public QueryResult getTopicsForUser(int userId)
        {
            List<Topic> result = new List<Topic>();

            using (DatabaseConnectionMonitor monior = new DatabaseConnectionMonitor(Database))
            {
                using (SqlCommand sqlCommand = Database.CreateCommand(string.Format(sqlFindByUser,
                        userId)))
                {
                    using (SqlDataReader dataReader = sqlCommand.ExecuteReader())
                    {
                        while (dataReader.Read())
                        {
                            Topic topic = doLoad(dataReader);

                            topic.TextCount = dataReader.GetInt32(dataReader.FieldCount - 1);

                            result.Add(topic);
                        }
                    }
                }
            }

            foreach (Topic topic in result)
                assingParent(topic, result);

            foreach (Topic topic in result)
                topic.Weight = 0;

            QueryResult queryResult = new QueryResult(Guid.NewGuid().ToString(), true, result);

            Hashtable filter = new Hashtable();
            filter["UserID"] = userId;

            registerCollection(string.Format(sqlFindByUser, userId), queryResult.QueryId, new QueryOptions(true), filter);

            return queryResult;
        }