Examples of org.apache.clerezza.rdf.core.Graph

org.apache.clerezza.rdf.core.Graph
A graph, modeled as a set of triples. This interface does not extend java.util.Set because of the different identity constraints, i.e. two Graphs may be equal (isomorphic) even if the set of triples are not. Implementations MUST be immutable and throw respective exceptions, when add/remove-methods are called. @see org.apache.clerezza.rdf.core.impl.AbstractGraph @author reto

    graph = provider.getMGraph(graphUriRef);
    assertNotNull(graph);
    //check that there is no such graph, but only the mgraph
    boolean expThrown = false;
    try {
      Graph g = provider.getGraph(graphUriRef);
    } catch(NoSuchEntityException e) {
      expThrown = true;
    }


    assertTrue(expThrown);

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  @Test
  public void testCreateGraphExtended() throws Exception {


    TcProvider provider = getInstance();
    Graph graph = provider.createGraph(graphUriRef, null);


    assertNotNull(graph);


    //get a new provider and check that graph is there
    provider = getInstance();

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  @Test
  public void testCreateGraphNoDuplicateNames() throws Exception {


    TcProvider provider = getInstance();
    Graph graph = provider.createGraph(graphUriRef, null);
    assertNotNull(graph);
    boolean expThrown = false;
    try {
      Graph other = provider.createGraph(otherGraphUriRef, null);
    } catch(EntityAlreadyExistsException eaee) {
      expThrown = true;
    }
    assertTrue(expThrown);
  }

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    Triple t1 = createTestTriple();


    TcProvider provider = getInstance();


    Graph graph = provider.createGraph(graphUriRef, createTestTripleCollection(t1));


    assertEquals(1, graph.size());
    assertTrue(graph.contains(t1));
  }

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    Set<Triple> t = new TreeSet<Triple>();
    t.add(t1);


    TcProvider provider = getInstance();


    Graph graph = provider.createGraph(graphUriRef, createTestTripleCollection(t1));


    boolean expThrown = false;


    try {
      graph.add(t1);
    } catch(UnsupportedOperationException uoe) {
      expThrown = true;
    }


    assertTrue(expThrown);
    expThrown = false;


    try {
      graph.remove(t1);
    } catch(UnsupportedOperationException uoe) {
      expThrown = true;
    }


    assertTrue(expThrown);
    expThrown = false;


    try {
      graph.addAll(t);
    } catch(UnsupportedOperationException uoe) {
      expThrown = true;
    }


    assertTrue(expThrown);


    expThrown = false;


    try {
      graph.clear();
    } catch(UnsupportedOperationException uoe) {
      expThrown = true;
    }


    assertTrue(expThrown);


    expThrown = false;


    try {
      graph.removeAll(t);
    } catch(UnsupportedOperationException uoe) {
      expThrown = true;
    }


    assertTrue(expThrown);

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  @Override
  public Graph createGraph(UriRef name, TripleCollection triples) {
    for (WeightedTcProvider provider : providerList) {
      try {
        Graph result = provider.createGraph(name, triples);


        // unregisters a possible Graph or MGraph service under this name
        // provided by a WeightedTcProvider with a lower weight.
        tcDisappears(name);
        mGraphCache.put(name, new MGraphHolder(provider, null));

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    TripleCollection triples = createTestTripleCollection(createTestTriple());


    TcProvider provider = getInstance();
    UriRef name1 = new UriRef("http://myGraph1");
    Graph graph = provider.createGraph(name1, triples);


    UriRef name2 = new UriRef("http://myGraph2");
    Graph secondGraph = provider.createGraph(name2, triples);


    //if we delete graph with name1, the second graph should still be there
    provider.deleteTripleCollection(name1);


    provider = getInstance();
    Graph firstGraph = provider.getGraph(name2);
    assertNotNull(firstGraph);


    //check second name is not there
    boolean expThrown = false;


    try {
      Graph g = provider.getGraph(name1);
    } catch(NoSuchEntityException nses) {
      expThrown = true;
    }


    assertTrue(expThrown);

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   * @return a set containing all language uris. This uris can be used to 
   * add the language to Clerezza over the addLanguage()-method in this class.
   */
  public Set<UriRef> getAllLanguages() {
    Set<UriRef> result = new HashSet<UriRef>();
    Graph lingvojGraph = getLingvojGraph();
    Iterator<Triple> languages = lingvojGraph.filter(null, RDFS.isDefinedBy,
        null);
    while (languages.hasNext()) {
      UriRef languageUri = (UriRef) languages.next().getSubject();
      result.add(languageUri);
    }

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  @Test
  public void testGetTriplesGraph() throws Exception {
    TcProvider provider = getInstance();
    Graph graph = provider.createGraph(graphUriRef,
        createTestTripleCollection(createTestTriple()));
    TripleCollection tc = provider.getTriples(graphUriRef);
    assertNotNull(tc);
  }

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   * graph, then null is returned. The returned uri can be used to
   * add the language to Clerezza over the addLanguage()-method in this class.
   * @return a language uris
   */
  public UriRef getLanguage(String languageName, Language inLanguage) {
    Graph lingvojGraph = getLingvojGraph();
    Iterator<Triple> languages = lingvojGraph.filter(null, RDFS.isDefinedBy, null);
    while (languages.hasNext()) {
      GraphNode languageNode = new GraphNode((UriRef) languages.next().getSubject(), lingvojGraph);
      Iterator<Resource> labels = languageNode.getObjects(RDFS.label);
      while (labels.hasNext()) {
        PlainLiteral label = (PlainLiteral) labels.next();

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