using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;

using System.Windows.Media.Imaging;

using System.Windows.Media;



namespace Microsoft.Research.DynamicDataDisplay.Charts.Maps

{

	public abstract class ReadonlyTileServer : TileServerBase, IWriteableTileServer

	{

		private ReadonlyTileCache cache = new ReadonlyTileCache();

		public ReadonlyTileCache Cache

		{

			get { return cache; }

			protected set { cache = value; }

		} 



		public override bool Contains(TileIndex id)

		{

			return cache.Contains(id);

		}



		#region ITileStore Members



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

		{

			// do nothing

		}



        public void Clear()

        {

            // do nothing

        }



        #endregion

    }

}