public ClearanceTypeSearchReturnValue ClearanceTypes(Guid logonId, CollectionRequest collectionRequest,
            ClearanceTypeSearchCriteria criteria)
        {
            ClearanceTypeSearchReturnValue returnValue = new ClearanceTypeSearchReturnValue();

            try
            {
                // Get the logged on user from the current logons and add their
                // ApplicationSettings the list of concurrent sessions.
                Host.LoadLoggedOnUser(logonId);

                try
                {
                    Functions.RestrictRekoopIntegrationUser(UserInformation.Instance.DbUid);
                    switch (UserInformation.Instance.UserType)
                    {
                        case DataConstants.UserType.Staff:
                            // Can do everything
                            break;
                        case DataConstants.UserType.Client:
                        case DataConstants.UserType.ThirdParty:
                            throw new Exception("Access denied");
                        default:
                            throw new Exception("Access denied");
                    }

                    // Create a data list creator for a list of clearance types
                    DataListCreator<ClearanceTypeSearchItem> dataListCreator = new DataListCreator<ClearanceTypeSearchItem>();

                    // Declare an inline event (annonymous delegate) to read the
                    // dataset if it is required
                    dataListCreator.ReadDataSet += delegate(object Sender, ReadDataSetEventArgs e)
                    {
                        e.DataSet = SrvClientChequeRequestLookup.GetClearanceTypes(criteria.IncludeArchived, criteria.IsCredit);
                    };

                    // Create the data list
                    returnValue.ClearanceTypes = dataListCreator.Create(logonId,
                        // Give the query a name so it can be cached
                        "GetClearanceTypes",
                        // Tell it the query criteria used so if the cache is accessed
                        // again it knows if it is the same query
                        criteria.ToString(),
                        collectionRequest,
                        // Import mappings to map the dataset row fields to the data
                        // list entity properties
                        new ImportMapping[] {
                            new ImportMapping("ClearanceTypeId", "ClearanceTypeId"),
                            new ImportMapping("ClearanceTypeDesc", "ClearanceTypeDesc"),
                            new ImportMapping("ClearanceTypeChqDays", "ClearanceTypeChqDays"),
                            new ImportMapping("ClearanceTypeElecDays", "ClearanceTypeElecDays"),
                            new ImportMapping("ClearanceTypeIsCredit", "ClearanceTypeIsCredit"),
                            new ImportMapping("ClearanceTypeArchived", "ClearanceTypeArchived"),
                            }
                        );
                }
                finally
                {
                    // Remove the logged on user's ApplicationSettings from the
                    // list of concurrent sessions
                    Host.UnloadLoggedOnUser();
                }
            }
            catch (System.Data.SqlClient.SqlException)
            {
                returnValue.Success = false;
                returnValue.Message = Functions.SQLErrorMessage;
            }
            catch (Exception Ex)
            {
                returnValue.Success = false;
                returnValue.Message = Ex.Message;
            }

            return returnValue;
        }