InheritedAttributes.cs
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33 
35 using System;
36 using System.Collections.Concurrent;
37 using System.Collections.Generic;
38 using System.Linq;
39 using System.Reflection;
40 using System.Text;
41 using System.Threading;
42 using System.Threading.Tasks;
43 
44 namespace Microsoft.Bot.Builder.Scorables.Internals
45 {
52  public static partial class InheritedAttributes
53  {
54  public static readonly ConcurrentDictionary<MethodInfo, IReadOnlyList<Attribute>> AttributesByMethod
55  = new ConcurrentDictionary<MethodInfo, IReadOnlyList<Attribute>>();
56 
57  private static IReadOnlyList<Attribute> ForHelper(MethodInfo method)
58  {
59  var declaring = method.DeclaringType;
60  var interfaces = declaring.GetInterfaces();
61 
62  var methods =
63  from i in interfaces
64  let map = declaring.GetInterfaceMap(i)
65  let index = Array.IndexOf(map.TargetMethods, method)
66  where index >= 0
67  let source = map.InterfaceMethods[index]
68  select source;
69 
70  Func<MethodInfo, IEnumerable<Attribute>> ExpandAttributes = m =>
71  {
72  var ma = m.GetCustomAttributes<Attribute>(inherit: true);
73  var ta = m.DeclaringType.GetCustomAttributes<Attribute>(inherit: true);
74 
75  return ma.Concat(ta);
76  };
77 
78  return ExpandAttributes(method).Concat(methods.SelectMany(m => ExpandAttributes(m))).ToArray();
79  }
80 
81  public static IEnumerable<A> For<A>(MethodInfo method) where A : Attribute
82  {
83  return AttributesByMethod
84  .GetOrAdd(method, m => ForHelper(m))
85  .OfType<A>();
86  }
87  }
88 }
Core namespace for Dialogs and associated infrastructure.
Helper methods to enumerate inherited attributes for a method.
Root namespace for the Microsoft Bot Builder SDK.