public void statementAdded(Statement st) {
  if (RDFS.SUBCLASSOF.equals(st.getPredicate()) && st.getObject() instanceof Resource) {
    resetClasses();
  }
}

public static String getLiteralPropertyValueAsString(Statement statement) {
  Value object = statement.getObject();
  if(object instanceof Literal) {
    return ((Literal) object).getLabel();
  }
  else {
    return null;
  }
}

/**
 * Describe the service end point(s).
 * 
 * @see #endpoint
 */
protected void describeServiceEndpoints() {
  for (String uri : serviceURI) {
    g.add(aService, SD.endpoint, g.getValueFactory().createURI(uri));
  }
}
 

private void checkUpdatedStatement(Statement st) {
  IRI pred = st.getPredicate();
  if (pred.equals(RDF.TYPE) || pred.equals(RDFS.SUBCLASSOF) || pred.equals(RDFS.SUBPROPERTYOF)) {
    updateNeeded = true;
  }
}

  public String toString() {
    if (_resource instanceof URI) {
      return "<!" + ((URI)_resource).getURI() + ">";
    }
    else {
      return "_:" + ((BNode)_resource).getID();
    }

  }
}

@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
  String first = args[0].stringValue();
  String second = args[1].stringValue();
  return valueFactory.createLiteral(first + second);
}

public void addRelationship( String subject, URI relationship, String object )
{
  URI subjectUri = valueFactory.createURI( subject );
  URI objectUri = valueFactory.createURI( object );
  Statement statement = valueFactory.createStatement( subjectUri, relationship, objectUri );
  graph.add( statement );
}

private static void addTypeTriple(Resource subject, String type, Model model, ValueFactory valueFactory) throws RepositoryException {
  if (type == null) return;
  final URI predUri = valueFactory.createURI(Namespaces.NS_RDF + "type");
  final URI rdfType = valueFactory.createURI(type);
  Statement stmt = valueFactory.createStatement(subject, predUri, rdfType);
  model.add(stmt);
}

/**
 * Describe the service end point(s).
 * 
 * @see #endpoint
 */
protected void describeServiceEndpoints() {
  for (String uri : serviceURI) {
    g.add(aService, SD.endpoint, g.getValueFactory().createURI(uri));
  }
}
 

@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
  String first = args[0].stringValue();
  String second = args[1].stringValue();
  return valueFactory.createLiteral(first + second);
}
@Override

@Override
public void triple(String s, String p, String o) {
  if (s == null || p == null || o == null) {
    // TODO: i don't know what to do here!!!!
    return;
  }
  // This method is always called with three URIs as subject predicate and
  // object
  Statement result = vf.createStatement(vf.createURI(s), vf.createURI(p), vf.createURI(o));
  storageGraph.add(result);
}

@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
  return valueFactory.createLiteral(args[0].stringValue(), XMLSchema.SHORT);
}
@Override

@Override
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException {
  String first = args[0].stringValue();
  String second = args[1].stringValue();
  return valueFactory.createLiteral(first + second);
}