using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows.Media.Imaging;

using System.Windows.Media;

using System.IO;



namespace Microsoft.Research.DynamicDataDisplay.Charts.Maps

{

	public sealed class MemoryTileServer : TileServerBase, ITileSystem	{

		public MemoryTileServer(string name)

		{

			ServerName = name;

		}



		private readonly Dictionary<TileIndex, BitmapSource> cache = new Dictionary<TileIndex, BitmapSource>(new TileIndex.TileIndexEqualityComparer());



		public override bool Contains(TileIndex id)

		{

			return cache.ContainsKey(id);

		}



		public override void BeginLoadImage(TileIndex id)

		{

			if (Contains(id))

				ReportSuccess(cache[id], id);

			else

				ReportFailure(id);

		}



		public BitmapSource this[TileIndex id]

		{

			get

			{

				return cache[id];

			}

		}



		#region ITileStore Members



		public void BeginSaveImage(TileIndex id, BitmapSource image, Stream stream)

		{

			cache[id] = image;

		}



		#endregion



        #region ITileStore Members





        public void Clear()

        {

            throw new NotImplementedException();

        }



        #endregion

    }

}