wehub-resource-sync
48 lines
2.1 KiB
C#
48 lines
2.1 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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namespace QuantConnect.Securities
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{
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/// <summary>
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/// Represents a type capable of fetching the holdings for the specified symbol
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/// </summary>
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public interface ISecurityProvider
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{
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/// <summary>
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/// Retrieves a summary of the holdings for the specified symbol
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/// </summary>
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/// <param name="symbol">The symbol to get holdings for</param>
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/// <returns>The holdings for the symbol or null if the symbol is invalid and/or not in the portfolio</returns>
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Security GetSecurity(Symbol symbol);
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}
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/// <summary>
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/// Provides extension methods for the <see cref="ISecurityProvider"/> interface.
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/// </summary>
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public static class SecurityProviderExtensions
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{
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/// <summary>
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/// Extension method to return the quantity of holdings, if no holdings are present, then zero is returned.
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/// </summary>
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/// <param name="provider">The <see cref="ISecurityProvider"/></param>
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/// <param name="symbol">The symbol we want holdings quantity for</param>
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/// <returns>The quantity of holdings for the specified symbol</returns>
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public static decimal GetHoldingsQuantity(this ISecurityProvider provider, Symbol symbol)
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{
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var security = provider.GetSecurity(symbol);
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return security == null ? 0 : security.Holdings.Quantity;
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}
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}
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} |