mcs/class/referencesource/System.Activities.Presentation/Microsoft.Tools.Common/Microsoft/Activities/Presentation/Xaml/ImportManyAttributeInfo.cs

   1 // <copyright>
   2 //   Copyright (c) Microsoft Corporation.  All rights reserved.
   3 // </copyright>
   4
   5 namespace Microsoft.Activities.Presentation.Xaml
   6 {
   7     using System;
   8     using System.Collections;
   9     using System.ComponentModel.Composition;
  10     using System.Reflection;
  11
  12     class ImportManyAttributeInfo : AttributeInfo<ImportManyAttribute>
  13     {
  14         static ConstructorInfo nameConstructor;
  15         static ConstructorInfo typeConstructor;
  16         static ConstructorInfo nameAndTypeConstructor;
  17
  18         public override bool IsComplete
  19         {
  20             get
  21             {
  22                 return false;
  23             }
  24         }
  25
  26         public override ICollection GetConstructorArguments(ImportManyAttribute attribute, ref ConstructorInfo constructor)
  27         {
  28             if (attribute.ContractName != null)
  29             {
  30                 if (attribute.ContractType != null)
  31                 {
  32                     constructor = NameAndTypeConstructor;
  33                     return new object[] { attribute.ContractName, attribute.ContractType };
  34                 }
  35                 else
  36                 {
  37                     constructor = NameConstructor;
  38                     return new object[] { attribute.ContractName };
  39                 }
  40             }
  41             else if (attribute.ContractType != null)
  42             {
  43                 constructor = TypeConstructor;
  44                 return new object[] { attribute.ContractType };
  45             }
  46             else
  47             {
  48                 return new object[] { };
  49             }
  50         }
  51
  52         public override ConstructorInfo GetConstructor()
  53         {
  54             return typeof(ImportManyAttribute).GetConstructor(Type.EmptyTypes);
  55         }
  56
  57         static ConstructorInfo NameConstructor
  58         {
  59             get
  60             {
  61                 if (nameConstructor == null)
  62                 {
  63                     nameConstructor = typeof(ImportManyAttribute).GetConstructor(new Type[] { typeof(string) });
  64                 }
  65                 return nameConstructor;
  66             }
  67         }
  68
  69         static ConstructorInfo NameAndTypeConstructor
  70         {
  71             get
  72             {
  73                 if (nameAndTypeConstructor == null)
  74                 {
  75                     nameAndTypeConstructor = typeof(ImportManyAttribute).GetConstructor(new Type[] { typeof(Type) });
  76                 }
  77                 return nameAndTypeConstructor;
  78             }
  79         }
  80
  81         static ConstructorInfo TypeConstructor
  82         {
  83             get
  84             {
  85                 if (typeConstructor == null)
  86                 {
  87                     typeConstructor = typeof(ImportManyAttribute).GetConstructor(new Type[] { typeof(string), typeof(Type) });
  88                 }
  89                 return typeConstructor;
  90             }
  91         }
  92     }
  93 }