///////////////////////////////////////////////////////////
//  Bool.cs
//  Implementation of Class BoolFetcher
//  CSLA type: Read-only object
//  Created on: 06-Dec-2004
//  Object design: John 
//	Coded: John Aug 4 2004
///////////////////////////////////////////////////////////

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



namespace GZTW.AyaNova.BLL
{
#pragma warning disable 1591
    /// <summary>
	/// Used to quickly fetch a single Bool record from the db
	/// </summary>
	[Serializable]
	public class BoolFetcher : ReadOnlyBase 
	{

		#region Attributes 		
		private bool mBoolValue;	

		#endregion

		#region Constructor	

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

		#region Business properties
		

		
		public bool BoolValue
		{
			get
			{
				return mBoolValue;
			}
			
		}
		
		#endregion

		#region System.Object overrides
		public override string ToString()
		{
			return mBoolValue.ToString();
		}

		/// 
		/// <param Bool="obj"></param>
		public override bool Equals(Object obj)
		{
			if ( obj == null || GetType ( ) != obj.GetType ( ) ) return false;
			BoolFetcher c=(BoolFetcher)obj;
			return mBoolValue==c.mBoolValue;
		}

		public override int GetHashCode()
		{
			return ("Bool" + mBoolValue.ToString()).GetHashCode();
		}

		#endregion

		#region Static methods
		

		/// <summary>
		/// 
		/// </summary>
		/// <param Bool="Table"></param>
		/// <param Bool="FieldBool"></param>
		/// <param Bool="RecordID"></param>
		/// <returns></returns>
		public static BoolFetcher GetItem(string Table, string FieldName, Guid RecordID)
		{
					
			return (BoolFetcher)DataPortal.Fetch(new Criteria( Table,  FieldName,  RecordID));
			
		}

		
		#endregion

		#region DAL DATA ACCESS
		/// 
		/// <param Bool="Criteria"></param>
		protected override void DataPortal_Fetch(object Criteria)
		{
			Criteria crit = (Criteria)Criteria;			
			try
			{
				//FireBird will return an int16 0 or 1 value
				//mssql will return a bool value
				//because this isn't using the datareader which converts automatically
				//but it's still faster to check here and use executescalar than
				//to convert this to use a data reader
				object o=DBUtil.GetScalarFromSQLString("SELECT " + AyaBizUtils.ToDBName(crit.FieldName) + " FROM "+ AyaBizUtils.ToDBName(crit.Table) +" WHERE aID=@ID",crit.RecordID);
				mBoolValue=System.Convert.ToBoolean(o);

				
			}
			catch(Exception ex)
			{
				
				throw new System.ArgumentException(
					string.Format(LocalizedTextTable.GetLocalizedTextDirect("Error.Object.NameFetcherNotFound")/*Name/bool Fetcher: Field {0} in table {1} with record ID {2} not found!*/,
					crit.FieldName,crit.Table,crit.RecordID.ToString()) + 
					"\r\n(" + ex.Message + ")");
			}
		}

		
		
		#endregion			

		#region criteria
		/// <summary>
		/// Criteria for identifying existing object
		/// </summary>
		[Serializable]
			private class Criteria
		{
			 
			public string Table;
			public string FieldName;
			public Guid RecordID;

			public Criteria(string _Table, string _FieldName, Guid _RecordID)
			{
				if(_Table=="User")
					_Table="aUser";
				Table=_Table;
				FieldName=_FieldName;
				RecordID=_RecordID;
			}
			
		}
		#endregion
		
	}//end Bool
#pragma warning restore 1591
}//end Boolspace GZTW.AyaNova.BLL