// ========================================================================
// Copyright 2006 - Volian Enterprises, Inc. All rights reserved.          
// Volian Enterprises - Proprietary Information - DO NOT COPY OR DISTRIBUTE
// ------------------------------------------------------------------------
// $Workfile: $     $Revision: $                                           
// $Author: $   $Date: $                                                   
//                                                                         
// $History: $                                                             
// ========================================================================

using System;
using System.Data;
using System.Data.SqlClient;
using Csla;
using Csla.Data;
using System.Configuration;
using System.IO;

namespace Volian.CSLA.Library
{
	/// <summary>
	///	GroupMemberships Generated by MyGeneration using the CSLA Object Mapping template
	/// </summary>
	[Serializable()]
	public partial class GroupMemberships : BusinessListBase<GroupMemberships, GroupMembership>
	{
		#region Business Methods
		private string _errorMessage = string.Empty;
		public string ErrorMessage
		{
			get { return _errorMessage; }
		}
		// Many To Many
		public new GroupMembership this[int uid]
		{
			get
			{
				foreach (GroupMembership membership in this)
					if (membership.UID == uid)
						return membership;
				return null;
			}
		}
		public GroupMembership GetItem(int uid)
		{
			foreach (GroupMembership membership in this)
				if (membership.UID == uid)
					return membership;
			return null;
		}
		public GroupMembership Add(int uid)
		{
			if (!Contains(uid))
			{
				GroupMembership membership =	GroupMembership.New(uid);
				this.Add(membership);
				return membership;
			}
			else
				throw new InvalidOperationException("membership already exists");
		}
		public void Remove(int uid)
		{
			foreach (GroupMembership membership in this)
			{
				if (membership.UID == uid)
				{
					Remove(membership);
					break;
				}
			}
		}
		public bool Contains(int uid)
		{
			foreach (GroupMembership membership in this)
				if (membership.UID == uid)
					return true;
			return false;
		}
		public bool ContainsDeleted(int uid)
		{
			foreach (GroupMembership membership in DeletedList)
				if (membership.UID == uid)
					return true;
			return false;
		}
		#endregion
		#region Factory Methods
		internal static GroupMemberships New()
		{
			return new GroupMemberships();
		}
		internal static GroupMemberships Get(SafeDataReader dr)
		{
			return new GroupMemberships(dr);
		}
		private GroupMemberships()
		{
			MarkAsChild();
		}
		private GroupMemberships(SafeDataReader dr)
		{
			MarkAsChild();
			Fetch(dr);
		}
		#endregion
		#region Data Access Portal
		// called to load data from the database
		private void Fetch(SafeDataReader dr)
		{
			this.RaiseListChangedEvents = false;
			while (dr.Read())
				this.Add(GroupMembership.Get(dr));
			this.RaiseListChangedEvents = true;
		}
		internal void Update(Group group, SqlConnection cn)
		{
			this.RaiseListChangedEvents = false;
			try
			{
				// update (thus deleting) any deleted child objects
				foreach (GroupMembership obj in DeletedList)
					obj.DeleteSelf(group, cn);
				// now that they are deleted, remove them from memory too
				DeletedList.Clear();
				// add/update any current child objects
				foreach (GroupMembership obj in this)
				{
					if (obj.IsNew)
						obj.Insert(group, cn);
					else
						obj.Update(group, cn);
				}
			}
			finally
			{
				this.RaiseListChangedEvents = true;
			}
		}
		#endregion
	} // Class
} // Namespace