// SimpleSet.cs
//
//  Copyright (C) 2008 IBBoard
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
//
//

using System;
using System.Collections;
using System.Collections.Generic;

namespace IBBoard.Collections
{
	public class SimpleSet<TYPE> : IEnumerable
	{		
		private Dictionary<int, TYPE> dictionary;
		
		public SimpleSet()
		{
			dictionary = new Dictionary<int,TYPE>();
		}
		
		public bool Add(TYPE val)
		{
			bool added = false;
			
			if (!dictionary.ContainsKey(val.GetHashCode()))
			{
				dictionary.Add(val.GetHashCode(), val);
				added = true;
			}
			
			return added;
		}
		
		public bool AddRange(ICollection<TYPE> vals)
		{
			bool added = false;
			
			foreach (TYPE val in vals)
			{
				Add(val);
				added = true;
			}
			
			return added;
		}
		
		public bool Remove(TYPE val)
		{
			return dictionary.Remove(val.GetHashCode());
		}
		
		public bool Contains (TYPE item)
		{
			return dictionary.ContainsKey(item.GetHashCode());
		}

		public void Clear ()
		{
			dictionary.Clear();
		}
		
		public int Count {
			get { return dictionary.Count; }
		}
		
		public bool IsReadOnly {
			get { return false; }
		}
		
		public IEnumerator GetEnumerator()
		{
			return dictionary.Values.GetEnumerator();
		}

	}
}