// ========================================================================
// 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;

namespace Volian.Object.Library
{
	/// <summary>
	///	GroupMemberships Generated by MyGeneration using the CSLA Object Mapping template
	/// </summary>
	[Serializable()]
	public partial class GroupMemberships : BusinessListBase<GroupMemberships,GroupMembership>
	{
    #region Business Methods

    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 void Add(int uid)
    {
      if (!Contains(uid))
      {
        GroupMembership membership =
          GroupMembership.New(uid);
        this.Add(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;
      // 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);
      }
      this.RaiseListChangedEvents = true;
    }

    #endregion

	} // Class
} // Namespace