コード例 #1
0
  /**
   * helper to load nodes relation to document
   *
   * @param document relationLink document/link
   * @param direction "in" or "out"
   * @return INode instance or null
   */
  private @Nullable INode getRelatedEntity(ODocument document, String direction) {
    Object nodeO = document.field(direction, ORecordId.class);
    if (nodeO == null) {
      logger.error(
          "Could not create related entity while converting relation with direction " + direction);
      return null;
    }
    if (nodeO instanceof ORecordId) nodeO = repositoryFactory.getDb().load((ORecordId) nodeO);
    if (nodeO == null) {
      logger.error("Invalid record in direction " + direction + ": " + document.toString());
      return null;
    }

    // convert
    ODocument nodeDoc = (ODocument) nodeO;

    // slim node: just set title and id
    INode node = new Node();
    node.setTitle(nodeDoc.field("title"));
    node.setId(nodeDoc.getIdentity().toString());

    return node;

    /*
    old -not performant
    String id;
    if (relationO instanceof OIdentifiable) id = ((ORecordId)relationO).getIdentity().toString();
    else {
    	logger.error("Invalid class type: " + relationO.getClass().getName());
    	return null;
    }

    return nodeRepository.find(id);*/
  }
コード例 #2
0
  @Override
  public void deleteByRelation(INode node) {
    // delete source reference pointing to relation node
    OSQLSynchQuery<ODocument> query =
        new OSQLSynchQuery<>(
            "select * from Relation where relationLink.in = "
                + node.getId()
                + " OR relationLink.out = "
                + node.getId());
    List<ODocument> result = db.command(query).execute();

    // remove relation and link
    for (ODocument document : result) {
      ODocument relationLink = getRelationLink(document, true);
      if (relationLink != null && db.load(relationLink.getIdentity()) != null)
        relationLink.delete();

      document.delete();
    }
  }
コード例 #3
0
  @Override
  public List<IRelation> findByRelation(INode node) {
    List<IRelation> list = new LinkedList<>();

    // no NPEs
    if (node == null) return list;

    initDb();

    // execute query
    OSQLSynchQuery<ODocument> query =
        new OSQLSynchQuery<>(
            "select * from Relation where relationLink.in = "
                + node.getId()
                + " OR relationLink.out = "
                + node.getId());
    List<ODocument> result = db.command(query).execute();

    // populate set
    for (ODocument document : result) list.add(convertToEntity(document));

    return list;
  }