mcs/class/System.ComponentModel.Composition/src/Composition.Initialization/System/ComponentModel/Composition/ExportFactoryOfT.cs

   1 // -----------------------------------------------------------------------\r
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.\r
   3 // -----------------------------------------------------------------------\r
   4 using System;\r
   5 using Microsoft.Internal;\r
   6 using System.ComponentModel.Composition.Primitives;\r
   7 \r
   8 namespace System.ComponentModel.Composition\r
   9 {\r
  10     public class ExportFactory<T>\r
  11     {\r
  12         private Func<Tuple<T, Action>> _exportLifetimeContextCreator;\r
  13 \r
  14         public ExportFactory(Func<Tuple<T, Action>> exportLifetimeContextCreator)\r
  15         {\r
  16             if (exportLifetimeContextCreator == null)\r
  17             {\r
  18                 throw new ArgumentNullException("exportLifetimeContextCreator");\r
  19             }\r
  20 \r
  21             this._exportLifetimeContextCreator = exportLifetimeContextCreator;\r
  22         }\r
  23 \r
  24         public ExportLifetimeContext<T> CreateExport()\r
  25         {\r
  26             Tuple<T, Action> untypedLifetimeContext = this._exportLifetimeContextCreator.Invoke();\r
  27             return new ExportLifetimeContext<T>(untypedLifetimeContext.Item1, untypedLifetimeContext.Item2);\r
  28         }\r
  29     }\r
  30 }\r