mcs/class/referencesource/System.Activities.Presentation/Microsoft.Tools.Common/Microsoft/Activities/Presentation/Xaml/ImportAttributeInfo.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 ImportAttributeInfo : AttributeInfo<ImportAttribute>
  13     {
  14         static ConstructorInfo nameConstructor;
  15         static ConstructorInfo typeConstructor;
  16         static ConstructorInfo nameAndTypeConstructor;
  17
  18         public override bool IsComplete
  19         {
  20             get { return false; }
  21         }
  22
  23         public override ICollection GetConstructorArguments(ImportAttribute attribute, ref ConstructorInfo constructor)
  24         {
  25             if (attribute.ContractName != null)
  26             {
  27                 if (attribute.ContractType != null)
  28                 {
  29                     constructor = NameAndTypeConstructor;
  30                     return new object[] { attribute.ContractName, attribute.ContractType };
  31                 }
  32                 else
  33                 {
  34                     constructor = NameConstructor;
  35                     return new object[] { attribute.ContractName };
  36                 }
  37             }
  38             else if (attribute.ContractType != null)
  39             {
  40                 constructor = TypeConstructor;
  41                 return new object[] { attribute.ContractType };
  42             }
  43             else
  44             {
  45                 return new object[] { };
  46             }
  47         }
  48
  49         public override ConstructorInfo GetConstructor()
  50         {
  51             return typeof(ImportAttribute).GetConstructor(Type.EmptyTypes);
  52         }
  53
  54         static ConstructorInfo NameConstructor
  55         {
  56             get
  57             {
  58                 if (nameConstructor == null)
  59                 {
  60                     nameConstructor = typeof(ImportAttribute).GetConstructor(new Type[] { typeof(string) });
  61                 }
  62                 return nameConstructor;
  63             }
  64         }
  65
  66         static ConstructorInfo NameAndTypeConstructor
  67         {
  68             get
  69             {
  70                 if (nameAndTypeConstructor == null)
  71                 {
  72                     nameAndTypeConstructor = typeof(ImportAttribute).GetConstructor(new Type[] { typeof(string), typeof(Type) });
  73                 }
  74                 return nameAndTypeConstructor;
  75             }
  76         }
  77
  78         static ConstructorInfo TypeConstructor
  79         {
  80             get
  81             {
  82                 if (typeConstructor == null)
  83                 {
  84                     typeConstructor = typeof(ImportAttribute).GetConstructor(new Type[] { typeof(Type) });
  85                 }
  86                 return typeConstructor;
  87             }
  88         }
  89     }
  90 }