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Attribute.Inheritedと、MemberInfo.GetCustomAttributes の関係
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| Module Module1 | |
| Sub Main() | |
| Dim log As Action(Of Func(Of Boolean)) = | |
| Sub(f) | |
| Dim cnt As Integer = 100000 | |
| Dim sw As New Stopwatch | |
| sw.Start() | |
| For i As Integer = 1 To 100000 | |
| f.Invoke() | |
| Next | |
| sw.Stop() | |
| Console.WriteLine(String.Format("{0:n4} msec", sw.ElapsedMilliseconds / cnt)) | |
| End Sub | |
| Dim p As Func(Of Boolean) = Nothing | |
| p = Function() GetType(TestBase).GetCustomAttributes(GetType(InheritedAttribute), True).Any | |
| Console.WriteLine(String.Format("通常クラス-Attribute.Inherited=True -GetCustomAttributes(True) => {0}", p.Invoke)) | |
| log.Invoke(p) | |
| p = Function() GetType(TestBase).GetCustomAttributes(GetType(InheritedAttribute), False).Any | |
| Console.WriteLine(String.Format("通常クラス-Attribute.Inherited=True -GetCustomAttributes(False)=> {0}", p.Invoke)) | |
| log.Invoke(p) | |
| p = Function() GetType(TestBase).GetCustomAttributes(GetType(NotInheritedAttribute), True).Any | |
| Console.WriteLine(String.Format("通常クラス-Attribute.Inherited=False-GetCustomAttributes(True) => {0}", p.Invoke)) | |
| log.Invoke(p) | |
| p = Function() GetType(TestBase).GetCustomAttributes(GetType(NotInheritedAttribute), False).Any | |
| Console.WriteLine(String.Format("通常クラス-Attribute.Inherited=False-GetCustomAttributes(False)=> {0}", p.Invoke)) | |
| log.Invoke(p) | |
| p = Function() GetType(Test).GetCustomAttributes(GetType(InheritedAttribute), True).Any | |
| Console.WriteLine(String.Format("継承クラス-Attribute.Inherited=True -GetCustomAttributes(True) => {0}", p.Invoke)) | |
| log.Invoke(p) | |
| p = Function() GetType(Test).GetCustomAttributes(GetType(InheritedAttribute), False).Any | |
| Console.WriteLine(String.Format("継承クラス-Attribute.Inherited=True -GetCustomAttributes(False)=> {0}", p.Invoke)) | |
| log.Invoke(p) | |
| p = Function() GetType(Test).GetCustomAttributes(GetType(NotInheritedAttribute), True).Any | |
| Console.WriteLine(String.Format("継承クラス-Attribute.Inherited=False-GetCustomAttributes(True) => {0}", p.Invoke)) | |
| log.Invoke(p) | |
| p = Function() GetType(Test).GetCustomAttributes(GetType(NotInheritedAttribute), False).Any | |
| Console.WriteLine(String.Format("継承クラス-Attribute.Inherited=False-GetCustomAttributes(False)=> {0}", p.Invoke)) | |
| log.Invoke(p) | |
| Console.ReadLine() | |
| End Sub | |
| End Module | |
| <AttributeUsage(AttributeTargets.Class, Allowmultiple:=False, Inherited:=True)> | |
| Public Class InheritedAttribute | |
| Inherits Attribute | |
| End Class | |
| <AttributeUsage(AttributeTargets.Class, Allowmultiple:=False, Inherited:=False)> | |
| Public Class NotInheritedAttribute | |
| Inherits Attribute | |
| End Class | |
| <InheritedAttribute(), NotInheritedAttribute()> | |
| Public Class TestBase | |
| Public Property Value As String | |
| End Class | |
| Public Class Test | |
| Inherits TestBase | |
| End Class |
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