org.apache.commons.rdf.api.Graph类的使用及代码示例

x33g5p2x  于2022-01-20 转载在 其他  
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本文整理了Java中org.apache.commons.rdf.api.Graph类的一些代码示例，展示了Graph类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Graph类的具体详情如下：
包路径：org.apache.commons.rdf.api.Graph
类名称：Graph

Graph介绍

[英]An RDF 1.1 Graph, a set of RDF triples, as defined by RDF-1.1 Concepts and Abstract Syntax, a W3C Recommendation published on 25 February 2014.
[中]一个RDF 1.1 Graph，一组RDF三元组，由RDF-1.1 Concepts and Abstract Syntax定义，W3C建议于2014年2月25日发布。

代码示例

代码示例来源：origin: org.apache.commons/commons-rdf-api

/**
 * This method is deprecated, use the equivalent method {@link #stream()}
 * instead.
 *
 * @return A {@link Stream} over all triples.
 */
@Deprecated
default Stream<? extends Triple> getTriples() {
  return stream();
}

代码示例来源：origin: org.trellisldp/trellis-constraint-rules

private static boolean hasMembershipProps(final Graph graph) {
  return graph.contains(null, LDP.membershipResource, null)
      && (graph.stream(null, LDP.hasMemberRelation, null).count()
        + graph.stream(null, LDP.isMemberOfRelation, null).count() == 1L);
}

代码示例来源：origin: org.apache.commons/commons-rdf-api

@Test
public void clear() throws Exception {
  graph.clear();
  assertFalse(graph.contains(alice, knows, bob));
  assertEquals(0, graph.size());
  graph.clear(); // no-op
  assertEquals(0, graph.size());
}

代码示例来源：origin: org.apache.commons/commons-rdf-jena

final JenaIRI s = factory.createIRI("http://example.com/s");
final JenaLiteral literal123 = factory.createLiteral("123", Types.XSD_INTEGER);
assertTrue(graph.contains(s, p, literal123));
final BlankNodeOrIRI bnode1 = graph.stream(null, p1, null).findFirst().map(Triple::getSubject).get();
assertTrue(bnode1 instanceof BlankNode);
final RDFTerm obj = graph.stream(bnode1, p1, null).findFirst().map(Triple::getObject).get();
assertTrue(graph.contains(bnode2, q, literalR));
assertEquals(3, graph.size());
graph.add(bnode1, p1, bnode2);
assertEquals(3, graph.size());
graph.stream(bnode2, null, null).findFirst().ifPresent(graph::add);
assertEquals(3, graph.size());
final JenaIRI p2 = factory.createIRI("http://example/p2");
final JenaLiteral foo = factory.createLiteral("foo");
graph.add(s2, p2, foo);
assertEquals(4, graph.size());
assertTrue(graph.contains(s2, p2, foo));

代码示例来源：origin: org.apache.commons/commons-rdf-api

@Test
public void remove() throws Exception {
  final long fullSize = graph.size();
  graph.remove(alice, knows, bob);
  final long shrunkSize = graph.size();
  assertEquals(1, fullSize - shrunkSize);
  graph.remove(alice, knows, bob);
  assertEquals(shrunkSize, graph.size()); // unchanged
  graph.add(alice, knows, bob);
  graph.add(alice, knows, bob);
  graph.add(alice, knows, bob);
  assertTrue(graph.size() > shrunkSize);
  graph.remove(alice, knows, bob);
  assertEquals(shrunkSize, graph.size());
  try (Stream<? extends Triple> stream = graph.stream()) {
    final Optional<? extends Triple> anyTriple = stream.findAny();
    Assume.assumeTrue(anyTriple.isPresent());
  graph.remove(otherTriple);
  assertEquals(shrunkSize - 1, graph.size());
  graph.remove(otherTriple);
  assertEquals(shrunkSize - 1, graph.size()); // no change
  graph.add(otherTriple);

代码示例来源：origin: org.apache.commons/commons-rdf-api

@Test
public void getGraph1() throws Exception {
  // graph1 should be present
  try (final Graph g1 = dataset.getGraph(graph1).get()) {
    assertEquals(4, g1.size());
    assertTrue(g1.contains(alice, name, aliceName));
    assertTrue(g1.contains(alice, knows, bob));
    assertTrue(g1.contains(alice, member, null));
    assertTrue(g1.contains(null, name, secretClubName));
  }
}

代码示例来源：origin: trellis-ldp/trellis

graph.add(rdf.createTriple(subject, DC.title, literal));
graph.add(rdf.createTriple(subject, DC.subject, bnode));
graph.add(rdf.createTriple(bnode, DC.title, literal));
final List<Triple> triples = graph.stream()
  .map(HttpUtils.skolemizeTriples(mockResourceService, "http://example.org/"))
  .collect(toList());
  .map(t -> () -> assertTrue(graph.contains(t), "Graph doesn't include triple: " + t)));

代码示例来源：origin: org.trellisldp/trellis-test

/**
 * Check an event graph for required properties.
 * @param resource the resource IRI
 * @param agent the agent IRI
 * @param activity the activity IRI
 * @param ldpType the LDP type of the resource
 * @return a predicate function
 */
public static Predicate<Graph> checkEventGraph(final String resource, final IRI agent, final IRI activity,
    final IRI ldpType) {
  final IRI objectIRI = getInstance().createIRI(resource);
  return g -> g.contains(null, AS.object, objectIRI)
          && g.contains(null, AS.actor, agent)
          && g.contains(null, type, PROV.Activity)
          && g.contains(null, type, activity)
          && g.contains(objectIRI, type, ldpType);
}

代码示例来源：origin: org.apache.commons/commons-rdf-api

/**
 * Add all triples from the source to the target.
 * <p>
 * The triples may be copied in any order. No special conversion or
 * adaptation of {@link BlankNode}s are performed.
 *
 * @param source
 *            Source Graph to copy triples from
 * @param target
 *            Target Graph where triples will be added
 */
private void addAllTriples(final Graph source, final Graph target) {
  // unordered() as we don't need to preserve triple order
  // sequential() as we don't (currently) require target Graph to be
  // thread-safe
  try (Stream<? extends Triple> stream = source.stream()) {
    stream.unordered().sequential().forEach(t -> target.add(t));
  }
}

代码示例来源：origin: trellis-ldp/trellis

@Test
public void testUpdate() {
  final Graph graph = rdf.createGraph();
  getTriples().forEach(graph::add);
  assertEquals(3L, graph.size(), "Incorrect graph size!");
  service.update(graph, "DELETE WHERE { ?s <http://purl.org/dc/terms/title> ?o }", SPARQL_UPDATE, "test:info");
  assertEquals(2L, graph.size(), "Incorrect graph size, post update!");
  service.update(graph, "INSERT { " +
      "<> <http://purl.org/dc/terms/title> \"Other title\" } WHERE {}", SPARQL_UPDATE,
      "trellis:data/resource");
  assertEquals(3L, graph.size(), "Incorrect graph size, after adding triple!");
  service.update(graph, "DELETE WHERE { ?s ?p ?o };" +
      "INSERT { <> <http://purl.org/dc/terms/title> \"Other title\" } WHERE {}", SPARQL_UPDATE,
      "trellis:data/");
  assertEquals(1L, graph.size(), "Incorrect graph size after removing triples!");
  assertEquals("<trellis:data/>", graph.stream().findFirst().map(Triple::getSubject)
      .map(RDFTerm::ntriplesString).get(), "Incorrect graph subject from updates!");
}

代码示例来源：origin: org.trellisldp/trellis-test

/**
 * Check the absense of audit triples.
 */
@Test
@DisplayName("Check the absense of audit triples.")
default void testNoAuditTriples() {
  try (final Response res = target(getResourceLocation()).request().get()) {
    final Graph g = readEntityAsGraph(res.getEntity(), getBaseURL(), TURTLE);
    assertEquals(2L, g.size(), "Check that the graph has 2 triples");
  }
}

代码示例来源：origin: org.apache.commons/commons-rdf-api

@Test
public void testCreateGraph() throws Exception {
  try (final Graph graph = factory.createGraph(); final Graph graph2 = factory.createGraph()) {
    assertEquals("Graph was not empty", 0, graph.size());
    graph.add(factory.createBlankNode(), factory.createIRI("http://example.com/"), factory.createBlankNode());
    assertNotSame(graph, graph2);
    assertEquals("Graph was empty after adding", 1, graph.size());
    assertEquals("New graph was not empty", 0, graph2.size());
  }
}

代码示例来源：origin: commons-rdf/commons-rdf

@Test
public void remove() throws Exception {
  long fullSize = graph.size();
  graph.remove(alice, knows, bob);
  long shrunkSize = graph.size();
  assertEquals(1, fullSize - shrunkSize);
  graph.remove(alice, knows, bob);
  assertEquals(shrunkSize, graph.size()); // unchanged
  graph.add(alice, knows, bob);
  graph.add(alice, knows, bob);
  graph.add(alice, knows, bob);
  // Undetermined size at this point -- but at least it
  // should be bigger
  assertTrue(graph.size() > shrunkSize);
  // and after a single remove they should all be gone
  graph.remove(alice, knows, bob);
  assertEquals(shrunkSize, graph.size());
  Optional<? extends Triple> anyTriple = graph.getTriples().findAny();
  Assume.assumeTrue(anyTriple.isPresent());
  Triple otherTriple = anyTriple.get();
  graph.remove(otherTriple);
  assertEquals(shrunkSize - 1, graph.size());
  graph.remove(otherTriple);
  assertEquals(shrunkSize - 1, graph.size()); // no change
  graph.add(otherTriple);
  assertEquals(shrunkSize, graph.size());
}

代码示例来源：origin: org.apache.commons/commons-rdf-api

@Test
public void removeLanguageTagsCaseInsensitive() throws Exception {
  // COMMONSRDF-51: Ensure we can remove with any casing
  // of literal language tag
  final Literal lower = factory.createLiteral("Hello", "en-gb");
  final Literal upper = factory.createLiteral("Hello", "EN-GB");
  final Literal mixed = factory.createLiteral("Hello", "en-GB");
  final IRI example1 = factory.createIRI("http://example.com/s1");
  final IRI greeting = factory.createIRI("http://example.com/greeting");
  try (final Graph graph = factory.createGraph()) {
    graph.add(example1, greeting, upper);
    // Remove should also honour any case
    graph.remove(example1, null, mixed);
    assertFalse(graph.contains(null, greeting, null));
    graph.add(example1, greeting, lower);
    graph.remove(example1, null, upper);
    // Check with Triple
    graph.add(factory.createTriple(example1, greeting, mixed));
    graph.remove(factory.createTriple(example1, greeting, upper));
    assertFalse(graph.contains(null, greeting, null));
  }
}

代码示例来源：origin: org.apache.commons/commons-rdf-api

@Test
public void containsLanguageTagsCaseInsensitive() throws Exception {
  // COMMONSRDF-51: Ensure we can add/contains/remove with any casing
  // of literal language tag
  final Literal lower = factory.createLiteral("Hello", "en-gb");
  final Literal upper = factory.createLiteral("Hello", "EN-GB");
  final Literal mixed = factory.createLiteral("Hello", "en-GB");
  final IRI example1 = factory.createIRI("http://example.com/s1");
  final IRI greeting = factory.createIRI("http://example.com/greeting");
  try (final Graph graph = factory.createGraph()) {
    graph.add(example1, greeting, upper);
    // any kind of Triple should match
    assertTrue(graph.contains(factory.createTriple(example1, greeting, upper)));
    assertTrue(graph.contains(factory.createTriple(example1, greeting, lower)));
    assertTrue(graph.contains(factory.createTriple(example1, greeting, mixed)));
    // or as patterns
    assertTrue(graph.contains(null, null, upper));
    assertTrue(graph.contains(null, null, lower));
    assertTrue(graph.contains(null, null, mixed));
  }
}

代码示例来源：origin: trellis-ldp/trellis

/**
 * Add a triple to the graph.
 *
 * @param triple an RDF Triple
 */
public void add(final Triple triple) {
  graph.add(triple);
}

代码示例来源：origin: org.apache.commons/commons-rdf-api

@Test
public void iterate() throws Exception {
  Assume.assumeTrue(graph.size() > 0);
  final List<Triple> triples = new ArrayList<>();
  for (final Triple t : graph.iterate()) {
    triples.add(t);
  }
  assertEquals(graph.size(), triples.size());
  if (bobNameTriple != null) {
    assertTrue(triples.contains(bobNameTriple));
  }
  // aborted iteration
  final Iterable<Triple> iterate = graph.iterate();
  final Iterator<Triple> it = iterate.iterator();
  assertTrue(it.hasNext());
  it.next();
  closeIterable(iterate);
  // second iteration - should start from fresh and
  // get the same count
  long count = 0;
  final Iterable<Triple> iterable = graph.iterate();
  for (@SuppressWarnings("unused") final
  Triple t : iterable) {
    count++;
  }
  assertEquals(graph.size(), count);
}

代码示例来源：origin: commons-rdf/commons-rdf

@Test
public void getTriples() throws Exception {
  long tripleCount = graph.getTriples().count();
  assertTrue(tripleCount > 0);
  assertTrue(graph.getTriples().allMatch(t -> graph.contains(t)));
  // Check exact count
  Assume.assumeNotNull(org1, org2, aliceName, bobName, secretClubName,
      companyName, bobNameTriple);
  assertEquals(8, tripleCount);
}

代码示例来源：origin: trellis-ldp/trellis

@BeforeEach
public void setUp() {
  final IRI other = rdf.createIRI("trellis:data/other");
  graph.clear();
  graph.add(rdf.createTriple(subject, ACL.agent, rdf.createIRI("info:agent/foo")));
  graph.add(rdf.createTriple(subject, ACL.agent, rdf.createIRI("info:agent/bar")));
  graph.add(rdf.createTriple(other, ACL.agent, rdf.createIRI("info:agent/baz")));
  graph.add(rdf.createTriple(subject, ACL.agentClass, rdf.createIRI("info:agent/SomeClass")));
  graph.add(rdf.createTriple(other, ACL.agentClass, rdf.createIRI("info:agent/SomeOtherClass")));
  graph.add(rdf.createTriple(subject, ACL.agentGroup, rdf.createIRI("info:group/group1")));
  graph.add(rdf.createTriple(subject, ACL.agentGroup, rdf.createIRI("info:group/group2")));
  graph.add(rdf.createTriple(subject, ACL.agentGroup, rdf.createIRI("info:group/group3")));
  graph.add(rdf.createTriple(subject, ACL.agentGroup, rdf.createIRI("info:group/group4")));
  graph.add(rdf.createTriple(subject, ACL.mode, ACL.Read));
  graph.add(rdf.createTriple(subject, ACL.accessTo, rdf.createIRI("trellis:data/resource2")));
  graph.add(rdf.createTriple(subject, ACL.accessTo, rdf.createIRI("trellis:data/resource3")));
  graph.add(rdf.createTriple(subject, ACL.accessTo, rdf.createIRI("trellis:data/resource4")));
  graph.add(rdf.createTriple(subject, ACL.accessTo, rdf.createIRI("trellis:data/resource4")));
  graph.add(rdf.createTriple(other, ACL.accessTo, rdf.createIRI("trellis:data/resource5")));
  graph.add(rdf.createTriple(subject, ACL.accessToClass, PROV.Activity));
  graph.add(rdf.createTriple(other, ACL.accessToClass, PROV.Entity));
  graph.add(rdf.createTriple(subject, ACL.default_, rdf.createIRI("trellis:data/container")));
}

代码示例来源：origin: trellis-ldp/trellis

@Override
public void close() {
  try {
    innerGraph.close();
  } catch (final Exception ex) {
    throw new RuntimeTrellisException("Error closing graph", ex);
  }
}

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