///////////////////////////////////////////////////////////
//  Implementation of Class ServiceBankCheckAlreadyBanked
//  CSLA type: Read-only object
//  Created on: 30-Sep-2009
//  Object design: John 
//	Coded: John 30-Sep-2009
///////////////////////////////////////////////////////////

using System;
using System.Data;
using CSLA.Data;
using GZTW.Data;
using CSLA;
using System.Threading;
using CSLA.Security;



namespace GZTW.AyaNova.BLL 
{
	/// <summary>
	/// Used internally to quickly check if a bank entry has already been made for the source object type and id
    /// and retrieve the bank ID if it is.  This is generally used to avoid concurrency issues (another user banks an object moments before the current user does etc)
    /// 
	/// </summary>
	[Serializable]
	public class ServiceBankCheckAlreadyBanked : ReadOnlyBase 
	{

		private Guid mBankID=Guid.Empty;
		
		#region Constructor	

		/// <summary>
		/// Private constructor to prevent direct instantiation
		/// </summary>
		private ServiceBankCheckAlreadyBanked()
		{			
		
		}
		#endregion

		
		#region Business properties
        /// <summary>
        /// ID of service bank entry if this object type and ID already has a bank entry
        /// </summary>
		public Guid BankID {get{return mBankID;}}
		#endregion
		
		#region Static methods
		
		/// <summary>
		/// Check if source object is already banked
		/// </summary>
		/// <param name="RootObjectID">ID of Bankable *source* object</param>
		/// <param name="RootObjectType">Type of *source* object</param>
		/// <returns>ID if already banked or Guid.Empty if not</returns>
		public static Guid GetBankID(Guid RootObjectID, RootObjectTypes RootObjectType)
		{
			
			return ((ServiceBankCheckAlreadyBanked)DataPortal.Fetch(new Criteria(RootObjectID,  RootObjectType))).mBankID;
						
		}

		

		
		#endregion

		#region DAL DATA ACCESS
		/// 
		/// <param Bool="Criteria"></param>
		protected override void DataPortal_Fetch(object Criteria)
		{
			Criteria crit = (Criteria)Criteria;		
			DBCommandWrapper cm = DBUtil.DB.GetSqlStringCommandWrapper(
				"SELECT AID " +
				"FROM aServiceBank WHERE (ASOURCEROOTOBJECTID " +
				"= @ID AND ASOURCEROOTOBJECTTYPE = @RootObjectType) "
				);
            cm.AddInParameter("@ID", DbType.Guid, crit.RootObjectID);
            cm.AddInParameter("@RootObjectType", DbType.Int16, (int)crit.RootObjectType);
            SafeDataReader dr = new SafeDataReader(DBUtil.DB.ExecuteReader(cm));

            mBankID = Guid.Empty;
			if(dr.Read())
			{
                mBankID=dr.GetGuid("AID");
			}
			dr.Close();
			
			
			
		}

		
		
		#endregion			

		#region criteria
		/// <summary>
		/// Criteria for identifying existing object
		/// </summary>
		[Serializable]
			private class Criteria
		{
			 
			public Guid RootObjectID;
			public RootObjectTypes RootObjectType;
			

			public Criteria(Guid _RootObjectID, RootObjectTypes _RootObjectType)
			{
				RootObjectID=_RootObjectID;
				RootObjectType=_RootObjectType;
				
			}
			
		}
		#endregion
		
	}//end Bool

}//end Boolspace GZTW.AyaNova.BLL