using System;
using System.Collections.Generic;
using System.Data.Common;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Sarand.Core.App;
using Sarand.Core.Base;
using Sarand.Core.Bus;
using Sarand.Core.Dbas.Base;
using Sarand.Win.Dbas.Base;
using Sarand.PatientMgr.Core.App;
using Sarand.PatientMgr.Core.Bus;
using Sarand.PatientMgr.Core.Mgr;
using Sarand.PatientMgr.Win.Dbas.Bus;
using Sarand.PatientMgr.Win.Dbas.Internal;
//using Sarand.PatientMgr.Win.Dbas.UpdateLog;
using Sarand.Win.Dbas.Data;

namespace Sarand.PatientMgr.Win.Dbas.Mgr
{
	//=======================================================================
	internal partial class SpmDepartmentMgr_Dbas : SpmDepartmentMgr
	{
		//*******************************************************************
		//                     E m p l o y e e   R o l e
		//*******************************************************************
		// Utilities.

		//-------------------------------------------------------------------
		// Create EmployeeRole.
		public override SpmEmployeeRole CreateEmployeeRole(SysId deparmentId, SysId employeeId, Spm.EmployeeRole employeeRole)
		{
			return new SpmEmployeeRole_Dbas(UserContext, deparmentId, employeeId, employeeRole, 0);
		}
		private SpmEmployeeRole_Dbas CreateEmployeeRole(SwmEmployeeRole_Db dbEmployeeRole)
		{
			ClearErrorState();
			SpmEmployeeRole_Dbas employeeRole = new SpmEmployeeRole_Dbas(UserContext, new SysId(dbEmployeeRole._DepartmentId), new SysId(dbEmployeeRole._EmployeeId), (Spm.EmployeeRole)dbEmployeeRole._Role, (ushort)dbEmployeeRole._Flags);
			PopulateFrom(dbEmployeeRole, employeeRole);
			return employeeRole;
		}

		//-------------------------------------------------------------------
		// Get EmployeeRole.
		public override SpmEmployeeRole GetEmployeeRole(SpmEmployeeRole.Params prm)
		{
			return GetEmployeeRole(GetEmployeeRoleQueryFilter(prm).Concat(" AND ", "(", ")"));
		}
		private SpmEmployeeRole GetEmployeeRole(String filter)
		{
			ClearErrorState();
			long count = GetEmployeeRoleCount(filter);
			if (count == 0) return null;
			if (count != 1)
			{
				SetErrorState("Multiple EmployeeRolees found");
				return null;
			}
			SpmEmployeeRole employeeRole = null;
			// Query data.
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					dbConnection.Open();
					SwmEmployeeRole_Db dbEmployeeRole = new SwmEmployeeRole_Db(DbInfo);
					dbEmployeeRole.PopulateFrom(dbCommand, aliasEmployeeRole, filter);
					employeeRole = CreateEmployeeRole(dbEmployeeRole);
				}
				catch (Exception exc)
				{
					SetErrorState("Database query exception");
					Logger.Warn(GetType().Name + ".GetEmployeeRole\n\tQuery: " + dbCommand.CommandText + "\n\tException: " + exc.Message);
				}
			}
			return employeeRole;
		}

		//-------------------------------------------------------------------
		// Validate EmployeeRole.
		public override bool IsValidEmployeeRoleData(SpmEmployeeRole.Data data, SpmEmployeeRole.ErrField errField)
		{
			ClearErrorState();
			if (!base.IsValidEmployeeRoleData(data, errField)) return false;
			return true;
		}

		//-------------------------------------------------------------------
		// Insert EmployeeRole.
		public override bool InsertEmployeeRole(SpmEmployeeRole employeeRole, DbUpdateInfo dbUpdateInfo)
		{
			ClearErrorState();
			if (!IsValidEmployeeRole(employeeRole)) return false;
			if (SysId.IsValid(employeeRole.Id)) return SetErrorState(ErrorMessage.ValiditemId);
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					dbConnection.Open();
					SwmEmployeeRole_Db dbEmployeeRole = new SwmEmployeeRole_Db(DbInfo);
					PopulateTo(dbEmployeeRole, employeeRole, dbUpdateInfo);
					if (SwmEmployeeRole_Db.FieldsNonId.Contains("Id"))
					{
						// Generate next Id.
						dbEmployeeRole._Id = SysId.ToInt(Database.GetNextId("EmployeeRole", dbUpdateInfo));
					}
					dbEmployeeRole.ExecuteInsertCommand(dbCommand);
					employeeRole.Id = new SysId(dbEmployeeRole._Id);
				}
				catch (Exception exc) { SetErrorState(exc.Message); }
			}
			return !HasErrorState();
		}

		//-------------------------------------------------------------------
		// Update EmployeeRole.
		public override bool UpdateEmployeeRole(SpmEmployeeRole employeeRole, DbUpdateInfo dbUpdateInfo)
		{
			ClearErrorState();
			if (!IsValidEmployeeRole(employeeRole)) return false;
			if (!SysId.IsValid(employeeRole.Id)) return SetErrorState(ErrorMessage.InvalidItemId);
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					// Retrieve EmployeeRole.
					dbConnection.Open();
					SwmEmployeeRole_Db dbEmployeeRole = new SwmEmployeeRole_Db(DbInfo);
					dbEmployeeRole.PopulateFrom(dbCommand, aliasEmployeeRole, "Id=" + SysId.ToString(employeeRole.Id));
					//SpmUpdateLogItemMonitor_EmployeeRole updateLogMonitor = new SpmUpdateLogItemMonitor_EmployeeRole(UserContext, CreateEmployeeRole(dbEmployeeRole));

					// Update properties.
					PopulateTo(dbEmployeeRole, employeeRole, dbUpdateInfo);
					dbEmployeeRole.ExecuteUpdateCommand(dbCommand);

					/* Record updates.
					updateLogMonitor.RecordUpdatedValues(employeeRole);
					updateLogMonitor.LogUpdates();*/
				}
				catch (Exception exc) { SetErrorState(exc.Message); }
			}
			return !HasErrorState();
		}

		//-------------------------------------------------------------------
		// Delete EmployeeRole.
		public override bool EmployeeRoleCanBeDeleted(SpmEmployeeRole employeeRole)
		{
			ClearErrorState();
			if (!base.EmployeeRoleCanBeDeleted(employeeRole)) return false;
			return true;
		}
		public override bool DeleteEmployeeRole(SpmEmployeeRole employeeRole, DbUpdateInfo dbUpdateInfo)
		{
			ClearErrorState();
			if (!EmployeeRoleCanBeDeleted(employeeRole)) return false;
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					// Retrieve EmployeeRole.
					dbConnection.Open();
					SwmEmployeeRole_Db dbEmployeeRole = new SwmEmployeeRole_Db(DbInfo);
					dbEmployeeRole.PopulateFrom(dbCommand, aliasEmployeeRole, "Id=" + employeeRole.Id.ToString());
					// Delete EmployeeRole.
					dbCommand.CommandType = System.Data.CommandType.Text;
					dbCommand.CommandText = "DELETE FROM " + SpmDbDfn.GetTableName(SpmDbDfn.TableIdx.SwmEmployeeRole) + " WHERE Id=" + SysId.ToString(employeeRole.Id) + ";";
					dbCommand.ExecuteNonQuery();
				}
				catch (Exception exc) { SetErrorState(exc.Message); }
			}
			return !HasErrorState();
		}

		//-------------------------------------------------------------------
		// Copy data properties to and from database.
		private void PopulateTo(SwmEmployeeRole_Db dbEmployeeRole, SpmEmployeeRole employeeRole, DbUpdateInfo dbUpdateInfo)
		{
			dbEmployeeRole._Id = employeeRole.Id.ToInt();
			dbEmployeeRole._ApplicFrom = employeeRole.ApplicationFrom;
			dbEmployeeRole._ApplicTo = employeeRole.ApplicationTo;

			dbEmployeeRole._Notes = employeeRole.Notes;
			dbEmployeeRole._Status = SacsSystem.GetStatusCode(employeeRole.Status);
			dbEmployeeRole._Flags = (short)employeeRole.Flags;
			if (!SysId.IsValid(employeeRole.Id))
			{
				dbEmployeeRole._CreateOn = DateTime.UtcNow;
				dbEmployeeRole._CreateBy = dbUpdateInfo.UserId.ToInt();
				dbEmployeeRole._CreateHost = dbUpdateInfo.Host;
			}
			dbEmployeeRole._UpdateOn = DateTime.UtcNow;
			dbEmployeeRole._UpdateBy = dbUpdateInfo.UserId.ToInt();
			dbEmployeeRole._UpdateHost = dbUpdateInfo.Host;
		}
		private void PopulateFrom(SwmEmployeeRole_Db dbEmployeeRole, SpmEmployeeRole employeeRole)
		{
			employeeRole.Id = new SysId(dbEmployeeRole._Id);
			employeeRole.ApplicationFrom = dbEmployeeRole._ApplicFrom;
			employeeRole.ApplicationTo = dbEmployeeRole._ApplicTo;

			employeeRole.Notes = dbEmployeeRole._Notes;
			employeeRole.Status = SacsSystem.GetStatusForCode(dbEmployeeRole._Status);
			employeeRole.SetCreateStamp(dbEmployeeRole._CreateOn, new SysId(dbEmployeeRole._CreateBy), dbEmployeeRole._CreateHost);
			employeeRole.SetUpdateStamp(dbEmployeeRole._UpdateOn, new SysId(dbEmployeeRole._UpdateBy), dbEmployeeRole._UpdateHost);
			employeeRole.AcceptChanges();
		}

		//-------------------------------------------------------------------
		// EmployeeRole column definitions.
		private static readonly String aliasEmployeeRole = "aEmpRole";
		private void SetEmployeeRoleColDfn
			(ColumnDfn col, String caption, int width, SpmDbDfn.ColumnIdx dbCol,
			ColumnAlignment align = ColumnAlignment.Default, DataValue.DataType dataType = DataValue.DataType.String,
			String alias = "", String prefix = "")
		{
			if (String.IsNullOrEmpty(alias) && SpmDbDfn.GetTableForColumn(dbCol) == SpmDbDfn.TableIdx.SwmEmployeeRole)
				alias = aliasEmployeeRole;
			col.Set(caption, width, (int)dbCol, prefix + SpmDbDfn.GetColumnName(dbCol, false), SpmDbDfn.GetColumnNameQual(dbCol, alias), dataType, align);
			if (dataType == DataValue.DataType.String && dbCol != SpmDbDfn.ColumnIdx.Unknown)
				col.MaxLength = (int)SpmDbDfn.GetColTextLen(dbCol);
		}
		//-------------------------------------------------------------------
		// Getting prmEmployeeRole column definition.
		public override ColumnDfn GetEmployeeRoleColumnDfn(SpmEmployeeRole.Column columnId, string caption = "", int width = 0)
		{
			ColumnDfn columnDfn = new ColumnDfn((int)columnId, caption, width);
			switch (columnId)
			{
				case SpmEmployeeRole.Column.Pos:
					SetEmployeeRoleColDfn(columnDfn, "Pos", 42, SpmDbDfn.ColumnIdx.Unknown, ColumnAlignment.Right);
					columnDfn.SortMode = ColumnDfn.ColumnSortMode.Off;
					columnDfn.ReadOnly = true;
					columnDfn.Resizable = false;
					break;
				case SpmEmployeeRole.Column.Id:
					SetEmployeeRoleColDfn(columnDfn, "Id", 40, SpmDbDfn.ColumnIdx.SwmEmployeeRole_Id, ColumnAlignment.Right, DataValue.DataType.Long);
					columnDfn.ReadOnly = true;
					break;

				// EmployeeRole Properties.
				case SpmEmployeeRole.Column.DepartmentId:
					SetEmployeeRoleColDfn(columnDfn, "DepartmentId", 45, SpmDbDfn.ColumnIdx.SwmEmployeeRole_DepartmentId, ColumnAlignment.Right);
					break;
				case SpmEmployeeRole.Column.EmployeeId:
					SetEmployeeRoleColDfn(columnDfn, "EmployeeId", 45, SpmDbDfn.ColumnIdx.SwmEmployeeRole_EmployeeId, ColumnAlignment.Right);
					break;
				case SpmEmployeeRole.Column.Role:
					SetEmployeeRoleColDfn(columnDfn, "Role", 40, SpmDbDfn.ColumnIdx.SwmEmployeeRole_Role, ColumnAlignment.Center);
					break;
				case SpmEmployeeRole.Column.ApplicationFrom:
					SetEmployeeRoleColDfn(columnDfn, "ApplicationFrom", 70, SpmDbDfn.ColumnIdx.SwmEmployeeRole_ApplicFrom, ColumnAlignment.Center, DataValue.DataType.Date);
					columnDfn.DateFormat = "d-MMM-yy";
					break;
				case SpmEmployeeRole.Column.ApplicationTo:
					SetEmployeeRoleColDfn(columnDfn, "ApplicationTo", 70, SpmDbDfn.ColumnIdx.SwmEmployeeRole_ApplicTo, ColumnAlignment.Center, DataValue.DataType.Date);
					columnDfn.DateFormat = "d-MMM-yy";
					break;

				// Common properties.
				case SpmEmployeeRole.Column.Notes:
					SetEmployeeRoleColDfn(columnDfn, "Notes", 200, SpmDbDfn.ColumnIdx.SwmEmployeeRole_Notes);
					break;
				case SpmEmployeeRole.Column.Status:
					SetEmployeeRoleColDfn(columnDfn, "Status", 50, SpmDbDfn.ColumnIdx.SwmEmployeeRole_Status, ColumnAlignment.Center);
					break;
				case SpmEmployeeRole.Column.Status_Desc:
					SetEmployeeRoleColDfn(columnDfn, "Status", 50, SpmDbDfn.ColumnIdx.SwmEmployeeRole_Status, ColumnAlignment.Center);
					break;
				case SpmEmployeeRole.Column.Status_Ind:
					SetEmployeeRoleColDfn(columnDfn, "Status", 50, SpmDbDfn.ColumnIdx.SwmEmployeeRole_Status, ColumnAlignment.Center, DataValue.DataType.TriState);
					columnDfn.TriStateFormat = ColumnTriStateFormat.Lights;
					break;
				case SpmEmployeeRole.Column.CreateOn_Date:
					SetEmployeeRoleColDfn(columnDfn, "Created", 65, SpmDbDfn.ColumnIdx.SwmEmployeeRole_CreateOn, ColumnAlignment.Center, DataValue.DataType.Date);
					columnDfn.ReadOnly = true;
					break;
				case SpmEmployeeRole.Column.UpdateOn_Date:
					SetEmployeeRoleColDfn(columnDfn, "Updated", 65, SpmDbDfn.ColumnIdx.SwmEmployeeRole_UpdateOn, ColumnAlignment.Center, DataValue.DataType.Date);
					columnDfn.ReadOnly = true;
					break;
			}
			if (!String.IsNullOrEmpty(caption))
				columnDfn.Caption = caption;
			if (width > 0)
				columnDfn.Width = width;
			return columnDfn;
		}

		//-------------------------------------------------------------------
		// EmployeeRole query filter.
		public override List<string> GetEmployeeRoleQueryFilter(SpmEmployeeRole.Params prm)
		{
			List<String> filters = new List<String>();

			// EmployeeRole Id.
			String includedIds = prm.IncludedIds.Concat(",");
			if (!includedIds.IsEmpty())
				filters.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_Id, aliasEmployeeRole) + " IN (" + includedIds + ")");
			String excludedIds = prm.ExcludedIds.Concat(",");
			if (!excludedIds.IsEmpty())
				filters.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_Id, aliasEmployeeRole) + " NOT IN (" + excludedIds + ")");

			// Employee:
			if (SysId.IsValid(prm.EmployeeId))
				filters.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_EmployeeId, aliasEmployeeRole) + "=" + prm.EmployeeId.ToString());
			// Role:
			if ((int)prm.EmployeeRole > 0)
				filters.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_Role, aliasEmployeeRole) + "=" + ((int)prm.EmployeeRole).ToString());

			// Employee name.
			String initials = DbQuery.FormatForCondition(prm.Initials);
			String surname = DbQuery.FormatForCondition(prm.Surname);
			if (!StringUtil.IsEmpty(initials) || !StringUtil.IsEmpty(surname))
			{
				// Common database definitions.
				String aliasEmployee = "aEmp";
				String colEmployeeId = SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployee_Id, aliasEmployee);
				String colInitials = SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployee_Initials, aliasEmployee);
				String colSurname = SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployee_Surname, aliasEmployee);

				// Build sub query on employee.
				DbQuery qry = new DbQuery(Database.DbmsType);
				qry.Tables.Add(SpmDbDfn.GetTableName(SpmDbDfn.TableIdx.SwmEmployee), aliasEmployee);
				qry.Columns.Add(colEmployeeId);
				
				// Employee must match role.
				qry.Filters.Add(colEmployeeId + "=" + SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_EmployeeId, aliasEmployeeRole));
				if (!initials.IsEmpty())
					qry.Filters.Add(DbQuery.FormatFn_Left(colInitials, prm.Initials.Length) + "='" + initials + "'");
				if (!surname.IsEmpty())
					qry.Filters.Add(DbQuery.FormatFn_Left(colSurname, prm.Surname.Length) + "='" + surname + "'");
				filters.Add("EXISTS(" + qry.BuildQuery() + ")");
			}

			// Applicable dates.
			DateTime nullDate = new DateTime(1970, 1, 1);
			String colApplicFrom = SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_ApplicFrom, aliasEmployeeRole);
			String colApplicTo = SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_ApplicTo, aliasEmployeeRole);
			if (DateUtil.IsValid(prm.Application))
			{
				// Looking for roles that are applicable on the specified date.
				filters.Add("(" + colApplicFrom + " IS NULL OR " + colApplicFrom + "=" + DbQuery.FormatDateForCondition(nullDate) + " OR " + colApplicFrom + "<" + DbQuery.FormatDateForCondition(DateUtil.IncrementDate(prm.Application, 1)) + ")");
				filters.Add("(" + colApplicTo + " IS NULL OR " + colApplicTo + "=" + DbQuery.FormatDateForCondition(nullDate) + " OR " + colApplicTo + ">=" + DbQuery.FormatDateForCondition(prm.Application) + ")");
			}
			else if (DateUtil.IsValid(prm.ApplicationFrom) || DateUtil.IsValid(prm.ApplicationTo))
			{
				// Looking for roles that overlap with the specified date range.
				if (DateUtil.IsValid(prm.ApplicationFrom) && DateUtil.IsValid(prm.ApplicationTo))
				{
					// Both from and to dates specified.
					filters.Add("(" + colApplicFrom + " IS NULL OR " + colApplicFrom + "=" + DbQuery.FormatDateForCondition(nullDate) + " OR " + colApplicFrom + "<" + DbQuery.FormatDateForCondition(DateUtil.IncrementDate(prm.ApplicationTo, 1)) + ")");
					filters.Add("(" + colApplicTo + " IS NULL OR " + colApplicTo + "=" + DbQuery.FormatDateForCondition(nullDate) + " OR " + colApplicTo + ">=" + DbQuery.FormatDateForCondition(prm.ApplicationFrom) + ")");
				}
				else if (DateUtil.IsValid(prm.ApplicationFrom))
				{
					// Only 'from' date specified - Matches with ApplicTo not specified or after 'from' date.
					filters.Add("(" + colApplicTo + " IS NULL OR " + colApplicTo + "=" + DbQuery.FormatDateForCondition(nullDate) + " OR " + colApplicTo + ">=" + DbQuery.FormatDateForCondition(prm.ApplicationFrom) + ")");
				}
				else if (DateUtil.IsValid(prm.ApplicationTo))
				{
					// Only 'to' date specified - Matches with ApplicFrom not specified or before 'to' date.
					filters.Add("(" + colApplicFrom + " IS NULL OR " + colApplicFrom + "=" + DbQuery.FormatDateForCondition(nullDate) + " OR " + colApplicFrom + "<" + DbQuery.FormatDateForCondition(DateUtil.IncrementDate(prm.ApplicationTo, 1)) + ")");
				}
			}


			//---------------------------------------------------------------
			// Common Properties.

			if (filters.Count < 1) filters.Add("1=1");
			return filters;
		}

		//-------------------------------------------------------------------
		// EmployeeRole sort columns.
		public List<String> GetEmployeeRoleSortColumns(SpmEmployeeRole.Params prm)
		{
			// Sort sequence:
			List<String> sortColumnNames = new List<String>();
			foreach (var columnDfn in prm.SortColumns)
			{
				// Need to ensure correct alias used for EmployeeRole columns in case of conflict.
				String sortCol = String.Empty;
				if (SpmDbDfn.GetTableForColumn((SpmDbDfn.ColumnIdx)columnDfn.DbColumn) == SpmDbDfn.TableIdx.SwmEmployeeRole)
				{
					sortCol = SpmDbDfn.GetColumnNameQual((SpmDbDfn.ColumnIdx)columnDfn.DbColumn, aliasEmployeeRole);
				}
				else
				{
					sortCol = columnDfn.DataName;
					if (!StringUtil.IsEmpty(columnDfn.SortDataName))
						sortCol = columnDfn.SortDataName;
				}
				if (!sortCol.IsEmpty())
				{
					DbOrderByNullMode orderByNullMode = DbOrderByNullMode.Default; // eSaOrderByDemoteNulls, eSaOrderByPromoteNulls
					sortColumnNames.Add(DbQuery.FormatForOrderBy(sortCol, columnDfn.SortAscending, orderByNullMode).Concat(", "));
				}
			}
			sortColumnNames.RemoveBlanks();
			if (sortColumnNames.IsEmpty())
			{
				// Default sort columns:
				//sortColumnNames.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_Type, aliasEmployeeRole) + " ASC");
			}
			return sortColumnNames;
		}

		//-------------------------------------------------------------------
		// EmployeeRole count.
		private long GetEmployeeRoleCount(String filter)
		{
			ClearErrorState();
			return Database.GetRowCount(SpmDbDfn.GetTableName(SpmDbDfn.TableIdx.SwmEmployeeRole) + " As " + aliasEmployeeRole, filter);
		}
		public override long GetEmployeeRoleCount(SpmEmployeeRole.Params prm)
		{
			ClearErrorState();
			return GetEmployeeRoleCount(GetEmployeeRoleQueryFilter(prm).Concat(" AND ", "(", ")"));
		}

		//-------------------------------------------------------------------
		// EmployeeRole list.
		public override List<SpmEmployeeRole> GetEmployeeRoleList(SpmEmployeeRole.Params prm)
		{
			List<SpmEmployeeRole> EmployeeRolees = new List<SpmEmployeeRole>();
			DbQuery qry = new DbQuery(Database.DbmsType);
			qry.Tables.Add(SpmDbDfn.GetTableName(SpmDbDfn.TableIdx.SwmEmployeeRole), aliasEmployeeRole);
			qry.Columns.AddRange(SwmEmployeeRole_Db.Fields);
			qry.Filters.AddRange(GetEmployeeRoleQueryFilter(prm));
			// Query data.
			using (var dbConnection = Database.CreateConnection())
			using (var dbCommand = dbConnection.CreateCommand())
			{
				try
				{
					dbConnection.Open();
					dbCommand.CommandText = qry.BuildQuery();
					using (DbDataReader dbDataReader = dbCommand.ExecuteReader())
					{
						while (dbDataReader.Read())
						{
							SwmEmployeeRole_Db dbEmployeeRole = new SwmEmployeeRole_Db(DbInfo);
							dbEmployeeRole.PopulateFrom(dbDataReader);
							EmployeeRolees.Add(CreateEmployeeRole(dbEmployeeRole));
						}
					}
				}
				catch (Exception exc)
				{
					Logger.Warn(GetType().Name + ".GetEmployeeRoleList\n\tQuery: " + dbCommand.CommandText + "\n\tException: " + exc.Message);
				}
			}
			return EmployeeRolees;
		}

		//-------------------------------------------------------------------
		// EmployeeRole query execution.
		public override DbResultSet ExecuteEmployeeRoleQuery(List<ColumnDfn> columns, SpmEmployeeRole.Params prm)
		{
			ClearErrorState();

			//---------------------------------------------------------------
			// Construct query.
			DbQuery query = new DbQuery(Database.DbmsType);
			query.Tables.Add(SpmDbDfn.GetTableName(SpmDbDfn.TableIdx.SwmEmployeeRole), aliasEmployeeRole);

			// EmployeeRole Properties - add columns as defined in query list.
			if (columns.HasId((int)SpmEmployeeRole.Column.Id))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_Id, aliasEmployeeRole));
			if (columns.HasId((int)SpmFacility.Column.ApplicFrom))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmFacility_ApplicFrom, aliasFacility));
			if (columns.HasId((int)SpmFacility.Column.ApplicTo))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmFacility_ApplicTo, aliasFacility));

			// Common Properties
			if (columns.HasId((int)SpmEmployeeRole.Column.Notes))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_Notes, aliasEmployeeRole));
			if (columns.HasId((int)SpmEmployeeRole.Column.Status) || columns.HasId((int)SpmEmployeeRole.Column.Status_Desc) || columns.HasId((int)SpmEmployeeRole.Column.Status_Ind))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_Status, aliasEmployeeRole));
			if (columns.HasId((int)SpmEmployeeRole.Column.CreateOn_Date))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_CreateOn, aliasEmployeeRole));
			if (columns.HasId((int)SpmEmployeeRole.Column.UpdateOn_Date))
				query.Columns.Add(SpmDbDfn.GetColumnNameQual(SpmDbDfn.ColumnIdx.SwmEmployeeRole_UpdateOn, aliasEmployeeRole));

			//---------------------------------------------------------------
			// Populate filter.
			query.Filters.AddRange(GetEmployeeRoleQueryFilter(prm));

			if (prm.IncludedIds.Count != 1)
			{
				// Configure sort sequence.
				foreach (String sortColumn in GetEmployeeRoleSortColumns(prm))
					query.OrderBy.Add(sortColumn);
			}

			//---------------------------------------------------------------
			//return new DbResultSet_DataTableReader(Database, query.BuildQuery());
			return new Sarand.Win.Dbas.Data.DbResultSet_DataReader(Database, query.BuildQuery());
		}
		
		//-------------------------------------------------------------------
	}
	//=======================================================================
}