namespace Cerebrum.Data

{

	public class DataItemUnion : System.ComponentModel.Component, System.ComponentModel.IBindingList, System.ComponentModel.ISupportInitialize, System.ComponentModel.ITypedList

	{

		//private System.Collections.ArrayList Tables;

		private System.Collections.ArrayList Rows;

		public DataItemUnion()

		{

			//Tables = new System.Collections.ArrayList();

			Rows = new System.Collections.ArrayList();

		}



		public void Add(System.ComponentModel.IBindingList v)

		{

			int i;

			for (i=0; i <= v.Count- 1; i++)

			{

				this.Add(new Cerebrum.Data.DataItemView((System.ComponentModel.ICustomTypeDescriptor)v[i]));

			}

		}



		/*public void Add(System.Data.DataTable t)

		{

			this.Add(t.DefaultView);

		}



		public void Add(System.Data.DataTable[] t)

		{

			foreach (System.Data.DataTable tbl in t)

			{

				this.Add(tbl.DefaultView);

			}

		}*/



		public int Add(System.ComponentModel.ICustomTypeDescriptor r)

		{

			return this.Add(new Cerebrum.Data.DataItemView(r));

		}



		public void Add(System.ComponentModel.ICustomTypeDescriptor[] r)

		{

			foreach (System.ComponentModel.ICustomTypeDescriptor row in r)

			{

				this.Add(new Cerebrum.Data.DataItemView(row));

			}



		}



		public int Add(object value)

		{

			return this.Add((Cerebrum.Data.DataItemView)value);

		}





		int System.Collections.IList.Add(object value)

		{

			return this.Add((Cerebrum.Data.DataItemView)value);

		}



		protected int Add(Cerebrum.Data.DataItemView rv)

		{

			int i = Rows.Add(rv);

			if(_suspendCount == 0 && this.ListChanged!=null)

			{

				this.ListChanged(this, new System.ComponentModel.ListChangedEventArgs(System.ComponentModel.ListChangedType.ItemAdded, i));

			}

			return i;

		}



		int _suspendCount = 0;

		public void SuspendEvents()

		{

			_suspendCount ++;

		}

		public void ResumeEvents()

		{

			_suspendCount --;

			if(_suspendCount == 0)

			{

				Reset();

			}

		}



		public void Clear()

		{

			/*for(int i=Rows.Count-1;i>=0;i--)

			{

				RemoveAt(i);

			}*/

			Rows.Clear();

			Reset();

		}

		public void Reset()

		{

			if(_suspendCount == 0 && this.ListChanged!=null)

			{

				this.ListChanged(this, new System.ComponentModel.ListChangedEventArgs(System.ComponentModel.ListChangedType.Reset, -1));

			}

		}



		public bool Contains(object value)

		{

			return Rows.Contains(value);

		}



		public void CopyTo(System.Array array, int index)

		{

			Rows.CopyTo(array, index);

		}



		public int Count

		{

			get

			{

				return Rows.Count;

			}

		}



		public System.Collections.IEnumerator GetEnumerator()

		{

			return Rows.GetEnumerator();

		}



		public int IndexOf(object value)

		{

			return Rows.IndexOf(value);

		}



		public void Insert(int index, object value)

		{

			throw new System.NotSupportedException();

		}



		public bool IsSynchronized

		{

			get

			{

				return Rows.IsSynchronized;

			}

		}

 



		public object this[int index]

		{

			get

			{

				return Rows[index];

			}


			set

			{

				Rows[index] = value;

				if(_suspendCount == 0 && this.ListChanged!=null)

				{

					this.ListChanged(this, new System.ComponentModel.ListChangedEventArgs(System.ComponentModel.ListChangedType.ItemChanged, index));

				}

			}


		}



		public void Remove(object value)

		{

			int i = Rows.IndexOf(value);

			if(i>=0)

			{

				this.RemoveAt(i);

			}

		}



		public void RemoveAt(int index)

		{

			Rows.RemoveAt(index);

			if(_suspendCount == 0 && this.ListChanged!=null)

			{

				this.ListChanged(this, new System.ComponentModel.ListChangedEventArgs(System.ComponentModel.ListChangedType.ItemDeleted, index));

			}

		}



		public int Find(System.ComponentModel.PropertyDescriptor property, object key)

		{

			int i;

			System.Collections.IList s = Rows;

			for (i=0; i < s.Count; i++)

			{

				if (key.Equals(property.GetValue(s[i])))

				{

					return i;

				}



			}



			return -1;

		}



		#region IBindingList Members



		public void AddIndex(System.ComponentModel.PropertyDescriptor property)

		{

			// TODO:  Add DataView.AddIndex implementation

		}



		public bool AllowNew

		{

			get

			{

				// TODO:  Add DataView.AllowNew getter implementation

				return false;

			}

		}



		public void ApplySort(System.ComponentModel.PropertyDescriptor property, System.ComponentModel.ListSortDirection direction)

		{

			// TODO:  Add DataView.ApplySort implementation

		}



		public System.ComponentModel.PropertyDescriptor SortProperty

		{

			get

			{

				// TODO:  Add DataView.SortProperty getter implementation

				return null;

			}

		}



		public bool SupportsSorting

		{

			get

			{

				// TODO:  Add DataView.SupportsSorting getter implementation

				return false;

			}

		}



		public bool IsSorted

		{

			get

			{

				// TODO:  Add DataView.IsSorted getter implementation

				return false;

			}

		}



		public bool AllowRemove

		{

			get

			{

				// TODO:  Add DataView.AllowRemove getter implementation

				return true;

			}

		}



		public bool SupportsSearching

		{

			get

			{

				// TODO:  Add DataView.SupportsSearching getter implementation

				return true;

			}

		}



		public System.ComponentModel.ListSortDirection SortDirection

		{

			get

			{

				// TODO:  Add DataView.SortDirection getter implementation

				return System.ComponentModel.ListSortDirection.Ascending;

			}

		}



		public event System.ComponentModel.ListChangedEventHandler ListChanged;



		public bool SupportsChangeNotification

		{

			get

			{

				// TODO:  Add DataView.SupportsChangeNotification getter implementation

				return true;

			}

		}



		public void RemoveSort()

		{

			// TODO:  Add DataView.RemoveSort implementation

		}



		public object AddNew()

		{

			// TODO:  Add DataView.AddNew implementation

			return null;

		}



		public bool AllowEdit

		{

			get

			{

				// TODO:  Add DataView.AllowEdit getter implementation

				return false;

			}

		}



		public void RemoveIndex(System.ComponentModel.PropertyDescriptor property)

		{

			// TODO:  Add DataView.RemoveIndex implementation

		}



		#endregion



		#region IList Members



		public bool IsReadOnly

		{

			get

			{

				// TODO:  Add DataView.IsReadOnly getter implementation

				return false;

			}

		}



		public bool IsFixedSize

		{

			get

			{

				// TODO:  Add DataView.IsFixedSize getter implementation

				return false;

			}

		}



		#endregion



		#region ICollection Members



		public object SyncRoot

		{

			get

			{

				// TODO:  Add DataView.SyncRoot getter implementation

				return Rows.SyncRoot;

			}

		}



		#endregion



		#region ISupportInitialize Members



		public void BeginInit()

		{

			// TODO:  Add DataView.BeginInit implementation

		}



		public void EndInit()

		{

			// TODO:  Add DataView.EndInit implementation

		}



		#endregion



		protected System.ComponentModel.PropertyDescriptorCollection m_SelectedColumns = new System.ComponentModel.PropertyDescriptorCollection(new System.ComponentModel.PropertyDescriptor[0]);





		public string[] FieldNames

		{

			get

			{

				string [] names = new string[m_SelectedColumns.Count];

				for(int i=0;i<m_SelectedColumns.Count;i++)

				{

					names[i] = m_SelectedColumns[i].Name;

				}

				return names;

			}

			set

			{

				m_SelectedColumns.Clear();

				for(int i=0;i<value.Length;i++)

				{

					m_SelectedColumns.Add(new Cerebrum.Data.DataItemPropertyDescriptor(value[i]));

				}

			}

		}



		public string SelectedColumns

		{

			get

			{

				return System.String.Join(",", FieldNames);

			}

			set

			{

				FieldNames = value.Split(new char[]{','});

			}

		}

		#region ITypedList Members



		public System.ComponentModel.PropertyDescriptorCollection GetItemProperties(System.ComponentModel.PropertyDescriptor[] listAccessors)

		{

			/*if(Rows.Count>0)

			{

				DataItemView rv = Rows[0] as DataItemView;

				return rv.GetProperties(null);

			}*/

			return m_SelectedColumns;

		}



		public string GetListName(System.ComponentModel.PropertyDescriptor[] listAccessors)

		{

			return System.String.Empty;

		}



		#endregion

	}



}