using System;

 using System.Text;

 using System.Collections.ObjectModel;

 namespace Aga.Controls.Tree

 {

 	public class TreePath

 	{

 		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes")]

 		public static readonly TreePath Empty = new TreePath();

 		private object[] _path;

 		public object[] FullPath

 		{

 			get { return _path; }

 		}

 		public object LastNode

 		{

 			get

 			{

 				if (_path.Length > 0)

 					return _path[_path.Length - 1];

 				else

 					return null;

 			}

 		}

 		public object FirstNode

 		{

 			get

 			{

 				if (_path.Length > 0)

 					return _path[0];

 				else

 					return null;

 			}

 		}

 		public TreePath()

 		{

 			_path = new object[0];

 		}

 		public TreePath(object node)

 		{

 			_path = new object[] { node };

 		}

 		public TreePath(object[] path)

 		{

 			_path = path;

 		}

 		public TreePath(TreePath parent, object node)

 		{

 			_path = new object[parent.FullPath.Length + 1];

 			for (int i = 0; i < _path.Length - 1; i++)

 				_path[i] = parent.FullPath[i];

 			_path[_path.Length - 1] = node;

 		}

 		public bool IsEmpty()

 		{

 			return (_path.Length == 0);

 		}

 	}

 }