Examples of org.apache.clerezza.rdf.utils.RdfList

org.apache.clerezza.rdf.utils.RdfList
An implementation of an java.util.List backed by an RDF collection (rdf:List). The list allows modification that are reflected to the underlying TripleCollection. It reads the data from the TripleCollection when it is first needed, so changes to the TripleCollection affecting the rdf:List may or may not have an effect on the values returned by instances of this class. For that reason only one instance of this class should be used for accessing an rdf:List of sublists thereof when the lists are being modified, having multiple lists exclusively for read operations (such as for immutable TripleCollections) is not problematic. @author rbn, mir

    private void doListInitialization(TripleCollection tc) {
      if (value instanceof NonLiteral) {    
        if ((tc.filter((NonLiteral) value, RDF.rest, null).hasNext())
            || (tc.filter(
            (NonLiteral) value, OWL.sameAs, RDF_NIL).hasNext())) {
          list = new RdfList((NonLiteral) value, tc);
        }
      }
    }

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  private void instantiateConceptProviders() {
    conceptProviderList.clear();
    MGraph contentGraph = cgProvider.getContentGraph();


    NonLiteral cplNode = getConceptProviderListNode(contentGraph);
    RdfList cpl = new RdfList(cplNode, contentGraph);
    for (int i = 0; i < cpl.size(); i++) {
      NonLiteral conceptProvider = (NonLiteral) cpl.get(i);
      Iterator<Triple> conceptProviderTypes = contentGraph.filter(
          conceptProvider, RDF.type, null);
      if (conceptProviderTypes.hasNext()) {
        UriRef conceptProviderType = (UriRef) conceptProviderTypes.next().getObject();
        if (conceptProviderType.equals(CONCEPTS.LocalConceptProvider)) {

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        CONCEPTS.ConceptProviderList);
    if (triples.hasNext()) {
      return triples.next().getSubject();
    }
    NonLiteral cplNode = new BNode();
    new RdfList(cplNode, contentGraph);
    contentGraph.add(new TripleImpl(cplNode, RDF.type,
        CONCEPTS.ConceptProviderList));
    return cplNode;
  }

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    NonLiteral cplNode = getConceptProviderListNode(contentGraph);
    GraphNode cplGraphNode = new GraphNode(cplNode, contentGraph);
    cplGraphNode.deleteNodeContext();


    cplNode = getConceptProviderListNode(contentGraph);
    RdfList cpl = new RdfList(cplNode, contentGraph);


    int length = types.size();
    for (int i=0; i<length; i++) {
      UriRef conceptProviderType = new UriRef(types.get(i));
      BNode conceptProvider = new BNode();
      contentGraph.add(new TripleImpl(conceptProvider, RDF.type,
          conceptProviderType));
      if (conceptProviderType.equals(CONCEPTS.LocalConceptProvider)) {
        contentGraph.add(new TripleImpl(conceptProvider,
            CONCEPTS.selectedScheme,
            new UriRef(conceptSchemes.get(i))));
      } else {
        contentGraph.add(new TripleImpl(conceptProvider,
            CONCEPTS.sparqlEndPoint,
            new UriRef(sparqlEndPoints.get(i))));
        String defaultGraph = defaultGraphs.get(i);
        if (!defaultGraph.trim().isEmpty()) {
          contentGraph.add(new TripleImpl(conceptProvider,
              CONCEPTS.defaultGraph,
              new UriRef(defaultGraph)));
        }
        contentGraph.add(new TripleImpl(conceptProvider,
            CONCEPTS.queryTemplate,
            LiteralFactory.getInstance().createTypedLiteral(
            queryTemplates.get(i))));
      }
      cpl.add(i, conceptProvider);
    }
    instantiateConceptProviders();
    return Response.status(Status.OK).build();
  }

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    NonLiteral resource = new BNode() {
    };
    NonLiteral listNode = new BNode() {
    };
    mGraph.add(new TripleImpl(resource, RDF.value, listNode));
    List<Resource> list = new RdfList(listNode, mGraph);
    list.add(new PlainLiteralImpl("first"));
    list.add(new PlainLiteralImpl("second"));
    list.add(new PlainLiteralImpl("third"));
    GraphNode node = new GraphNode(resource, mGraph);
    DataFieldResolver dataFieldResolver = new GraphNodeDataFieldResolver(node, simpleFunctions);
    StringReader reader = new StringReader(
        "${ns:rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns#}" +
        "${loop}${loop}${rdf:value/contains}${/loop}${/loop}");

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  @Test
  public void rdfListAsRoot() throws IOException {
    TripleCollection mGraph = new SimpleMGraph();
    NonLiteral resource = new BNode() {
    };
    List<Resource> list = new RdfList(resource, mGraph);
    list.add(new PlainLiteralImpl("first"));
    list.add(new PlainLiteralImpl("second"));
    list.add(new PlainLiteralImpl("third"));
    GraphNode node = new GraphNode(resource, mGraph);
    DataFieldResolver dataFieldResolver = new GraphNodeDataFieldResolver(node, simpleFunctions);
    StringReader reader = new StringReader(
        "${loop}${./contains}${/loop}");
    StringWriter writer = new StringWriter();

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  @Test
  public void rdfListAsRootElementProperties() throws IOException {
    TripleCollection mGraph = new SimpleMGraph();
    NonLiteral resource = new BNode() {
    };
    List<Resource> list = new RdfList(resource, mGraph);
    list.add(createLabeledRes("first", mGraph));
    list.add(createLabeledRes("second", mGraph));
    list.add(createLabeledRes("third", mGraph));
    GraphNode node = new GraphNode(resource, mGraph);
    DataFieldResolver dataFieldResolver = new GraphNodeDataFieldResolver(node, simpleFunctions);
    StringReader reader = new StringReader(
        "${ns:rdfs=http://www.w3.org/2000/01/rdf-schema#}" +
        "${loop}${loop}${contains/rdfs:label}${/loop}${/loop}");

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  @Test
  public void rdfListAsRootElementPropertiesWithPresenceTest() throws IOException {
    TripleCollection mGraph = new SimpleMGraph();
    NonLiteral resource = new BNode() {
    };
    List<Resource> list = new RdfList(resource, mGraph);
    list.add(createLabeledRes("first", mGraph));
    list.add(createLabeledRes("second", mGraph));
    list.add(createLabeledRes("third", mGraph));
    GraphNode node = new GraphNode(resource, mGraph);
    DataFieldResolver dataFieldResolver = new GraphNodeDataFieldResolver(node, simpleFunctions);
    StringReader reader = new StringReader(
        "${ns:rdfs=http://www.w3.org/2000/01/rdf-schema#}" +
        "${loop}${if contains/rdfs:label}${contains/rdfs:label}${/if}${/loop}");

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    };


    NonLiteral listNode1 = new BNode() {
    };
    mGraph.add(new TripleImpl(resource, RDF.value, listNode1));
    List<Resource> list1 = new RdfList(listNode1, mGraph);
    list1.add(new PlainLiteralImpl("first"));
    list1.add(new PlainLiteralImpl("second"));
    list1.add(new PlainLiteralImpl("third"));


    NonLiteral listNode2 = new BNode() {
    };
    mGraph.add(new TripleImpl(resource, RDF.value, listNode2));
    RdfList.createEmptyList(listNode2, mGraph);

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  @Before
  public void before() {
    typePrioritizer = new TypePrioritizer();
    MGraph mGraph = new SimpleMGraph();
    RdfList rdfList = new RdfList(TypePrioritizer.typePriorityListUri, mGraph);
    rdfList.add(FOAF.Person);
    rdfList.add(FOAF.Group);
    rdfList.add(FOAF.Agent);
    final LockableMGraph systemGraph = new LockableMGraphWrapperForTesting(mGraph);
    typePrioritizer.bindSystemGraph(systemGraph);
  }

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