wehub-resource-sync
70 lines
2.4 KiB
C#
70 lines
2.4 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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using System;
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using System.Collections.Generic;
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using System.IO;
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namespace QuantConnect.ToolBox
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{
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/// <summary>
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/// Defines how to open/close a source file
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/// </summary>
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public interface IStreamProvider : IDisposable
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{
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/// <summary>
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/// Opens the specified source as read to be consumed stream
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/// </summary>
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/// <param name="source">The source file to be opened</param>
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/// <returns>The stream representing the specified source</returns>
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IEnumerable<Stream> Open(string source);
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/// <summary>
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/// Closes the specified source file stream
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/// </summary>
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/// <param name="source">The source file to be closed</param>
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void Close(string source);
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}
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/// <summary>
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/// Provides factor method for creating an <see cref="IStreamProvider"/> from a file name
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/// </summary>
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public static class StreamProvider
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{
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/// <summary>
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/// Creates a new <see cref="IStreamProvider"/> capable of reading a file with the specified extenson
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/// </summary>
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/// <param name="extension">The file extension</param>
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/// <returns>A new stream provider capable of reading files with the specified extension</returns>
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public static IStreamProvider ForExtension(string extension)
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{
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var ext = Path.GetExtension(extension);
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if (ext == ".zip")
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{
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return new ZipStreamProvider();
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}
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if (ext == ".bz2")
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{
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return new Bz2StreamProvider();
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}
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if (ext == ".gz")
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{
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return new GzipStreamProvider();
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}
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return new FileStreamProvider();
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}
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}
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} |