mcs/class/System.ComponentModel.Composition/src/ComponentModel/System/ComponentModel/Composition/ReflectionModel/PartCreatorExportDefinition.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.Hosting;\r
   7 using System.ComponentModel.Composition.Primitives;\r
   8 \r
   9 namespace System.ComponentModel.Composition.ReflectionModel\r
  10 {\r
  11     internal class PartCreatorExportDefinition : ExportDefinition\r
  12     {\r
  13         private readonly ExportDefinition _productDefinition;\r
  14         private IDictionary<string, object> _metadata;\r
  15 \r
  16         public PartCreatorExportDefinition(ExportDefinition productDefinition)\r
  17             : base()\r
  18         {\r
  19             this._productDefinition = productDefinition;\r
  20         }\r
  21 \r
  22         public override string ContractName\r
  23         {\r
  24             get\r
  25             {\r
  26                 return CompositionConstants.PartCreatorContractName;\r
  27             }\r
  28         }\r
  29 \r
  30         public override IDictionary<string, object> Metadata\r
  31         {\r
  32             get\r
  33             {\r
  34                 if (this._metadata == null)\r
  35                 {\r
  36                     var metadata = new Dictionary<string, object>(this._productDefinition.Metadata);\r
  37                     metadata[CompositionConstants.ExportTypeIdentityMetadataName] = CompositionConstants.PartCreatorTypeIdentity;\r
  38                     metadata[CompositionConstants.ProductDefinitionMetadataName] = this._productDefinition;\r
  39 \r
  40                     this._metadata = metadata.AsReadOnly();\r
  41                 }\r
  42                 return this._metadata;\r
  43             }\r
  44         }\r
  45 \r
  46         internal static bool IsProductConstraintSatisfiedBy(ImportDefinition productImportDefinition, ExportDefinition exportDefinition)\r
  47         {\r
  48             object productValue = null;\r
  49             if (exportDefinition.Metadata.TryGetValue(CompositionConstants.ProductDefinitionMetadataName, out productValue))\r
  50             {\r
  51                 ExportDefinition productDefinition = productValue as ExportDefinition;\r
  52 \r
  53                 if (productDefinition != null)\r
  54                 {\r
  55                     return productImportDefinition.IsConstraintSatisfiedBy(productDefinition);\r
  56                 }\r
  57             }\r
  58 \r
  59             return false;\r
  60         }\r
  61     }\r
  62 }\r