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

com.hp.hpl.jena.rdf.model.RDFList

Provides a convenience encapsulation for lists formed from chains of RDF statements arranged to form a head/tail cons-cell structure. The properties that form the links between cells, and from cells to values, are specified by a vocabulary interface, so this abstraction is designed to cope equally well with DAML lists, RDF lists, and user-defined lists.

A well-formed list has cells that are made up of three statements: one denoting the rdf:type of the list cell, one denoting the link to the value of the list at that point, and one pointing to the list tail. If a list cell is not well-formed, list operations may fail in unpredictable ways. However, to explicitly check that the list is well-formed at all times is expensive. Therefore the list operates in two modes: in strict mode, the well-formedness of the list is checked at the start of each list operation, and an {@link InvalidListException} is thrown if the list is notwell- formed. This ensures that list operations are safe, but will slow down processing. In non-strict mode, this checking is switched off, but can be invoked explicitly by clients by calling {@link #isValid}. By default, RDF lists are processed in non-strict mode.

  {
    for (int i = 0; i <= 5; i++)
    {
      model.read("file:testing/ontology/list" + i + ".rdf");


      RDFList l0 = getListRoot(model);


      // get the tail n times, should be nil at the end
      for (int j = 0; j < i; j++)
      {
        l0 = l0.getTail();
      }


      Assert.assertTrue("Should have reached the end of the list after "
          + i + " getTail()'s", l0.isEmpty());
    }
  }

View Full Code Here

    final Property p = model.createProperty(TestList.NS, "p");


    // a list of the nil object, but not typed
    final Resource nil = RDF.nil;
    model.add(root, p, nil);
    final RDFList l0 = getListRoot(model);
    checkValid("valid1", l0, true);


    // add another node to the head of the list
    final Resource badList = model.createResource();
    model.getRequiredProperty(root, p).remove();
    model.add(root, p, badList);
    model.add(badList, RDF.type, RDF.List);


    final RDFList l1 = getListRoot(model);
    checkValid("valid2", l1, false);


    // checkValid( "valid3", l1, false );


    model.add(badList, RDF.first, "fred");

View Full Code Here

    OntClass C = ont.createClass( "C" );


    ObjectProperty p1 = ont.createObjectProperty( "p1" );
    ObjectProperty p2 = ont.createObjectProperty( "p2" );


    RDFList pChain = ont.createList( new RDFNode[] { p1, p2 } );
    ont.add( p1, OWL2.propertyChainAxiom, pChain );


    Individual x = ont.createIndividual( OWL.Thing );
    Individual y = ont.createIndividual( OWL.Thing );
    Individual z = ont.createIndividual( OWL.Thing );

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        inds[0], inds[1], inds[2], inds[3] } );


    assertIteratorValues( class2.listInstances(), new Resource[] {
        inds[2], inds[3], inds[4], inds[5] } );


    RDFList list = ontmodel.createList( new RDFNode[] { class1, class2 } );


    IntersectionClass class3 = ontmodel.createIntersectionClass( null, list );


    UnionClass class4 = ontmodel.createUnionClass( null, list );

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    Resource C = model.createClass( ns + "C" );
    Resource i = model.createResource( ns + "i" );
    Resource j = model.createResource( ns + "j" );
    Resource k = model.createResource( ns + "k" );
    Property p = model.createObjectProperty( ns + "p" );
    RDFList list = model.createList( new RDFNode[] { p } );


    model.add( C, OWL2.hasKey, list );
    model.add( i, RDF.type, C );
    model.add( i, p, k );
    model.add( j, RDF.type, C );

View Full Code Here

    Resource j = model.createResource( ns + "j" );
    Resource k = model.createResource( ns + "k" );
    Resource l = model.createResource( ns + "l" );
    Property p1 = model.createObjectProperty( ns + "p1" );
    Property p2 = model.createObjectProperty( ns + "p2" );
    RDFList list = model.createList( new RDFNode[] { p1, p2 } );


    model.add( C, OWL2.hasKey, list );
    model.add( i, RDF.type, C );
    model.add( i, p1, k );
    model.add( i, p2, l );

View Full Code Here

    Resource C = model.createClass( ns + "C" );
    Resource i = model.createResource( ns + "i" );
    Resource j = model.createResource( ns + "j" );
    Literal k = model.createLiteral( "k" );
    Property p = model.createDatatypeProperty( ns + "p" );
    RDFList list = model.createList( new RDFNode[] { p } );


    model.add( C, OWL2.hasKey, list );
    model.add( i, RDF.type, C );
    model.add( i, p, k );
    model.add( j, RDF.type, C );

View Full Code Here

    Resource D = model.createClass( ns + "D" );
    Resource i = model.createResource( ns + "i" );
    Resource j = model.createResource( ns + "j" );
    Resource k = model.createResource( ns + "k" );
    Property p = model.createObjectProperty( ns + "p" );
    RDFList list = model.createList( new RDFNode[] { p } );


    model.add( C, OWL2.hasKey, list );
    model.add( i, RDF.type, C );
    model.add( i, p, k );
    model.add( j, RDF.type, D );

View Full Code Here

    Resource i = model.createResource( ns + "i" );
    Resource j = model.createResource( ns + "j" );
    Resource k = model.createResource( ns + "k" );
    Resource l = model.createResource( ns + "l" );
    Property p = model.createObjectProperty( ns + "p" );
    RDFList list = model.createList( new RDFNode[] { p } );


    model.add( C, OWL2.hasKey, list );
    model.add( i, RDF.type, C );
    model.add( i, p, k );
    model.add( j, RDF.type, C );

View Full Code Here

    Resource i = model.createResource( ns + "i" );
    Resource j = model.createResource( ns + "j" );
    Resource k = model.createResource( ns + "k" );
    Property p = model.createObjectProperty( ns + "p" );
    Property q = model.createObjectProperty( ns + "q" );
    RDFList list = model.createList( new RDFNode[] { p } );


    model.add( C, OWL2.hasKey, list );
    model.add( i, RDF.type, C );
    model.add( i, p, k );
    model.add( j, RDF.type, C );

View Full Code Here

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