Example #1
0
  public String getGroups(@Name("filter") String filter) {
    StringWriter resultWriter = new StringWriter();
    JsonFactory f = new JsonFactory();
    f.setCodec(om);
    JsonGenerator g;
    try {
      g = f.createGenerator(resultWriter);

      final Node target = DB.getIndex().get("id", "agents").getSingle();
      TraversalDescription td =
          Traversal.description()
              .relationships(RelTypes.SUBGROUP, Direction.OUTGOING)
              .uniqueness(Uniqueness.NODE_PATH);

      Traverser results = td.traverse(target);
      g.writeStartArray();
      Iterator<Path> paths = results.iterator();
      while (paths.hasNext()) {
        Path path = paths.next();
        if (!path.endNode().hasProperty("name")) continue;
        g.writeStartObject();
        g.writeStringField("name", (String) path.endNode().getProperty("name"));
        g.writeArrayFieldStart("path");
        for (Node pathStep : path.nodes()) {
          if (pathStep.hasProperty("name")) g.writeString((String) pathStep.getProperty("name"));
        }
        g.writeEndArray();
        g.writeEndObject();
      }
      g.writeEndArray();
      g.flush();
    } catch (IOException e) {
      e.printStackTrace();
    }
    resultWriter.flush();
    return resultWriter.toString();
  }
Example #2
0
  // Generate test data in graph like manner:
  private static boolean generateTestData() {
    GraphDatabaseService db = DB.get();

    System.out.println("GenerateTestData() called!");
    Node rootNode = DB.getIndex().get("id", "agents").getSingle();
    if (rootNode == null) {
      Transaction tx = DB.get().beginTx();
      try {
        rootNode = db.createNode();
        rootNode.setProperty("id", "agents");

        ArrayList<Node> groups = new ArrayList<Node>(5);

        Node friendsNode = db.createNode();
        friendsNode.setProperty("name", "friends");
        rootNode.createRelationshipTo(friendsNode, RelTypes.SUBGROUP);
        groups.add(friendsNode);

        Node schoolDaysNode = db.createNode();
        schoolDaysNode.setProperty("name", "schooldays");
        friendsNode.createRelationshipTo(schoolDaysNode, RelTypes.SUBGROUP);
        groups.add(schoolDaysNode);

        Node colleaguesNode = db.createNode();
        colleaguesNode.setProperty("name", "colleagues");
        rootNode.createRelationshipTo(colleaguesNode, RelTypes.SUBGROUP);
        groups.add(colleaguesNode);

        Node projectNode = db.createNode();
        projectNode.setProperty("name", "project X");
        colleaguesNode.createRelationshipTo(projectNode, RelTypes.SUBGROUP);
        groups.add(projectNode);

        Node familyNode = db.createNode();
        familyNode.setProperty("name", "family");
        rootNode.createRelationshipTo(familyNode, RelTypes.SUBGROUP);
        groups.add(familyNode);

        ArrayList<String> names = new ArrayList<String>(20);
        names.add("Jan");
        names.add("Erika");
        names.add("Loes");
        names.add("Piet");
        names.add("Klaas");
        names.add("Joop");
        names.add("Jaap");
        names.add("Daniel");
        names.add("Annelies");
        names.add("Esther");
        names.add("Noa");
        names.add("Lisette");
        names.add("Dorien");
        names.add("Bert");
        names.add("Erik");
        names.add("Albert");
        names.add("Hielke");
        names.add("Ilka");
        names.add("Tamara");
        names.add("Sietse");
        names.add("Gerben");
        names.add("George");
        names.add("Ida");
        names.add("Leonie");

        for (String name : names) {
          Node node = db.createNode();
          node.setProperty("name", name);
          Node group = groups.get((int) Math.floor(Math.random() * groups.size()));
          group.createRelationshipTo(node, RelTypes.GROUPMEMBER);

          if (Math.random() >= 0.5) {
            Node secondGroup = groups.get((int) Math.floor(Math.random() * groups.size()));
            if (!secondGroup.equals(group))
              secondGroup.createRelationshipTo(node, RelTypes.GROUPMEMBER);
          }
        }
        tx.success();
      } finally {
        tx.finish();
      }
    }
    System.out.println("Found rootnode:" + rootNode.getId() + ":" + rootNode.toString());
    return true;
  }
Example #3
0
  public String getContacts(@Name("filter") String filter) {
    StringWriter resultWriter = new StringWriter();
    JsonFactory f = new JsonFactory();
    f.setCodec(om);
    JsonGenerator g;
    try {
      g = f.createGenerator(resultWriter);

      final Node target = DB.getIndex().get("id", "agents").getSingle();
      TraversalDescription td =
          Traversal.description()
              .relationships(RelTypes.GROUPMEMBER, Direction.OUTGOING)
              .relationships(RelTypes.SUBGROUP, Direction.OUTGOING)
              .uniqueness(Uniqueness.NODE_PATH)
              .evaluator(
                  new Evaluator() {
                    @Override
                    public Evaluation evaluate(Path path) {
                      if (path.endNode().hasProperty("name")
                          && path.lastRelationship().isType(RelTypes.GROUPMEMBER)) {
                        return Evaluation.INCLUDE_AND_PRUNE;
                      }
                      return Evaluation.EXCLUDE_AND_CONTINUE;
                    }
                  });

      Traverser results = td.traverse(target);

      Multimap<Long, Path> groupByNode = ArrayListMultimap.create();

      Iterator<Path> paths = results.iterator();
      while (paths.hasNext()) {
        Path path = paths.next();
        groupByNode.put(path.endNode().getId(), path);
      }
      g.writeStartArray();
      for (Long nodeId : groupByNode.keySet()) {
        List<Path> pathList = (List<Path>) groupByNode.get(nodeId);
        g.writeStartObject();
        Node node = pathList.get(0).endNode();
        g.writeStringField("name", (String) node.getProperty("name"));
        g.writeArrayFieldStart("groups");
        for (Path path : pathList) {
          g.writeStartObject();
          g.writeStringField(
              "name", (String) path.lastRelationship().getStartNode().getProperty("name"));
          g.writeArrayFieldStart("path");
          for (Node pathStep : path.nodes()) {
            if (!pathStep.equals(node) && pathStep.hasProperty("name"))
              g.writeString((String) pathStep.getProperty("name"));
          }
          g.writeEndArray();
          g.writeEndObject();
        }
        g.writeEndArray();
        g.writeEndObject();
      }
      g.writeEndArray();
      g.flush();
    } catch (IOException e) {
      e.printStackTrace();
    }
    resultWriter.flush();
    return resultWriter.toString();
  }