using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using Kreta.Framework;
using Kreta.Framework.Collections;
using Kreta.Framework.Collections.Generic;
using Kreta.Framework.Entities;
using Kreta.Framework.Entities.Associations;
using Kreta.Framework.Entities.Generic;

namespace SDA.Kreta.Entities
{
    internal sealed class KepesitesDBHelper : EntityDBHelper<Kepesites>
    {
        private Dictionary<string, string> dynamicColumns = new Dictionary<string, string>()
        {
            { "KepesitesTipusId", "T_KEPESITES_OSSZES.C_KEPESITESTIPUSID" },
        };

        private const string dynamicQueryCommandText =
            "select " +
                "T_KEPESITES_OSSZES.ID, " +
                "{COLUMNS}" +
                // Kepesites betöltése
                // Kepesites kapcsoló mezői
                "T_KEPESITES_OSSZES.C_INTEZMENYID, " + /* Kötelező asszociációs kapcsolómező */
                "T_KEPESITES_OSSZES.C_TANEVID, " + /* Kötelező asszociációs kapcsolómező */
                "T_KEPESITES_OSSZES.TOROLT, " +
                "T_KEPESITES_OSSZES.SERIAL, " +
                "T_KEPESITES_OSSZES.CREATED, " +
                "T_KEPESITES_OSSZES.CREATOR, " +
                "T_KEPESITES_OSSZES.LASTCHANGED, " +
                "T_KEPESITES_OSSZES.MODIFIER " +
            "from " +
                "T_KEPESITES_OSSZES " +
            "where " +
                "(1 = 1) ";

        private const string emptyQueryCommandText =
            "select " +
                "T_KEPESITES_OSSZES.ID, " +
                // Kepesites betöltése
                // Kepesites mezői
                "T_KEPESITES_OSSZES.C_KEPESITESTIPUSID, " +
                // Kepesites kapcsoló mezői
                "T_KEPESITES_OSSZES.C_INTEZMENYID, " + /* Kötelező asszociációs kapcsolómező */
                "T_KEPESITES_OSSZES.C_TANEVID, " + /* Kötelező asszociációs kapcsolómező */
                "T_KEPESITES_OSSZES.TOROLT, " +
                "T_KEPESITES_OSSZES.SERIAL, " +
                "T_KEPESITES_OSSZES.CREATED, " +
                "T_KEPESITES_OSSZES.CREATOR, " +
                "T_KEPESITES_OSSZES.LASTCHANGED, " +
                "T_KEPESITES_OSSZES.MODIFIER " +
            "from " +
                "T_KEPESITES_OSSZES " +
            "where " +
                "(1 = 1) ";

        public override string EmptyQueryCommandText
        {
            get
            {
                return emptyQueryCommandText;
            }
        }

        public override string DynamicQueryCommandText
        {
            get
            {
                return dynamicQueryCommandText;
            }
        }

        public override IDictionary<string, string> DynamicColumns
        {
            get
            {
                return dynamicColumns;
            }
        }

        protected override Kepesites CreateEntityInstance()
        {
            return Kepesites.GiveAnInstance();
        }

        #region Lekérdezés

        public override void LoadEntityFields(Kepesites entity, SDA.DataProvider.SDADataReader reader)
        {
            // Kepesites betöltése
            // Kepesites mezői

            entity.m_KepesitesTipusId = DAUtil.ReadIntegerAttribute(reader, 1);

            // Kepesites kapcsoló mezői
            DAUtil.ReadIDAttribute(reader, 2, ref entity.m_IntezmenyId, 0);
            DAUtil.ReadIDAttribute(reader, 3, ref entity.m_TanevId, 0);
        }

        public override void LoadEntityFields(Kepesites entity, SDA.DataProvider.SDADataReader reader, ColumnFilterMode columnFilterMode, IEnumerable<string> columns)
        {
            int index = 1;
            if (columns == null)
            {
                columns = new List<string>(index);
            }
            // Kepesites betöltése
            // Kepesites mezői
            if (((columnFilterMode == ColumnFilterMode.DEFAULT_ALLOWED) ^ (columns.Contains("KepesitesTipusId"))))
            {
                entity.m_KepesitesTipusId = DAUtil.ReadIntegerAttribute(reader, index++);
            }
            // Kepesites kapcsoló mezői
            DAUtil.ReadIDAttribute(reader, index++, ref entity.m_IntezmenyId, 0);
            DAUtil.ReadIDAttribute(reader, index++, ref entity.m_TanevId, 0);
        }

        #endregion

        #region Paraméter kötés

        public override void BindAttributes(Kepesites entity, SDA.DataProvider.SDACommand command)
        {
            DAUtil.BindParameter(command, "pKEPESITESTIPUSID", SDA.DataProvider.SDADBType.Int /* DictionaryItem */, 15, entity.m_KepesitesTipusId, entity.m_KepesitesTipusId == null);
        }

        public override void DynamicBindAttributes(Kepesites entity, SDA.DataProvider.SDACommand command)
        {
            System.Text.StringBuilder sb = new System.Text.StringBuilder();
            if (entity.HasChanged("KepesitesTipusId"))
            {
                sb.Append("C_KEPESITESTIPUSID = :pKEPESITESTIPUSID,");

                DAUtil.BindParameter(command, "pKEPESITESTIPUSID", SDA.DataProvider.SDADBType.Int /* DictionaryItem */, 15, entity.m_KepesitesTipusId, entity.m_KepesitesTipusId == null);

            }
            command.CommandText = command.CommandText.Replace("{COLUMNS}", sb.ToString());
        }

        public override void BindAssociations(Kepesites entity, SDA.DataProvider.SDACommand command)
        {
            DAUtil.BindIdParameter(command, "pINTEZMENYID", entity.InternalIntezmenyId);
            DAUtil.BindIdParameter(command, "pTANEVID", entity.InternalTanevId);
        }

        #endregion
    }

    internal class KepesitesDA : EntityDataAccessor<Kepesites>
    {
        private static KepesitesDBHelper m_dbhelper = new KepesitesDBHelper();

        protected override IEntityDBHelper<Kepesites> dbhelper
        {
            get { return m_dbhelper; }
        }

        #region Load

        public override bool LoadEntity(Kepesites entity, int entityId)
        {
            return LoadById(entity, entityId);
        }

        public override bool FilteredLoadEntity(Kepesites entity, int entityId, ColumnFilterMode columnFilterMode, IEnumerable<string> columns)
        {
            return LoadById(entity, entityId, columnFilterMode, columns);
        }

        public bool LoadById(Kepesites entity, int entityId)
        {
            using (SDA.DataProvider.SDACommand command = dbhelper.CreateEmptyQueryCommand())
            {
                command.CommandText += " and (T_KEPESITES_OSSZES.ID = :pID) ";
                command.Parameters.Add("pID", SDA.DataProvider.SDADBType.Int).Value = entityId;
                return dbhelper.LoadSingleEntity(entity, command);
            }
        }

        public bool LoadById(Kepesites entity, int entityId, ColumnFilterMode columnFilterMode, IEnumerable<string> columns)
        {
            using (SDA.DataProvider.SDACommand command = dbhelper.CreateDynamicQueryCommand(columnFilterMode, columns))
            {
                command.CommandText += " and (T_KEPESITES_OSSZES.ID = :pID) ";
                command.Parameters.Add("pID", SDA.DataProvider.SDADBType.Int).Value = entityId;
                return dbhelper.LoadSingleEntity(entity, command, columnFilterMode, columns);
            }
        }

        [Obsolete("Ezt ne használjátok, mert mindenhova bele kellene fogalmazni a tanév szűrést is! Meg fog majd szűnni!")]
        public override void LoadWithFilter(IEntityCollection<Kepesites> collection, string filter, Dictionary<string, object> commandParameters = null)
        {
            using (SDA.DataProvider.SDACommand command = dbhelper.CreateEmptyQueryCommand())
            {
                command.CommandText += filter;
                dbhelper.CreateParameterBinding(command, commandParameters);
                dbhelper.LoadEntityCollection(collection, command);
            }
        }

        [Obsolete("Ezt ne használjátok, mert mindenhova bele kellene fogalmazni a tanév szűrést is! Meg fog majd szűnni!")]
        public override void LoadWithFilter(IEntityCollection<Kepesites> collection, string filter, ColumnFilterMode columnFilterMode, IEnumerable<string> columns, Dictionary<string, object> commandParameters = null)
        {
            using (SDA.DataProvider.SDACommand command = dbhelper.CreateDynamicQueryCommand(columnFilterMode, columns))
            {
                command.CommandText += filter;
                dbhelper.CreateParameterBinding(command, commandParameters);
                dbhelper.LoadEntityCollection(collection, command, columnFilterMode, columns);
            }
        }

        #endregion

        #region InsertEntity

        private const string m_InsertCommandText = @"
        insert into T_KEPESITES_OSSZES (
            C_KEPESITESTIPUSID,
            C_INTEZMENYID,
            C_TANEVID,
            TOROLT,
            SERIAL,
            CREATED,
            CREATOR)
        values (
            :pKEPESITESTIPUSID,
            :pINTEZMENYID,
            :pTANEVID,
            :pTOROLT,
            :pSERIAL,
            :pCREATED,
            :pCREATOR);

        SELECT SCOPE_IDENTITY() as ID;

        ";

        public override void InsertEntity(Kepesites entity)
        {
            entity.Serial = 0;
            SetEntityCreator(entity, DateTime.Now, UserContext.Instance.UniqueIdentifier);

            using (SDA.DataProvider.SDACommand command = DAUtil.CreateCommand(m_InsertCommandText))
            {
                dbhelper.BindAttributes(entity, command);
                dbhelper.BindAssociations(entity, command);
                command.Parameters.Add("pTOROLT", SDA.DataProvider.SDADBType.Boolean /* Boolean */).Value = false;
                command.Parameters.Add("pSERIAL", SDA.DataProvider.SDADBType.Int).Value = 0;
                command.Parameters.Add("pCREATED", SDA.DataProvider.SDADBType.DateTime).Value = entity.EntityCreated;
                command.Parameters.Add("pCREATOR", SDA.DataProvider.SDADBType.Int).Value = entity.EntityCreator;
                entity.ID = Convert.ToInt32(command.ExecuteScalar());

            }
        }

        #endregion

        #region UpdateEntity

        private const string m_UpdateAttributesCommandText = @"
        update T_KEPESITES_OSSZES
        set
          {COLUMNS}
          SERIAL = ISNULL(SERIAL,0) + 1,
          LASTCHANGED = :pLASTCHANGED,
          MODIFIER = :pMODIFIER,
          TOROLT = :pTOROLT
        where
          (ID = :pID) and (ISNULL(SERIAL,0) = :pSERIAL)
        ";

        public override bool UpdateEntity(Kepesites entity)
        {
            using (SDA.DataProvider.SDACommand command = DAUtil.CreateCommand(m_UpdateAttributesCommandText))
            {
                bool result = true;
                dbhelper.DynamicBindAttributes(entity, command);

                SetEntityModifier(entity, DateTime.Now, UserContext.Instance.UniqueIdentifier);

                command.Parameters.Add("pID", SDA.DataProvider.SDADBType.Int).Value = entity.ID;
                command.Parameters.Add("pSERIAL", SDA.DataProvider.SDADBType.Int).Value = entity.Serial;
                command.Parameters.Add("pLASTCHANGED", SDA.DataProvider.SDADBType.DateTime).Value = entity.EntityLastChanged;
                command.Parameters.Add("pMODIFIER", SDA.DataProvider.SDADBType.Int).Value = entity.EntityModifier;
                command.Parameters.Add("pTOROLT", SDA.DataProvider.SDADBType.Boolean /* Boolean */).Value = entity.Torolt;

                result = (command.ExecuteNonQuery() == 1);
                if (result == true)
                    entity.Serial++;

                return result;
            }
        }

        #endregion

        #region DeleteEntity

        private const string m_FizikaiDeleteCommandText = @"DELETE FROM T_KEPESITES_OSSZES WHERE (ID = :pID) ";
        private const string m_LogikaiDeleteCommandText = @"
        UPDATE T_KEPESITES_OSSZES 
        SET TOROLT = 'T' ,
          SERIAL = SERIAL + 1,
          LASTCHANGED = :pLASTCHANGED,
          MODIFIER = :pMODIFIER
        WHERE (ID = :pID) ";

        public override void DeleteEntity(Kepesites entity, bool logikai = true)
        {
            var _deleteCommandText = logikai ? m_LogikaiDeleteCommandText : m_FizikaiDeleteCommandText;
            using (SDA.DataProvider.SDACommand command = DAUtil.CreateCommand(_deleteCommandText))
            {
                command.Parameters.Add("pID", SDA.DataProvider.SDADBType.Int).Value = entity.ID;

                if (logikai)
                {
                    DateTime lastchanged = DateTime.Now;
                    var modifier = UserContext.Instance.UniqueIdentifier;

                    command.Parameters.Add("pLASTCHANGED", SDA.DataProvider.SDADBType.DateTime).Value = lastchanged;
                    command.Parameters.Add("pMODIFIER", SDA.DataProvider.SDADBType.Int).Value = modifier;
                }

                if (command.ExecuteNonQuery() != 1)
                {
                    throw new EntityNotFoundException("Kepesites", entity.ID);
                }
            }

        }

        #endregion

        #region UpdateAssociations

        private const string m_UpdateAssociationCommandText = @"
        update T_KEPESITES_OSSZES
        set
            C_INTEZMENYID = :pINTEZMENYID,
            C_TANEVID = :pTANEVID,
            SERIAL = ISNULL(SERIAL,0) + 1,
            LASTCHANGED = :pLASTCHANGED,
            MODIFIER = :pMODIFIER
        where
          (ID = :pID) and (ISNULL(SERIAL,0) = :pSERIAL)
        ";

        public override bool UpdateAssociations(Kepesites entity)
        {
            using (SDA.DataProvider.SDACommand command = DAUtil.CreateCommand(m_UpdateAssociationCommandText))
            {
                dbhelper.BindAssociations(entity, command);

                DateTime lastchanged = DateTime.Now;
                var modifier = UserContext.Instance.UniqueIdentifier;

                command.Parameters.Add("pID", SDA.DataProvider.SDADBType.Int).Value = entity.ID;
                command.Parameters.Add("pSERIAL", SDA.DataProvider.SDADBType.Int).Value = entity.Serial;
                command.Parameters.Add("pLASTCHANGED", SDA.DataProvider.SDADBType.DateTime).Value = lastchanged;
                command.Parameters.Add("pMODIFIER", SDA.DataProvider.SDADBType.Int).Value = modifier;

                bool result = (command.ExecuteNonQuery() == 1);
                if (result == true)
                {
                    entity.Serial++;
                    SetEntityModifier(entity, lastchanged, modifier);
                }
                return result;
            }
        }

        #endregion

        #region Asszociációkkal kapcsolatos adatbázisműveletek (entitásspecifikus)

        #region Mint asszociációs osztály
        #endregion


        #endregion
    }


    /// <summary>
    /// Az osztály elvégzi az UML modell 'Vegzettseg -> Kepesites (Kepesites)'
    /// asszociációjának teljes kezelését.
    /// </summary>
    internal class Vegzettseg_Kepesites_DA : EntityCollectionDA<Vegzettseg, Kepesites>
    {
        internal protected Vegzettseg_Kepesites_DA(Vegzettseg owner)
            : base(owner)
        {
        }

        // Kapcsolótábla van
        private const string m_Filter = @" and (exists (select 1 from T_KEPESITES_VEGZETTSEG where C_KEPESITESID = T_KEPESITES_OSSZES.ID and C_VEGZETTSEGID = :pID)) ";

        public override void LoadCollection(IAssociatedEntityCollection<Kepesites> collection)
        {
            new KepesitesDBHelper().LoadByPartnerId(collection, m_Filter, Owner.ID);
        }

        private static SDA.DataProvider.SDACommand CreateInsertKepesitesCommand()
        {
            SDA.DataProvider.SDACommand result = new SDA.DataProvider.SDACommand();
            // kapcsolótábla van...
            result.CommandText = @"insert into T_KEPESITES_VEGZETTSEG (C_VEGZETTSEGID, C_KEPESITESID) values (:pVEGZETTSEGID, :pKEPESITESID)";
            result.Parameters.Add("pVEGZETTSEGID", SDA.DataProvider.SDADBType.Int);
            result.Parameters.Add("pKEPESITESID", SDA.DataProvider.SDADBType.Int);
            return result;
        }

        private void DoAdd(Vegzettseg owner, Kepesites partner)
        {
            using (SDA.DataProvider.SDACommand command = CreateInsertKepesitesCommand())
            {
                command.Connection = UserContext.Instance.SDAConnection;
                command.Transaction = UserContext.Instance.SDATransaction;
                command.Parameters["pVEGZETTSEGID"].Value = owner.ID;
                command.Parameters["pKEPESITESID"].Value = partner.ID;
                command.ExecuteNonQuery();
            }
        }

        public override void AddItem(Kepesites entity)
        {
            var assochandler = AssociationHandlerManager.Create<Kepesites, Vegzettseg>("Kepesites_Vegzettseg");
            assochandler.BeforeInsert(entity, this.Owner);
            this.DoAdd(this.Owner, entity);
            assochandler.AfterInsert(entity, this.Owner);
        }

        private static SDA.DataProvider.SDACommand CreateDeleteKepesitesCommand()
        {
            SDA.DataProvider.SDACommand result = new SDA.DataProvider.SDACommand();
            // kapcsolótábla van...
            result.CommandText = @"delete from T_KEPESITES_VEGZETTSEG where (C_VEGZETTSEGID = :pVEGZETTSEGID) and (C_KEPESITESID = :pKEPESITESID)";
            result.Parameters.Add("pVEGZETTSEGID", SDA.DataProvider.SDADBType.Int);
            result.Parameters.Add("pKEPESITESID", SDA.DataProvider.SDADBType.Int);
            return result;
        }

        private void DoRemove(Vegzettseg owner, Kepesites partner)
        {
            using (SDA.DataProvider.SDACommand command = CreateDeleteKepesitesCommand())
            {
                command.Connection = UserContext.Instance.SDAConnection;
                command.Transaction = UserContext.Instance.SDATransaction;
                command.Parameters["pVEGZETTSEGID"].Value = owner.ID;
                command.Parameters["pKEPESITESID"].Value = partner.ID;
                command.ExecuteNonQuery();
            }
        }

        public override void DeleteItem(Kepesites entity)
        {
            var assochandler = AssociationHandlerManager.Create<Kepesites, Vegzettseg>("Kepesites_Vegzettseg");
            assochandler.BeforeDelete(entity, this.Owner);
            this.DoRemove(this.Owner, entity);
            assochandler.AfterDelete(entity, this.Owner);
        }
    }

    /// <summary>
    /// Az osztály elvégzi az UML modell 'Intezmeny -> Kepesites (Kepesites)'
    /// asszociációjának teljes kezelését.
    /// </summary>
    internal class Intezmeny_Kepesites_DA : EntityCollectionDA<Intezmeny, Kepesites>
    {
        internal protected Intezmeny_Kepesites_DA(Intezmeny owner)
            : base(owner)
        {
        }

        // Nincs kapcsolótábla
        private const string m_Filter = @" and (T_KEPESITES_OSSZES.C_INTEZMENYID = :pID) ";

        public override void LoadCollection(IAssociatedEntityCollection<Kepesites> collection)
        {
            new KepesitesDBHelper().LoadByPartnerId(collection, m_Filter, Owner.ID);
        }

        private static SDA.DataProvider.SDACommand CreateInsertKepesitesCommand()
        {
            SDA.DataProvider.SDACommand result = new SDA.DataProvider.SDACommand();
            // nincs kapcsolótábla...
            result.CommandText = @"update T_KEPESITES_OSSZES set C_INTEZMENYID = :pINTEZMENYID where (ID = :pKEPESITESID)";
            result.Parameters.Add("pINTEZMENYID", SDA.DataProvider.SDADBType.Int);
            result.Parameters.Add("pKEPESITESID", SDA.DataProvider.SDADBType.Int);
            return result;
        }

        private void DoAdd(Intezmeny owner, Kepesites partner)
        {
            using (SDA.DataProvider.SDACommand command = CreateInsertKepesitesCommand())
            {
                command.Connection = UserContext.Instance.SDAConnection;
                command.Transaction = UserContext.Instance.SDATransaction;
                command.Parameters["pINTEZMENYID"].Value = owner.ID;
                command.Parameters["pKEPESITESID"].Value = partner.ID;
                command.ExecuteNonQuery();
            }
        }

        public override void AddItem(Kepesites entity)
        {
            var assochandler = AssociationHandlerManager.Create<Kepesites, Intezmeny>("Kepesites_Intezmeny");
            assochandler.BeforeInsert(entity, this.Owner);
            entity.ModifyIntezmeny(this.Owner);
            if (entity.State == EntityState.Modified)
            {
                entity.UpdateAssociations(true);
            }
            else
            {
                entity.Insert(true);
            }
            assochandler.AfterInsert(entity, this.Owner);
        }

        private static SDA.DataProvider.SDACommand CreateDeleteKepesitesCommand()
        {
            SDA.DataProvider.SDACommand result = new SDA.DataProvider.SDACommand();
            // nincs kapcsolótábla...
            result.CommandText = @"update T_KEPESITES_OSSZES set C_INTEZMENYID = null where (C_INTEZMENYID = :pINTEZMENYID and ID = :pKEPESITESID)";
            result.Parameters.Add("pINTEZMENYID", SDA.DataProvider.SDADBType.Int);
            result.Parameters.Add("pKEPESITESID", SDA.DataProvider.SDADBType.Int);
            return result;
        }

        private void DoRemove(Intezmeny owner, Kepesites partner)
        {
            using (SDA.DataProvider.SDACommand command = CreateDeleteKepesitesCommand())
            {
                command.Connection = UserContext.Instance.SDAConnection;
                command.Transaction = UserContext.Instance.SDATransaction;
                command.Parameters["pINTEZMENYID"].Value = owner.ID;
                command.Parameters["pKEPESITESID"].Value = partner.ID;
                command.ExecuteNonQuery();
            }
        }

        public override void DeleteItem(Kepesites entity)
        {
            var assochandler = AssociationHandlerManager.Create<Kepesites, Intezmeny>("Kepesites_Intezmeny");
            assochandler.BeforeDelete(entity, this.Owner);
            entity.Delete(true);
            assochandler.AfterDelete(entity, this.Owner);
        }
    }

    /// <summary>
    /// Az osztály elvégzi az UML modell 'Tanev -> Kepesites (Kepesites)'
    /// asszociációjának teljes kezelését.
    /// </summary>
    internal class Tanev_Kepesites_DA : EntityCollectionDA<Tanev, Kepesites>
    {
        internal protected Tanev_Kepesites_DA(Tanev owner)
            : base(owner)
        {
        }

        // Nincs kapcsolótábla
        private const string m_Filter = @" and (T_KEPESITES_OSSZES.C_TANEVID = :pID) ";

        public override void LoadCollection(IAssociatedEntityCollection<Kepesites> collection)
        {
            new KepesitesDBHelper().LoadByPartnerId(collection, m_Filter, Owner.ID);
        }

        private static SDA.DataProvider.SDACommand CreateInsertKepesitesCommand()
        {
            SDA.DataProvider.SDACommand result = new SDA.DataProvider.SDACommand();
            // nincs kapcsolótábla...
            result.CommandText = @"update T_KEPESITES_OSSZES set C_TANEVID = :pTANEVID where (ID = :pKEPESITESID)";
            result.Parameters.Add("pTANEVID", SDA.DataProvider.SDADBType.Int);
            result.Parameters.Add("pKEPESITESID", SDA.DataProvider.SDADBType.Int);
            return result;
        }

        private void DoAdd(Tanev owner, Kepesites partner)
        {
            using (SDA.DataProvider.SDACommand command = CreateInsertKepesitesCommand())
            {
                command.Connection = UserContext.Instance.SDAConnection;
                command.Transaction = UserContext.Instance.SDATransaction;
                command.Parameters["pTANEVID"].Value = owner.ID;
                command.Parameters["pKEPESITESID"].Value = partner.ID;
                command.ExecuteNonQuery();
            }
        }

        public override void AddItem(Kepesites entity)
        {
            var assochandler = AssociationHandlerManager.Create<Kepesites, Tanev>("Kepesites_Tanev");
            assochandler.BeforeInsert(entity, this.Owner);
            entity.ModifyTanev(this.Owner);
            if (entity.State == EntityState.Modified)
            {
                entity.UpdateAssociations(true);
            }
            else
            {
                entity.Insert(true);
            }
            assochandler.AfterInsert(entity, this.Owner);
        }

        private static SDA.DataProvider.SDACommand CreateDeleteKepesitesCommand()
        {
            SDA.DataProvider.SDACommand result = new SDA.DataProvider.SDACommand();
            // nincs kapcsolótábla...
            result.CommandText = @"update T_KEPESITES_OSSZES set C_TANEVID = null where (C_TANEVID = :pTANEVID and ID = :pKEPESITESID)";
            result.Parameters.Add("pTANEVID", SDA.DataProvider.SDADBType.Int);
            result.Parameters.Add("pKEPESITESID", SDA.DataProvider.SDADBType.Int);
            return result;
        }

        private void DoRemove(Tanev owner, Kepesites partner)
        {
            using (SDA.DataProvider.SDACommand command = CreateDeleteKepesitesCommand())
            {
                command.Connection = UserContext.Instance.SDAConnection;
                command.Transaction = UserContext.Instance.SDATransaction;
                command.Parameters["pTANEVID"].Value = owner.ID;
                command.Parameters["pKEPESITESID"].Value = partner.ID;
                command.ExecuteNonQuery();
            }
        }

        public override void DeleteItem(Kepesites entity)
        {
            var assochandler = AssociationHandlerManager.Create<Kepesites, Tanev>("Kepesites_Tanev");
            assochandler.BeforeDelete(entity, this.Owner);
            entity.Delete(true);
            assochandler.AfterDelete(entity, this.Owner);
        }
    }

}