/// <summary>
        /// Insert a new database record, or updates one if it already exists from the supplied data transfer object.
        /// This is typically used during the import of existing data to the Database.
        /// </summary>
        /// <param name="transaction">
        /// The current <see cref="NpgsqlTransaction"/> to the database.
        /// </param>
        /// <param name="partition">
        /// The database partition (schema) where the requested resource will be stored.
        /// </param>
        /// <param name="prefixedUnit">
        /// The prefixedUnit DTO that is to be persisted.
        /// </param>
        /// <param name="container">
        /// The container of the DTO to be persisted.
        /// </param>
        /// <returns>
        /// True if the concept was successfully persisted.
        /// </returns>
        public virtual bool Upsert(NpgsqlTransaction transaction, string partition, CDP4Common.DTO.PrefixedUnit prefixedUnit, CDP4Common.DTO.Thing container = null)
        {
            var valueTypeDictionaryAdditions = new Dictionary <string, string>();

            base.Upsert(transaction, partition, prefixedUnit, container);

            using (var command = new NpgsqlCommand())
            {
                var sqlBuilder = new System.Text.StringBuilder();

                sqlBuilder.AppendFormat("INSERT INTO \"{0}\".\"PrefixedUnit\"", partition);
                sqlBuilder.AppendFormat(" (\"Iid\", \"Prefix\")");
                sqlBuilder.AppendFormat(" VALUES (:iid, :prefix)");

                command.Parameters.Add("iid", NpgsqlDbType.Uuid).Value    = prefixedUnit.Iid;
                command.Parameters.Add("prefix", NpgsqlDbType.Uuid).Value = !this.IsDerived(prefixedUnit, "Prefix") ? prefixedUnit.Prefix : Utils.NullableValue(null);
                sqlBuilder.Append(" ON CONFLICT (\"Iid\")");
                sqlBuilder.Append(" DO UPDATE ");
                sqlBuilder.Append(" SET \"Prefix\"");
                sqlBuilder.Append(" = :prefix;");

                command.CommandText = sqlBuilder.ToString();
                command.Connection  = transaction.Connection;
                command.Transaction = transaction;

                this.ExecuteAndLogCommand(command);
            }

            return(true);
        }
        /// <summary>
        /// Update a database record from the supplied data transfer object.
        /// </summary>
        /// <param name="transaction">
        /// The current <see cref="NpgsqlTransaction"/> to the database.
        /// </param>
        /// <param name="partition">
        /// The database partition (schema) where the requested resource will be updated.
        /// </param>
        /// <param name="prefixedUnit">
        /// The PrefixedUnit DTO that is to be updated.
        /// </param>
        /// <param name="container">
        /// The container of the DTO to be updated.
        /// </param>
        /// <returns>
        /// True if the concept was successfully updated.
        /// </returns>
        public virtual bool Update(NpgsqlTransaction transaction, string partition, CDP4Common.DTO.PrefixedUnit prefixedUnit, CDP4Common.DTO.Thing container = null)
        {
            bool isHandled;
            var  valueTypeDictionaryAdditions = new Dictionary <string, string>();
            var  beforeUpdate = this.BeforeUpdate(transaction, partition, prefixedUnit, container, out isHandled, valueTypeDictionaryAdditions);

            if (!isHandled)
            {
                beforeUpdate = beforeUpdate && base.Update(transaction, partition, prefixedUnit, container);

                using (var command = new NpgsqlCommand())
                {
                    var sqlBuilder = new System.Text.StringBuilder();
                    sqlBuilder.AppendFormat("UPDATE \"{0}\".\"PrefixedUnit\"", partition);
                    sqlBuilder.AppendFormat(" SET \"Prefix\"");
                    sqlBuilder.AppendFormat(" = :prefix");
                    sqlBuilder.AppendFormat(" WHERE \"Iid\" = :iid;");

                    command.Parameters.Add("iid", NpgsqlDbType.Uuid).Value    = prefixedUnit.Iid;
                    command.Parameters.Add("prefix", NpgsqlDbType.Uuid).Value = !this.IsDerived(prefixedUnit, "Prefix") ? prefixedUnit.Prefix : Utils.NullableValue(null);

                    command.CommandText = sqlBuilder.ToString();
                    command.Connection  = transaction.Connection;
                    command.Transaction = transaction;

                    this.ExecuteAndLogCommand(command);
                }
            }

            return(this.AfterUpdate(beforeUpdate, transaction, partition, prefixedUnit, container));
        }
        /// <summary>
        /// The mapping from a database record to data transfer object.
        /// </summary>
        /// <param name="reader">
        /// An instance of the SQL reader.
        /// </param>
        /// <returns>
        /// A deserialized instance of <see cref="CDP4Common.DTO.PrefixedUnit"/>.
        /// </returns>
        public virtual CDP4Common.DTO.PrefixedUnit MapToDto(NpgsqlDataReader reader)
        {
            string tempModifiedOn;
            string tempIsDeprecated;

            var valueDict      = (Dictionary <string, string>)reader["ValueTypeSet"];
            var iid            = Guid.Parse(reader["Iid"].ToString());
            var revisionNumber = int.Parse(valueDict["RevisionNumber"]);

            var dto = new CDP4Common.DTO.PrefixedUnit(iid, revisionNumber);

            dto.ExcludedPerson.AddRange(Array.ConvertAll((string[])reader["ExcludedPerson"], Guid.Parse));
            dto.ExcludedDomain.AddRange(Array.ConvertAll((string[])reader["ExcludedDomain"], Guid.Parse));
            dto.Alias.AddRange(Array.ConvertAll((string[])reader["Alias"], Guid.Parse));
            dto.Definition.AddRange(Array.ConvertAll((string[])reader["Definition"], Guid.Parse));
            dto.HyperLink.AddRange(Array.ConvertAll((string[])reader["HyperLink"], Guid.Parse));
            dto.ReferenceUnit = Guid.Parse(reader["ReferenceUnit"].ToString());
            dto.Prefix        = Guid.Parse(reader["Prefix"].ToString());

            if (valueDict.TryGetValue("ModifiedOn", out tempModifiedOn))
            {
                dto.ModifiedOn = Utils.ParseUtcDate(tempModifiedOn);
            }

            if (valueDict.TryGetValue("IsDeprecated", out tempIsDeprecated))
            {
                dto.IsDeprecated = bool.Parse(tempIsDeprecated);
            }

            return(dto);
        }