wehub-resource-sync
103 lines
3.7 KiB
C#
103 lines
3.7 KiB
C#
/*
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* QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
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* Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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using System;
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using QuantConnect.Data;
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using QuantConnect.Interfaces;
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using QuantConnect.Data.Market;
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using System.Collections.Generic;
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using QuantConnect.Data.Auxiliary;
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namespace QuantConnect.Lean.Engine.DataFeeds.Enumerators
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{
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/// <summary>
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/// Event provider who will emit <see cref="SymbolChangedEvent"/> events
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/// </summary>
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public class MappingEventProvider : ITradableDateEventProvider
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{
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private IMapFileProvider _mapFileProvider;
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/// <summary>
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/// The associated configuration
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/// </summary>
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protected SubscriptionDataConfig Config { get; private set; }
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/// <summary>
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/// The current instance being used
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/// </summary>
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protected MapFile MapFile { get; private set; }
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/// <summary>
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/// Initializes this instance
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/// </summary>
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/// <param name="config">The <see cref="SubscriptionDataConfig"/></param>
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/// <param name="factorFileProvider">The factor file provider to use</param>
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/// <param name="mapFileProvider">The <see cref="Data.Auxiliary.MapFile"/> provider to use</param>
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/// <param name="startTime">Start date for the data request</param>
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public virtual void Initialize(
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SubscriptionDataConfig config,
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IFactorFileProvider factorFileProvider,
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IMapFileProvider mapFileProvider,
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DateTime startTime)
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{
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_mapFileProvider = mapFileProvider;
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Config = config;
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InitializeMapFile();
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if (MapFile.HasData(startTime.Date))
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{
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// initialize mapped symbol using request start date
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Config.MappedSymbol = MapFile.GetMappedSymbol(startTime.Date, Config.MappedSymbol, Config.DataMappingMode);
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}
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}
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/// <summary>
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/// Check for new mappings
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/// </summary>
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/// <param name="eventArgs">The new tradable day event arguments</param>
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/// <returns>New mapping event if any</returns>
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public virtual IEnumerable<BaseData> GetEvents(NewTradableDateEventArgs eventArgs)
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{
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if (Config.Symbol == eventArgs.Symbol
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&& MapFile.HasData(eventArgs.Date))
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{
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var old = Config.MappedSymbol;
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var newSymbol = MapFile.GetMappedSymbol(eventArgs.Date, Config.MappedSymbol, Config.DataMappingMode);
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Config.MappedSymbol = newSymbol;
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// check to see if the symbol was remapped
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if (old != Config.MappedSymbol)
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{
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var changed = new SymbolChangedEvent(
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Config.Symbol,
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eventArgs.Date,
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old,
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Config.MappedSymbol);
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yield return changed;
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}
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}
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}
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/// <summary>
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/// Initializes the map file to use
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/// </summary>
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protected void InitializeMapFile()
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{
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MapFile = _mapFileProvider.ResolveMapFile(Config);
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}
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}
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}
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