mcs/class/System.ComponentModel.Composition/src/ComponentModel/System/ComponentModel/Composition/Hosting/CatalogExportProvider.PartCreatorExport.cs

   1 // -----------------------------------------------------------------------\r
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.\r
   3 // -----------------------------------------------------------------------\r
   4 using System;\r
   5 using System.Collections.Generic;\r
   6 using System.ComponentModel.Composition.Primitives;\r
   7 using System.ComponentModel.Composition.ReflectionModel;\r
   8 using System.Linq;\r
   9 \r
  10 namespace System.ComponentModel.Composition.Hosting\r
  11 {\r
  12     public partial class CatalogExportProvider\r
  13     {\r
  14         internal class PartCreatorExport : Export\r
  15         {\r
  16             private readonly CatalogExportProvider _catalogExportProvider;\r
  17             private readonly ComposablePartDefinition _partDefinition;\r
  18             private readonly ExportDefinition _exportDefinition;\r
  19             private ExportDefinition _partCreatorExportDefinition;\r
  20             private PartCreatorPartDefinition _partCreatorPartDefinition;\r
  21 \r
  22             public PartCreatorExport(CatalogExportProvider catalogExportProvider, ComposablePartDefinition partDefinition, ExportDefinition exportDefinition)\r
  23             {\r
  24                 this._catalogExportProvider = catalogExportProvider;\r
  25                 this._partDefinition = partDefinition;\r
  26                 this._exportDefinition = exportDefinition;\r
  27                 this._partCreatorExportDefinition = new PartCreatorExportDefinition(this._exportDefinition);\r
  28             }\r
  29 \r
  30             public override ExportDefinition Definition\r
  31             {\r
  32                 get { return this._partCreatorExportDefinition; }\r
  33             }\r
  34 \r
  35             protected override object GetExportedValueCore()\r
  36             {\r
  37                 if (this._partCreatorPartDefinition == null)\r
  38                 {\r
  39                     this._partCreatorPartDefinition = new PartCreatorPartDefinition(this);\r
  40                 }\r
  41                 return this._partCreatorPartDefinition;\r
  42             }\r
  43 \r
  44             public Export CreateExportProduct()\r
  45             {\r
  46                 return new NonSharedCatalogExport(this._catalogExportProvider, this._partDefinition, this._exportDefinition);\r
  47             }\r
  48 \r
  49             private class PartCreatorPartDefinition : ComposablePartDefinition\r
  50             {\r
  51                 private readonly PartCreatorExport _partCreatorExport;\r
  52 \r
  53                 public PartCreatorPartDefinition(PartCreatorExport partCreatorExport)\r
  54                 {\r
  55                     this._partCreatorExport = partCreatorExport;\r
  56                 }\r
  57 \r
  58                 public override IEnumerable<ExportDefinition> ExportDefinitions\r
  59                 {\r
  60                     get { return new ExportDefinition[] { this._partCreatorExport.Definition }; }\r
  61                 }\r
  62 \r
  63                 public override IEnumerable<ImportDefinition> ImportDefinitions\r
  64                 {\r
  65                     get { return Enumerable.Empty<ImportDefinition>(); }\r
  66                 }\r
  67 \r
  68                 public ExportDefinition PartCreatorExportDefinition\r
  69                 {\r
  70                     get { return this._partCreatorExport.Definition; }\r
  71                 }\r
  72 \r
  73                 public Export CreateProductExport()\r
  74                 {\r
  75                     return this._partCreatorExport.CreateExportProduct();\r
  76                 }\r
  77 \r
  78                 public override ComposablePart CreatePart()\r
  79                 {\r
  80                     return new PartCreatorPart(this);\r
  81                 }\r
  82             }\r
  83 \r
  84             private sealed class PartCreatorPart : ComposablePart, IDisposable\r
  85             {\r
  86                 private readonly PartCreatorPartDefinition _definition;\r
  87                 private readonly Export _export;\r
  88 \r
  89                 public PartCreatorPart(PartCreatorPartDefinition definition)\r
  90                 {\r
  91                     this._definition = definition;\r
  92                     this._export = definition.CreateProductExport();\r
  93                 }\r
  94 \r
  95                 public override IEnumerable<ExportDefinition> ExportDefinitions\r
  96                 {\r
  97                     get { return this._definition.ExportDefinitions; }\r
  98                 }\r
  99 \r
 100                 public override IEnumerable<ImportDefinition> ImportDefinitions\r
 101                 {\r
 102                     get { return this._definition.ImportDefinitions; }\r
 103                 }\r
 104 \r
 105                 public override object GetExportedValue(ExportDefinition definition)\r
 106                 {\r
 107                     if (definition != this._definition.PartCreatorExportDefinition)\r
 108                     {\r
 109                         throw ExceptionBuilder.CreateExportDefinitionNotOnThisComposablePart("definition");\r
 110                     }\r
 111 \r
 112                     return this._export.Value;\r
 113                 }\r
 114 \r
 115                 public override void SetImport(ImportDefinition definition, IEnumerable<Export> exports)\r
 116                 {\r
 117                     throw ExceptionBuilder.CreateImportDefinitionNotOnThisComposablePart("definition");\r
 118                 }\r
 119 \r
 120                 public void Dispose()\r
 121                 {\r
 122                     IDisposable disposable = this._export as IDisposable;\r
 123 \r
 124                     if (disposable != null)\r
 125                     {\r
 126                         disposable.Dispose();\r
 127                     }\r
 128                 }\r
 129             }\r
 130         }\r
 131     }\r
 132 }\r