@Override
  public String createRule(
      String connectionToken,
      int item,
      ITEM_TYPE type,
      String ruleName,
      String event,
      String ruleType,
      String definition)
      throws DatabaseConnectionException, PostgreSQLException {
    ConnectionManager connMgr = new ConnectionManager();
    HttpServletRequest request = this.getThreadLocalRequest();

    String clientIP = ConnectionInfo.remoteAddr(request);
    String userAgent = request.getHeader("User-Agent");

    Rules rules;

    rules = new Rules(connMgr.getConnection(connectionToken, clientIP, userAgent));

    try {
      return rules.createRule(item, type, ruleName, event, ruleType, definition);
    } catch (SQLException e) {
      throw new PostgreSQLException(e.getMessage());
    }
  }
  @Override
  public String getItemObjectList(
      String connectionToken, int item, ITEM_TYPE type, ITEM_OBJECT_TYPE object)
      throws IllegalArgumentException, DatabaseConnectionException, PostgreSQLException {

    ConnectionManager connMgr = new ConnectionManager();
    HttpServletRequest request = this.getThreadLocalRequest();

    String clientIP = ConnectionInfo.remoteAddr(request);
    String userAgent = request.getHeader("User-Agent");

    try {
      switch (object) {
        case TRIGGER:
          Triggers triggers =
              new Triggers(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return triggers.getList(item);
        case COLUMN:
          Columns columns =
              new Columns(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return columns.getList(item);
        case CONSTRAINT:
          Constraints constraints =
              new Constraints(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return constraints.getList(item);
        case GRANT:
          Privileges priv =
              new Privileges(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return priv.getPrivileges(item, type);
        case INDEX:
          Indexes indexes =
              new Indexes(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return indexes.getList(item);
        case RULE:
          Rules rules = new Rules(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return rules.getList(item);
        case SOURCE:
          SourceCode sc =
              new SourceCode(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return sc.getSourceCode(item, type);
        case STATS:
          Stats stats = new Stats(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return stats.getList(item);
        default:
          return "";
      }
    } catch (SQLException e) {
      throw new PostgreSQLException(e.getMessage());
    }
  }
  @Override
  public String dropItemObject(
      String connectionToken, int item, ITEM_TYPE type, String objectName, ITEM_OBJECT_TYPE objType)
      throws DatabaseConnectionException, PostgreSQLException {

    ConnectionManager connMgr = new ConnectionManager();
    HttpServletRequest request = this.getThreadLocalRequest();

    String clientIP = ConnectionInfo.remoteAddr(request);
    String userAgent = request.getHeader("User-Agent");

    try {
      switch (objType) {
        case COLUMN:
          Columns columns =
              new Columns(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return columns.drop(item, q.addQuote(objectName));

        case CONSTRAINT:
          Constraints constraints =
              new Constraints(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return constraints.drop(item, q.addQuote(objectName));
        case INDEX:
          Indexes indexes =
              new Indexes(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return indexes.drop(item, q.addQuote(objectName));
        case RULE:
          Rules rules = new Rules(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return rules.drop(item, q.addQuote(objectName));
        case TRIGGER:
          Triggers triggers =
              new Triggers(connMgr.getConnection(connectionToken, clientIP, userAgent));
          return triggers.drop(item, q.addQuote(objectName));

        default:
          return "";
      }
    } catch (SQLException e) {
      throw new PostgreSQLException(e.getMessage());
    }
  }