Enterprise Variables for WF4

//*****************************************************************************
//    Description.....WF4 Message Mediation Library
//                                
//    Author..........Roman Kiss, rkiss@pathcom.com
//    Copyright © 2010 ATZ Consulting Inc. (see included license.rtf file)         
//                        
//    Date Created:    09/09/10
//
//    Date        Modified By     Description
//-----------------------------------------------------------------------------
//    09/09/10    Roman Kiss     Initial Revision, based on MS Sequence activity
//
//*****************************************************************************
//
#region Namespaces
using System;
using System.Collections.ObjectModel;
#endregion

namespace RKiss.ActivityLib
{
    public class ValidatingCollection<T> : Collection<T>
    {
        // Methods
        protected override void ClearItems()
        {
            this.OnMutate();
            base.ClearItems();
        }

        protected override void InsertItem(int index, T item)
        {
            this.OnAdd(item);
            base.InsertItem(index, item);
        }

        private void OnAdd(T item)
        {
            if (this.OnAddValidationCallback != null)
            {
                this.OnAddValidationCallback(item);
            }
        }

        private void OnMutate()
        {
            if (this.OnMutateValidationCallback != null)
            {
                this.OnMutateValidationCallback();
            }
        }

        protected override void RemoveItem(int index)
        {
            this.OnMutate();
            base.RemoveItem(index);
        }

        protected override void SetItem(int index, T item)
        {
            this.OnAdd(item);
            this.OnMutate();
            base.SetItem(index, item);
        }

        // Properties
        public Action<T> OnAddValidationCallback { get; set; }


        public Action OnMutateValidationCallback { get; set; }

    }


   


}