///////////////////////////////////////////////////////////
//  Tasks.cs
//  Implementation of Class Tasks
//  CSLA type: Editable root collection 
//  Created on: 04-Nov-2004 
//  Object design: John  
//	Coded: John 04-Nov-2004 
///////////////////////////////////////////////////////////

using System;
using System.Data;
using CSLA.Data;
using GZTW.Data;
using CSLA;


namespace GZTW.AyaNova.BLL 
{
    /// <summary>
    /// Collection of <see cref="Task"/> objects 
    /// </summary>
	[Serializable]
	public class Tasks : BusinessCollectionBase 
	{
		#region Constructor
		
		//Private constructor prevents direction instantiation
		private Tasks()
		{
			AllowSort=false;
			AllowFind=true;
			AllowEdit=true;
			AllowNew=true;
			AllowRemove=true;

		}

		#endregion

		#region Business properties and methods
		/// <summary>
		/// Locale key so that generic list editor
		/// UI code knows what title to give the list in a
		/// grid
		/// </summary>
		public string LocaleKey
		{
			get
			{
				return "Task.Label.List";
			}
		}

		/// <summary>
		/// Retrieve Task by index
		/// </summary>
		/// <param name="Item">Index</param>
		public Task this[int Item]
		{
			get
			{
				return (Task) List[Item];

			}
		}
	
		

		/// <summary>
		/// Remove Task by passing it in
		/// </summary>
		/// <param name="obj"></param>
		public void Remove(Task obj)
		{
			List.Remove(obj);
		}

		/// <summary>
		/// Add a new Task to the collection
		/// </summary>
		
		public Task Add()
		{
			Task child=Task.NewItem();
			List.Add(child);
			return child;
		}
		/// <summary>
		/// Add Task by passing it in
		/// </summary>
		/// <param name="obj"></param>
		public void Add(Task obj)
		{
			List.Add(obj);
		}
        /// <summary>
        /// 
        /// </summary>
        /// <returns></returns>
		protected override object OnAddNew()
		{
			Task child=Task.NewItem();
			List.Add(child);
			return child;
		}	


		#endregion		

		#region Contains

		/// <summary>
		/// Check if item in collection
		/// </summary>
		/// <param name="obj"></param>
		public bool Contains(Task obj)
		{
			foreach (Task child in List)
			{
				if(child.Equals(obj)) return true;
			}
			return false;

		}

		

		/// <summary>
		/// Check if item in deleted collection
		/// </summary>
		/// <param name="obj"></param>
		public bool ContainsDeleted(Task obj)
		{
			foreach (Task child in deletedList)
			{
				if(child.Equals(obj)) return true;
			}
			return false;

		}

		
		#endregion

		#region Static methods
	

		/// <summary>
		/// Get item collection
		/// </summary>
		///
		/// <returns></returns>
		public static Tasks GetItems()
		{
			//in future specify criteria if filtering (e.g. filter by region)
			Tasks col = new Tasks();
			return (Tasks)DataPortal.Fetch(new Criteria());
			
		}

		
		#endregion	

		#region DAL DATA ACCESS

		/// <summary>
		/// Fetch children 
		/// </summary>
		/// <param name="Criteria"></param>
		protected override void DataPortal_Fetch(object Criteria)
		{
			Criteria crit = (Criteria)Criteria;
			SafeDataReader dr = null;				
			try
			{
				dr=DBUtil.GetReaderFromSQLString("SELECT * FROM aTask ORDER BY ANAME;");
				while(dr.Read()) 
				{						
					List.Add(Task.GetItem(dr));
				}			
					
			}
			finally
			{
				if(dr!=null) dr.Close();
			}
		}

		/// <summary>
		/// Editable Root Collection Update
		/// </summary>
		protected override void DataPortal_Update()
		{
			using (IDbConnection connection = DBUtil.DB.GetConnection())
			{
				connection.Open();
				IDbTransaction tr = connection.BeginTransaction();

				try
				{

					//update (thus deleting) any deleted child objects
					foreach (Task child in deletedList)
					{
						child.Update(tr);
					}

					//Now that they are deleted remove them from memory
					deletedList.Clear();

					foreach (Task child in List)
					{
						child.Update(tr);

					}
			
					tr.Commit();
				}
				catch
				{
					tr.Rollback();
					throw;//WAS: throw(ex);
				}
			}
		}
		#endregion

		#region criteria
		/// <summary>
		/// Criteria for identifying existing object
		/// </summary>
		[Serializable]
			private class Criteria
		{
			//public string ObjectName;
				
			public Criteria(/*string _ObjectName*/)
			{
				//ObjectName=_ObjectName;
			}
			
		}
		#endregion
		
	}//end Tasks

}//end namespace GZTW.AyaNova.BLL