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.

  }


  // verbatim copy from JenaUtil
  public static String getValueAsString(RDFNode node) {
    if (node instanceof Literal) {
      Literal lit = (Literal) node;
      return lit.getLexicalForm();


    } else {
      return ((Resource) node).getURI();
    }
  }

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    List<String> list = new ArrayList<String>();
    if ( dataRange != null ) {
      RDFList rdfList = dataRange.getOneOf();
      while ( rdfList != null && ! rdfList.isEmpty() ) {
        RDFNode elem = rdfList.getHead();
        Literal obj = (Literal) elem;
        String name = obj.getLexicalForm();
        list.add(name);
        rdfList = rdfList.getTail();
      }
    }
    return list;

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    Set<Statement> stmts = _info.getDataTypePropertyInstantiations(instance);
    if ( stmts != null ) {
      for (Statement stmt : stmts ) {
        Property prd = stmt.getPredicate();
        Literal obj = (Literal) stmt.getObject();
        
        String prdLabel = _info.getLabel(prd);
        String objLabel = obj.getString();
        
        fields.add("{" +prdLabel+ "|" +objLabel+ "}");
      }
    }

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      if ( prd.getNameSpace().equals(RDFS.getURI()) ) {
//        System.out.println(" ///////**** " +prd);


        if ( RDFS.label.equals(prd) ) {
          Literal objLit = (Literal) obj;
          _rdfsLabels.put(sbj, objLit.getLexicalForm());
          continue;
        }


        if ( RDFS.subPropertyOf.equals(prd)
        ||   RDFS.seeAlso.equals(prd)

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    // add a new statement for termUri in the model:
    Resource termResource = ResourceFactory.createResource(termUri);
    Property description = ResourceFactory.createProperty(descriptionUri);
    String descriptionString = "Generated description " +System.currentTimeMillis();
    Literal descriptionObject = ResourceFactory.createPlainLiteral(descriptionString);
    Statement statement = ResourceFactory.createStatement(termResource, description, descriptionObject);
    model.add(statement);
    System.out.println("New statement: " +statement);
    
    // register a new version with this updated model:

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    }
  }


  private static String _getValueAsString(RDFNode node) {
    if (node instanceof Literal) {
      Literal lit = (Literal) node;
      return lit.getLexicalForm();
    }
    else {
      return ((Resource) node).getURI();
    }
  }

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        Resource release = model.createResource(DOAP.Version) ;
        system.addProperty(DOAP.release, release) ;
        
        Node today_node = NodeFactory.todayAsDate() ;
        Literal today = model.createTypedLiteral(today_node.getLiteralLexicalForm(), today_node.getLiteralDatatype()) ;
        release.addProperty(DOAP.created, today) ;
        release.addProperty(DOAP.name, releaseName) ;      // Again
        
        TestSuite suite = ScriptTestSuiteFactory.make(testManifest) ;
        SimpleTestRunner.runSilent(suite) ;

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//        Literal now = 
//            ResourceFactory.createTypedLiteral(nowStr, XSDDatatype.XSDdateTime) ;


        String todayStr = Utils.todayAsXSDDateString() ;
        
        Literal now = 
            ResourceFactory.createTypedLiteral(todayStr, XSDDatatype.XSDdate) ;
            
        return earl.createResource(EARL.TestResult)
                   .addProperty(EARL.outcome, outcome)
                   .addProperty(DC.date, now) ;

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        if ( n == null )
            return "<null>" ;
        if ( n instanceof Resource )
            return strForResource((Resource)n) ;
        
        Literal lit = (Literal)n ;
        return lit.getLexicalForm() ;
    }

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    private void indexAnnotation(Resource skos_concept, Document conceptDoc,
            AnnotationProperty property, String field) {
        StmtIterator stmt_iter = skos_concept.listProperties(property);
        while (stmt_iter.hasNext()) {
            Literal labelLiteral = stmt_iter.nextStatement().getObject()
                    .as(Literal.class);
            String label = labelLiteral.getLexicalForm();
            String labelLang = labelLiteral.getLanguage();


            if (this.languages != null && !this.languages.contains(labelLang)) {
                continue;
            }

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