36 lines
937 B
C#
36 lines
937 B
C#
// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
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using System;
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using System.Reactive.PlatformServices;
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namespace System.Reactive.Linq
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{
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internal static class QueryServices
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{
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private static Lazy<IQueryServices> s_services = new Lazy<IQueryServices>(Initialize);
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public static T GetQueryImpl<T>(T defaultInstance)
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{
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return s_services.Value.Extend(defaultInstance);
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}
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private static IQueryServices Initialize()
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{
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return PlatformEnlightenmentProvider.Current.GetService<IQueryServices>() ?? new DefaultQueryServices();
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}
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}
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internal interface IQueryServices
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{
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T Extend<T>(T baseImpl);
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}
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class DefaultQueryServices : IQueryServices
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{
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public T Extend<T>(T baseImpl)
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{
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return baseImpl;
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}
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}
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}
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