MTP2.0_CSharp/Muchinfo.Common/Fx4.0/Mucinfo.NewWinChart/Easychart.Finance/Easychart.Finance.DataProvider/MemoryDataManager.cs

namespace Easychart.Finance.DataProvider
{
    using System;
    using System.Collections;

    public class MemoryDataManager : DataManagerBase
    {
        private static Hashtable htHistorical = new Hashtable();
        private static Hashtable htStreaming = new Hashtable();
        private DataManagerBase InnerDataManager;

        public MemoryDataManager(DataManagerBase InnerDataManager)
        {
            this.InnerDataManager = InnerDataManager;
        }

        public void AddNewPacket(DataPacket dp)
        {
            string symbol = dp.Symbol;
            if (symbol.EndsWith("=X"))
            {
                symbol = symbol.Substring(0, symbol.Length - 2);
            }
            CommonDataProvider empty = htStreaming[symbol] as CommonDataProvider;
            if (empty == null)
            {
                empty = CommonDataProvider.Empty;
                htStreaming[symbol] = empty;
            }
            empty.Merge(dp);
        }

        public override IDataProvider GetData(string Code, int Count)
        {
            CommonDataProvider empty = (CommonDataProvider) htHistorical[Code];
            if (empty == null)
            {
                if (this.InnerDataManager != null)
                {
                    this.InnerDataManager.StartTime = base.StartTime;
                    this.InnerDataManager.EndTime = base.EndTime;
                    empty = this.InnerDataManager[Code, Count] as CommonDataProvider;
                    empty.DataManager = this;
                }
                else
                {
                    empty = CommonDataProvider.Empty;
                }
                htHistorical[Code] = empty;
            }
            CommonDataProvider cdp = (CommonDataProvider) htStreaming[Code];
            if (cdp != null)
            {
                empty.Merge(cdp);
                cdp.ClearData();
            }
            empty.SetStringData("Code", Code);
            return empty;
        }

        public void RemoveSymbol(string Symbol)
        {
            htHistorical.Remove(Symbol);
            htStreaming.Remove(Symbol);
        }
    }
}