1064 lines
61 KiB
VB.net
1064 lines
61 KiB
VB.net
#Region "Microsoft.VisualBasic::ebf65ebbe1044ca1c5390f0e2c662737, Microsoft.VisualBasic.Core\Extensions\Reflection\Delegate\DelegateFactory.vb"
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' Author:
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'
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' asuka (amethyst.asuka@gcmodeller.org)
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' xie (genetics@smrucc.org)
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' xieguigang (xie.guigang@live.com)
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'
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' Copyright (c) 2018 GPL3 Licensed
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'
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'
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' GNU GENERAL PUBLIC LICENSE (GPL3)
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'
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'
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' This program is free software: you can redistribute it and/or modify
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' it under the terms of the GNU General Public License as published by
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' the Free Software Foundation, either version 3 of the License, or
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' (at your option) any later version.
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'
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' This program is distributed in the hope that it will be useful,
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' but WITHOUT ANY WARRANTY; without even the implied warranty of
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' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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' GNU General Public License for more details.
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'
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' You should have received a copy of the GNU General Public License
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' along with this program. If not, see <http://www.gnu.org/licenses/>.
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' /********************************************************************************/
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' Summaries:
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' Module DelegateFactory
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'
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' Function: (+3 Overloads) Contructor, (+2 Overloads) DefaultContructor, DelegateIndexerGet, DelegateIndexerSet, (+2 Overloads) EventAccessor
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' EventAccessorImpl, (+4 Overloads) EventAdd, EventAddImpl, EventHandlerFactory, (+4 Overloads) EventRemove
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' EventRemoveImpl, (+3 Overloads) FieldGet, FieldGet2, (+3 Overloads) FieldSet, (+2 Overloads) FieldSetWithCast
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' GetConstructorInfo, GetEventInfo, GetEventInfoAccessor, GetFieldInfo, GetFuncDelegateArguments
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' GetFuncDelegateReturnType, GetIndexerPropertyInfo, GetMethodInfo, GetPropertyInfo, GetStaticFieldInfo
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' GetStaticMethodInfo, GetStaticPropertyInfo, (+8 Overloads) IndexerGet, (+7 Overloads) IndexerSet, (+2 Overloads) InstanceGenericMethod
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' InstanceGenericMethodVoid, (+9 Overloads) InstanceMethod, InstanceMethod2, InstanceMethodVoid, (+6 Overloads) PropertyGet
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' PropertyGet2, (+4 Overloads) PropertySet, StaticEventAdd, (+3 Overloads) StaticFieldGet, StaticFieldGetExpr
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' (+3 Overloads) StaticFieldSet, StaticGenericMethod, StaticGenericMethodVoid, (+12 Overloads) StaticMethod, StaticMethodVoid
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' (+3 Overloads) StaticPropertyGet, StaticPropertyGet2, (+3 Overloads) StaticPropertySet
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.Collections.Generic
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Imports System.Linq
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Imports System.Linq.Expressions
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Imports System.Reflection
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Imports System.Runtime.CompilerServices
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Namespace Emit.Delegates
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Public Module DelegateFactory
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Const AddAccessor As String = "add"
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Const Item As String = "Item"
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Const RemoveAccessor As String = "remove"
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ReadOnly EventHandlerFactoryMethodInfo As MethodInfo = GetType(DelegateFactory).GetMethod("EventHandlerFactory")
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ReadOnly EventsProxies As New Dictionary(Of WeakReference(Of Object), WeakReference(Of Object))()
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Public Function Contructor(Of TDelegate As Class)() As TDelegate
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Dim source = GetFuncDelegateReturnType(Of TDelegate)()
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Dim ctrArgs = GetFuncDelegateArguments(Of TDelegate)()
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Dim constructorInfo = GetConstructorInfo(source, ctrArgs)
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If constructorInfo Is Nothing Then
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Return Nothing
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End If
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Dim parameters = ctrArgs.[Select](AddressOf Expression.Parameter).AsList()
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Return TryCast(Expression.Lambda(Expression.[New](constructorInfo, parameters), parameters).Compile(), TDelegate)
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End Function
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<Extension>
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Public Function Contructor(source As Type, ParamArray ctrArgs As Type()) As Func(Of Object(), Object)
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Dim constructorInfo = GetConstructorInfo(source, ctrArgs)
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If constructorInfo Is Nothing Then
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Return Nothing
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End If
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Dim argsArray = Expression.Parameter(GetType(Object()))
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Dim paramsExpression = New Expression(ctrArgs.Length - 1) {}
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For i As Integer = 0 To ctrArgs.Length - 1
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Dim argType = ctrArgs(i)
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paramsExpression(i) = Expression.Convert(Expression.ArrayIndex(argsArray, Expression.Constant(i)), argType)
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Next
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Dim returnExpression As Expression = Expression.[New](constructorInfo, paramsExpression)
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If Not source.IsClass Then
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returnExpression = Expression.Convert(returnExpression, GetType(Object))
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End If
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Return DirectCast(Expression.Lambda(returnExpression, argsArray).Compile(), Func(Of Object(), Object))
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End Function
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<Extension>
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Public Function Contructor(Of TDelegate As Class)(source As Type) As TDelegate
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Dim ctrArgs = GetFuncDelegateArguments(Of TDelegate)()
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Dim constructorInfo = GetConstructorInfo(source, ctrArgs)
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If constructorInfo Is Nothing Then
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Return Nothing
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End If
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Dim parameters = ctrArgs.[Select](AddressOf Expression.Parameter).AsList()
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Dim returnExpression As Expression = Expression.[New](constructorInfo, parameters)
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If Not source.IsClass Then
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returnExpression = Expression.Convert(returnExpression, GetType(Object))
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End If
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Return TryCast(Expression.Lambda(returnExpression, parameters).Compile(), TDelegate)
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End Function
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Public Function DefaultContructor(Of TSource)() As Func(Of TSource)
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Return Contructor(Of Func(Of TSource))()
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End Function
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<Extension>
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Public Function DefaultContructor(type As Type) As Func(Of Object)
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Return type.Contructor(Of Func(Of Object))()
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End Function
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Public Function DelegateIndexerGet(source As Type, returnType As Type, ParamArray indexTypes As Type()) As [Delegate]
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Dim propertyInfo = GetIndexerPropertyInfo(source, returnType, indexTypes)
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If propertyInfo.GetMethod Is Nothing Then
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Return Nothing
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End If
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Dim sourceObjectParam = Expression.Parameter(GetType(Object))
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Dim paramsExpression = New ParameterExpression(indexTypes.Length - 1) {}
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For i As Integer = 0 To indexTypes.Length - 1
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Dim indexType = indexTypes(i)
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paramsExpression(i) = Expression.Parameter(indexType)
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Next
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Return Expression.Lambda(Expression.[Call](Expression.Convert(sourceObjectParam, source), propertyInfo.GetMethod, paramsExpression), {sourceObjectParam}.Concat(paramsExpression)).Compile()
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End Function
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Public Function DelegateIndexerSet(source As Type, returnType As Type, ParamArray indexTypes As Type()) As [Delegate]
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Dim propertyInfo = GetIndexerPropertyInfo(source, returnType, indexTypes)
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If propertyInfo.SetMethod Is Nothing Then
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Return Nothing
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End If
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Dim sourceObjectParam = Expression.Parameter(GetType(Object))
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Dim valueParam = Expression.Parameter(returnType)
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Dim indexExpressions = New ParameterExpression(indexTypes.Length - 1) {}
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For i As Integer = 0 To indexTypes.Length - 1
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Dim indexType = indexTypes(i)
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indexExpressions(i) = Expression.Parameter(indexType)
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Next
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Dim callArgs = indexExpressions.Concat({valueParam}).ToArray()
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Dim paramsExpressions = {sourceObjectParam}.Concat(callArgs)
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Return Expression.Lambda(Expression.[Call](Expression.Convert(sourceObjectParam, source), propertyInfo.SetMethod, callArgs), paramsExpressions).Compile()
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End Function
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Public Function EventAdd(Of TSource, TEventArgs)(eventName As String) As Action(Of TSource, EventHandler(Of TEventArgs))
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Return EventAccessor(Of TSource, TEventArgs)(eventName, AddAccessor)
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End Function
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<Extension>
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Public Function EventAdd(Of TEventArgs)(source As Type, eventName As String) As Action(Of Object, EventHandler(Of TEventArgs))
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Return EventAccessor(Of TEventArgs)(source, eventName, AddAccessor)
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End Function
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Public Function EventAdd(Of TSource)(eventName As String) As Action(Of TSource, Action(Of TSource, Object))
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Return GetType(TSource).EventAddImpl(Of Action(Of TSource, Action(Of TSource, Object)))(eventName)
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End Function
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<Extension>
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Public Function EventAdd(source As Type, eventName As String) As Action(Of Object, Action(Of Object, Object))
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Return source.EventAddImpl(Of Action(Of Object, Action(Of Object, Object)))(eventName)
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End Function
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Public Function EventHandlerFactory(Of TEventArgs As Class, TSource)(handler As Object, isRemove As Boolean) As EventHandler(Of TEventArgs)
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Dim newEventHandler As EventHandler(Of TEventArgs)
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Dim haveKey = False
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Dim kv = EventsProxies.FirstOrDefault(
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Function(k)
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Dim keyTarget As Object = Nothing
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k.Key.TryGetTarget(keyTarget)
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If Equals(keyTarget, handler) Then
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haveKey = True
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Return True
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End If
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Return False
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End Function)
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If haveKey Then
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Dim fromCache As Object = Nothing
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EventsProxies(kv.Key).TryGetTarget(fromCache)
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newEventHandler = DirectCast(fromCache, EventHandler(Of TEventArgs))
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If isRemove Then
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EventsProxies.Remove(kv.Key)
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Return newEventHandler
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End If
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End If
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If Not isRemove Then
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Dim action = TryCast(handler, Action(Of TSource, Object))
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If action IsNot Nothing Then
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newEventHandler = Sub(s, a) action(DirectCast(s, TSource), a)
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Else
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newEventHandler = New EventHandler(Of TEventArgs)(AddressOf DirectCast(handler, Action(Of Object, Object)).Invoke)
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End If
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EventsProxies(New WeakReference(Of Object)(handler)) = New WeakReference(Of Object)(newEventHandler)
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Return newEventHandler
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End If
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Return Nothing
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End Function
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<Extension>
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Public Function EventRemove(Of TEventArgs)(source As Type, eventName As String) As Action(Of Object, EventHandler(Of TEventArgs))
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Return EventAccessor(Of TEventArgs)(source, eventName, RemoveAccessor)
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End Function
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Public Function EventRemove(Of TSource, TEventArgs)(eventName As String) As Action(Of TSource, EventHandler(Of TEventArgs))
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Return EventAccessor(Of TSource, TEventArgs)(eventName, RemoveAccessor)
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End Function
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Public Function EventRemove(Of TSource)(eventName As String) As Action(Of TSource, Action(Of TSource, Object))
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Return GetType(TSource).EventRemoveImpl(Of Action(Of TSource, Action(Of TSource, Object)))(eventName)
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End Function
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<Extension>
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Public Function EventRemove(source As Type, eventName As String) As Action(Of Object, Action(Of Object, Object))
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Return source.EventRemoveImpl(Of Action(Of Object, Action(Of Object, Object)))(eventName)
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End Function
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Public Function FieldGet(Of TSource, TField)(fieldName As String) As Func(Of TSource, TField)
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Dim source = GetType(TSource)
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Dim d As Object = source.FieldGet(fieldName)
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Return TryCast(d, Func(Of TSource, TField))
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End Function
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<Extension>
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Public Function FieldGet(Of TField)(source As Type, fieldName As String) As Func(Of Object, TField)
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Return TryCast(source.FieldGet(fieldName), Func(Of Object, TField))
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End Function
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<Extension>
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Public Function FieldGet(source As Type, fieldName As String) As Func(Of Object, Object)
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Dim fieldInfo = GetFieldInfo(source, fieldName)
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If fieldInfo IsNot Nothing Then
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Dim sourceParam = Expression.Parameter(GetType(Object))
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Dim returnExpression As Expression = Expression.Field(Expression.Convert(sourceParam, source), fieldInfo)
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If Not fieldInfo.FieldType.IsClass Then
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returnExpression = Expression.Convert(returnExpression, GetType(Object))
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End If
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Dim lambda = Expression.Lambda(returnExpression, sourceParam)
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Return DirectCast(lambda.Compile(), Func(Of Object, Object))
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End If
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Return Nothing
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End Function
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<Obsolete>
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<Extension>
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Public Function FieldGet2(Of TField)(source As Type, fieldName As String) As Func(Of Object, TField)
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Dim fieldInfo = GetFieldInfo(source, fieldName)
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If fieldInfo IsNot Nothing Then
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Dim sourceParam = Expression.Parameter(GetType(Object))
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Dim returnExpression As Expression = Expression.Field(Expression.Convert(sourceParam, source), fieldInfo)
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Dim lambda = Expression.Lambda(returnExpression, sourceParam)
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Return DirectCast(lambda.Compile(), Func(Of Object, TField))
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End If
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Return Nothing
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End Function
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<Extension>
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Public Function FieldSet(Of TProperty)(source As Type, fieldName As String) As Action(Of Object, TProperty)
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Dim fieldInfo As FieldInfo = GetFieldInfo(source, fieldName)
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If fieldInfo IsNot Nothing AndAlso Not fieldInfo.IsInitOnly Then
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Dim sourceParam = Expression.Parameter(GetType(Object)) ' args1 参数
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Dim valueParam = Expression.Parameter(GetType(TProperty)) ' args2 参数
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Dim target = Expression.Convert(sourceParam, source) ' args1 As <source Type>
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Dim fieldRef = Expression.Field(target, fieldInfo) ' args1.Field
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Dim setValue = Expression.Assign(fieldRef, valueParam) ' args1.Field = args2
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Dim delgType As Type = GetType(Action(Of Object, TProperty))
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Dim te = Expression.Lambda(delgType, setValue, sourceParam, valueParam)
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Return DirectCast(te.Compile(), Action(Of Object, TProperty))
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End If
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Return Nothing
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End Function
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Public Function FieldSet(Of TSource, TProperty)(fieldName As String) As Action(Of TSource, TProperty)
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Dim source = GetType(TSource)
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Dim fieldInfo = GetFieldInfo(source, fieldName)
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If fieldInfo IsNot Nothing AndAlso Not fieldInfo.IsInitOnly Then
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Dim sourceParam = Expression.Parameter(source)
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Dim valueParam = Expression.Parameter(GetType(TProperty))
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Dim te = Expression.Lambda(GetType(Action(Of TSource, TProperty)), Expression.Assign(Expression.Field(sourceParam, fieldInfo), valueParam), sourceParam, valueParam)
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Return DirectCast(te.Compile(), Action(Of TSource, TProperty))
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End If
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Return Nothing
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End Function
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<Extension>
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Public Function FieldSet(source As Type, fieldName As String) As Action(Of Object, Object)
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Dim fieldInfo = GetFieldInfo(source, fieldName)
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If fieldInfo IsNot Nothing AndAlso Not fieldInfo.IsInitOnly Then
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Dim sourceParam = Expression.Parameter(GetType(Object))
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Dim valueParam = Expression.Parameter(GetType(Object))
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Dim convertedValueExpr = Expression.Convert(valueParam, fieldInfo.FieldType)
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Dim returnExpression As Expression = Expression.Assign(Expression.Field(Expression.Convert(sourceParam, source), fieldInfo), convertedValueExpr)
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If Not fieldInfo.FieldType.IsClass Then
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returnExpression = Expression.Convert(returnExpression, GetType(Object))
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End If
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Dim lambda = Expression.Lambda(GetType(Action(Of Object, Object)), returnExpression, sourceParam, valueParam)
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Return DirectCast(lambda.Compile(), Action(Of Object, Object))
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End If
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Return Nothing
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End Function
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<Obsolete>
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<Extension>
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Public Function FieldSetWithCast(Of TProperty)(source As Type, fieldName As String) As Action(Of Object, TProperty)
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Return TryCast(source.FieldSet(fieldName), Action(Of Object, TProperty))
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End Function
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<Obsolete>
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Public Function FieldSetWithCast(Of TSource, TProperty)(fieldName As String) As Action(Of TSource, TProperty)
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Return TryCast(GetType(TSource).FieldSet(fieldName), Action(Of TSource, TProperty))
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End Function
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Public Function IndexerGet(Of TSource, TReturn, TIndex)() As Func(Of TSource, TIndex, TReturn)
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Dim propertyInfo = GetIndexerPropertyInfo(GetType(TSource), GetType(TReturn), {GetType(TIndex)})
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Return DirectCast(propertyInfo.GetMethod.CreateDelegate(GetType(Func(Of TSource, TIndex, TReturn))), Func(Of TSource, TIndex, TReturn))
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End Function
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Public Function IndexerGet(Of TSource, TReturn, TIndex, TIndex2)() As Func(Of TSource, TIndex, TIndex2, TReturn)
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Dim propertyInfo = GetIndexerPropertyInfo(GetType(TSource), GetType(TReturn), {GetType(TIndex), GetType(TIndex2)})
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Return DirectCast(propertyInfo.GetMethod.CreateDelegate(GetType(Func(Of TSource, TIndex, TIndex2, TReturn))), Func(Of TSource, TIndex, TIndex2, TReturn))
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End Function
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Public Function IndexerGet(Of TSource, TReturn, TIndex, TIndex2, TIndex3)() As Func(Of TSource, TIndex, TIndex2, TIndex2, TReturn)
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Dim propertyInfo = GetIndexerPropertyInfo(GetType(TSource), GetType(TReturn), {GetType(TIndex), GetType(TIndex2), GetType(TIndex3)})
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Return DirectCast(propertyInfo.GetMethod.CreateDelegate(GetType(Func(Of TSource, TIndex, TIndex2, TIndex2, TReturn))), Func(Of TSource, TIndex, TIndex2, TIndex2, TReturn))
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End Function
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<Extension>
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Public Function IndexerGet(Of TReturn, TIndex)(source As Type) As Func(Of Object, TIndex, TReturn)
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Dim indexType = GetType(TIndex)
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Return DirectCast(DelegateIndexerGet(source, GetType(TReturn), indexType), Func(Of Object, TIndex, TReturn))
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End Function
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<Extension>
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Public Function IndexerGet(Of TReturn, TIndex, TIndex2)(source As Type) As Func(Of Object, TIndex, TIndex2, TReturn)
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Dim indexType = GetType(TIndex)
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Dim indexType2 = GetType(TIndex2)
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Return DirectCast(DelegateIndexerGet(source, GetType(TReturn), indexType, indexType2), Func(Of Object, TIndex, TIndex2, TReturn))
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End Function
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<Extension>
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Public Function IndexerGet(Of TReturn, TIndex, TIndex2, TIndex3)(source As Type) As Func(Of Object, TIndex, TIndex2, TIndex3, TReturn)
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Dim indexType = GetType(TIndex)
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Dim indexType2 = GetType(TIndex2)
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Dim indexType3 = GetType(TIndex3)
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Return DirectCast(DelegateIndexerGet(source, GetType(TReturn), indexType, indexType2, indexType3), Func(Of Object, TIndex, TIndex2, TIndex3, TReturn))
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End Function
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<Extension>
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Public Function IndexerGet(source As Type, returnType As Type, ParamArray indexTypes As Type()) As Func(Of Object, Object(), Object)
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Dim propertyInfo = GetIndexerPropertyInfo(source, returnType, indexTypes)
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If propertyInfo.GetMethod Is Nothing Then
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Return Nothing
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End If
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Dim sourceObjectParam = Expression.Parameter(GetType(Object))
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Dim indexesParam = Expression.Parameter(GetType(Object()))
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Dim paramsExpression = New Expression(indexTypes.Length - 1) {}
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For i As Integer = 0 To indexTypes.Length - 1
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Dim indexType = indexTypes(i)
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paramsExpression(i) = Expression.Convert(Expression.ArrayIndex(indexesParam, Expression.Constant(i)), indexType)
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Next
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Dim returnExpression As Expression = Expression.[Call](Expression.Convert(sourceObjectParam, source), propertyInfo.GetMethod, paramsExpression)
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If Not propertyInfo.PropertyType.IsClass Then
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returnExpression = Expression.Convert(returnExpression, GetType(Object))
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End If
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Return DirectCast(Expression.Lambda(returnExpression, sourceObjectParam, indexesParam).Compile(), Func(Of Object, Object(), Object))
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End Function
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<Extension>
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Public Function IndexerGet(source As Type, returnType As Type, indexType As Type) As Func(Of Object, Object, Object)
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Dim propertyInfo = GetIndexerPropertyInfo(source, returnType, {indexType})
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If propertyInfo.GetMethod Is Nothing Then
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Return Nothing
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End If
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Dim sourceObjectParam = Expression.Parameter(GetType(Object))
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Dim indexObjectParam = Expression.Parameter(GetType(Object))
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Dim returnExpression As Expression = Expression.[Call](Expression.Convert(sourceObjectParam, source), propertyInfo.GetMethod, Expression.Convert(indexObjectParam, indexType))
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If Not propertyInfo.PropertyType.IsClass Then
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returnExpression = Expression.Convert(returnExpression, GetType(Object))
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End If
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Return DirectCast(Expression.Lambda(returnExpression, sourceObjectParam, indexObjectParam).Compile(), Func(Of Object, Object, Object))
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End Function
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<Extension>
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Public Function IndexerSet(Of TReturn, TIndex)(source As Type) As Action(Of Object, TIndex, TReturn)
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Dim indexType = GetType(TIndex)
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Return DirectCast(DelegateIndexerSet(source, GetType(TReturn), indexType), Action(Of Object, TIndex, TReturn))
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End Function
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<Extension>
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Public Function IndexerSet(Of TReturn, TIndex, TIndex2)(source As Type) As Action(Of Object, TIndex, TIndex2, TReturn)
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Dim indexType = GetType(TIndex)
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Dim indexType2 = GetType(TIndex2)
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Return DirectCast(DelegateIndexerSet(source, GetType(TReturn), indexType, indexType2), Action(Of Object, TIndex, TIndex2, TReturn))
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End Function
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<Extension>
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Public Function IndexerSet(Of TReturn, TIndex, TIndex2, TIndex3)(source As Type) As Action(Of Object, TIndex, TIndex2, TIndex3, TReturn)
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Dim indexType = GetType(TIndex)
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Dim indexType2 = GetType(TIndex2)
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Dim indexType3 = GetType(TIndex3)
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Return DirectCast(DelegateIndexerSet(source, GetType(TReturn), indexType, indexType2, indexType3), Action(Of Object, TIndex, TIndex2, TIndex3, TReturn))
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End Function
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|
|
Public Function IndexerSet(Of TSource, TIndex, TProperty)() As Action(Of TSource, TIndex, TProperty)
|
|
Dim sourceType = GetType(TSource)
|
|
Dim propertyInfo = GetIndexerPropertyInfo(sourceType, GetType(TProperty), {GetType(TIndex)})
|
|
Return DirectCast(propertyInfo.SetMethod.CreateDelegate(GetType(Action(Of TSource, TIndex, TProperty))), Action(Of TSource, TIndex, TProperty))
|
|
End Function
|
|
|
|
Public Function IndexerSet(Of TSource, TReturn, TIndex, TIndex2)() As Action(Of TSource, TIndex, TIndex2, TReturn)
|
|
Dim propertyInfo = GetIndexerPropertyInfo(GetType(TSource), GetType(TReturn), {GetType(TIndex), GetType(TIndex2)})
|
|
Return DirectCast(propertyInfo.SetMethod.CreateDelegate(GetType(Action(Of TSource, TIndex, TIndex2, TReturn))), Action(Of TSource, TIndex, TIndex2, TReturn))
|
|
End Function
|
|
|
|
Public Function IndexerSet(Of TSource, TReturn, TIndex, TIndex2, TIndex3)() As Action(Of TSource, TIndex, TIndex2, TIndex2, TReturn)
|
|
Dim propertyInfo = GetIndexerPropertyInfo(GetType(TSource), GetType(TReturn), {GetType(TIndex), GetType(TIndex2), GetType(TIndex3)})
|
|
Return DirectCast(propertyInfo.SetMethod.CreateDelegate(GetType(Action(Of TSource, TIndex, TIndex2, TIndex2, TReturn))), Action(Of TSource, TIndex, TIndex2, TIndex2, TReturn))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function IndexerSet(source As Type, returnType As Type, ParamArray indexTypes As Type()) As Action(Of Object, Object(), Object)
|
|
Dim propertyInfo = GetIndexerPropertyInfo(source, returnType, indexTypes)
|
|
If propertyInfo.SetMethod Is Nothing Then
|
|
Return Nothing
|
|
End If
|
|
Dim sourceObjectParam = Expression.Parameter(GetType(Object))
|
|
Dim indexesParam = Expression.Parameter(GetType(Object()))
|
|
Dim valueParam = Expression.Parameter(GetType(Object))
|
|
Dim paramsExpression = New Expression(indexTypes.Length) {}
|
|
For i As Integer = 0 To indexTypes.Length - 1
|
|
Dim indexType = indexTypes(i)
|
|
paramsExpression(i) = Expression.Convert(Expression.ArrayIndex(indexesParam, Expression.Constant(i)), indexType)
|
|
Next
|
|
paramsExpression(indexTypes.Length) = Expression.Convert(valueParam, returnType)
|
|
Dim returnExpression As Expression = Expression.[Call](Expression.Convert(sourceObjectParam, source), propertyInfo.SetMethod, paramsExpression)
|
|
Return DirectCast(Expression.Lambda(returnExpression, sourceObjectParam, indexesParam, valueParam).Compile(), Action(Of Object, Object(), Object))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function InstanceGenericMethod(source As Type, name As String, paramsTypes As Type(), typeParams As Type()) As Func(Of Object, Object(), Object)
|
|
Return InstanceGenericMethod(Of Func(Of Object, Object(), Object))(source, name, typeParams, paramsTypes)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function InstanceGenericMethod(Of TDelegate As Class)(source As Type, name As String, typeParams As Type(), paramsTypes As Type()) As TDelegate
|
|
Dim methodInfo = GetMethodInfo(source, name, paramsTypes, typeParams)
|
|
If methodInfo Is Nothing Then
|
|
Return Nothing
|
|
End If
|
|
Dim argsArray = Expression.Parameter(GetType(Object()))
|
|
Dim sourceParameter = Expression.Parameter(GetType(Object))
|
|
Dim paramsExpression = New Expression(paramsTypes.Length - 1) {}
|
|
For i As Integer = 0 To paramsTypes.Length - 1
|
|
Dim argType = paramsTypes(i)
|
|
paramsExpression(i) = Expression.Convert(Expression.ArrayIndex(argsArray, Expression.Constant(i)), argType)
|
|
Next
|
|
Dim returnExpression As Expression = Expression.[Call](Expression.Convert(sourceParameter, source), methodInfo, paramsExpression)
|
|
If methodInfo.ReturnType IsNot GetType(System.Void) AndAlso Not methodInfo.ReturnType.IsClass Then
|
|
returnExpression = Expression.Convert(returnExpression, GetType(Object))
|
|
End If
|
|
Return TryCast(Expression.Lambda(returnExpression, sourceParameter, argsArray).Compile(), TDelegate)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function InstanceGenericMethodVoid(source As Type, name As String, paramsTypes As Type(), typeParams As Type()) As Action(Of Object, Object())
|
|
Return InstanceGenericMethod(Of Action(Of Object, Object()))(source, name, typeParams, paramsTypes)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function InstanceMethod(source As Type, name As String, ParamArray paramsTypes As Type()) As Func(Of Object, Object(), Object)
|
|
Return InstanceGenericMethod(Of Func(Of Object, Object(), Object))(source, name, Nothing, paramsTypes)
|
|
End Function
|
|
|
|
Public Function InstanceMethod(Of TDelegate As Class, TParam1)(name As String) As TDelegate
|
|
Return InstanceMethod(Of TDelegate)(name, GetType(TParam1))
|
|
End Function
|
|
|
|
Public Function InstanceMethod(Of TDelegate As Class, TParam1, TParam2)(name As String) As TDelegate
|
|
Return InstanceMethod(Of TDelegate)(name, GetType(TParam1), GetType(TParam2))
|
|
End Function
|
|
|
|
Public Function InstanceMethod(Of TDelegate As Class, TParam1, TParam2, TParam3)(name As String) As TDelegate
|
|
Return InstanceMethod(Of TDelegate)(name, GetType(TParam1), GetType(TParam2), GetType(TParam3))
|
|
End Function
|
|
|
|
Public Function InstanceMethod(Of TDelegate As Class)(name As String, ParamArray typeParameters As Type()) As TDelegate
|
|
Dim paramsTypes = GetFuncDelegateArguments(Of TDelegate)()
|
|
Dim source = paramsTypes.First()
|
|
paramsTypes = paramsTypes.Skip(1).ToArray()
|
|
Dim methodInfo = GetMethodInfo(source, name, paramsTypes, typeParameters)
|
|
Return TryCast(methodInfo.CreateDelegate(GetType(TDelegate)), TDelegate)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function InstanceMethod(Of TDelegate As Class, TParam1)(source As Type, name As String) As TDelegate
|
|
Return source.InstanceMethod(Of TDelegate)(name, {GetType(TParam1)})
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function InstanceMethod(Of TDelegate As Class, TParam1, TParam2)(source As Type, name As String) As TDelegate
|
|
Return source.InstanceMethod(Of TDelegate)(name, {GetType(TParam1), GetType(TParam2)})
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function InstanceMethod(Of TDelegate As Class, TParam1, TParam2, TParam3)(source As Type, name As String) As TDelegate
|
|
Return source.InstanceMethod(Of TDelegate)(name, {GetType(TParam1), GetType(TParam2), GetType(TParam3)})
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function InstanceMethod(Of TDelegate As Class)(source As Type, name As String, Optional typeParams As Type() = Nothing) As TDelegate
|
|
Dim delegateParams = GetFuncDelegateArguments(Of TDelegate)()
|
|
Dim instanceParam = delegateParams(0)
|
|
delegateParams = delegateParams.Skip(1).ToArray()
|
|
Dim methodInfo = GetMethodInfo(source, name, delegateParams, typeParams)
|
|
If methodInfo Is Nothing Then
|
|
Return Nothing
|
|
End If
|
|
Dim deleg As [Delegate]
|
|
If instanceParam Is source Then
|
|
deleg = methodInfo.CreateDelegate(GetType(TDelegate))
|
|
Else
|
|
Dim sourceParameter = Expression.Parameter(GetType(Object))
|
|
Dim expressions = delegateParams.[Select](AddressOf Expression.Parameter).ToArray()
|
|
Dim returnExpression As Expression = Expression.[Call](Expression.Convert(sourceParameter, source), methodInfo, expressions.Cast(Of Expression)())
|
|
If methodInfo.ReturnType IsNot GetType(System.Void) AndAlso Not methodInfo.ReturnType.IsClass Then
|
|
returnExpression = Expression.Convert(returnExpression, GetType(Object))
|
|
End If
|
|
Dim lamdaParams = {sourceParameter}.Concat(expressions)
|
|
deleg = Expression.Lambda(returnExpression, lamdaParams).Compile()
|
|
End If
|
|
Return TryCast(deleg, TDelegate)
|
|
End Function
|
|
|
|
Public Function InstanceMethod2(Of TDelegate As Class)(methodName As String) As TDelegate
|
|
Dim source = GetType(TDelegate).GenericTypeArguments(0)
|
|
Dim param = Expression.Parameter(source)
|
|
Dim parameters = New List(Of ParameterExpression)() From {
|
|
param
|
|
}
|
|
Dim params = GetFuncDelegateArguments(Of TDelegate)().Skip(1)
|
|
For Each type In params
|
|
parameters.Add(Expression.Parameter(type))
|
|
Next
|
|
Dim te = Expression.Lambda(Expression.[Call](param, methodName, Nothing, parameters.Skip(1).Cast(Of Expression)().ToArray()), parameters)
|
|
Return TryCast(te.Compile(), TDelegate)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function InstanceMethodVoid(source As Type, name As String, ParamArray paramsTypes As Type()) As Action(Of Object, Object())
|
|
Return InstanceGenericMethod(Of Action(Of Object, Object()))(source, name, Nothing, paramsTypes)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function PropertyGet(Of TProperty)(source As Type, propertyName As String) As Func(Of Object, TProperty)
|
|
Return TryCast(source.PropertyGet(propertyName), Func(Of Object, TProperty))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function PropertyGet(source As Type, propertyName As String) As Func(Of Object, Object)
|
|
Dim propertyInfo = GetPropertyInfo(source, propertyName)
|
|
If propertyInfo.GetMethod Is Nothing Then
|
|
Return Nothing
|
|
Else
|
|
Return source.PropertyGet(propertyInfo)
|
|
End If
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function PropertyGet(source As Type, [propertyInfo] As PropertyInfo) As Func(Of Object, Object)
|
|
Dim sourceObjectParam = Expression.Parameter(GetType(Object))
|
|
Dim returnExpression As Expression = Expression.[Call](Expression.Convert(sourceObjectParam, source), propertyInfo.GetMethod)
|
|
If Not propertyInfo.PropertyType.IsClass Then
|
|
returnExpression = Expression.Convert(returnExpression, GetType(Object))
|
|
End If
|
|
Return DirectCast(Expression.Lambda(returnExpression, sourceObjectParam).Compile(), Func(Of Object, Object))
|
|
End Function
|
|
|
|
<Extension> Public Function PropertyGet(Of TSource, TProperty)(propertyInfo As PropertyInfo) As Func(Of TSource, TProperty)
|
|
Return PropertyGet(Of TSource, TProperty)(Nothing, propertyInfo)
|
|
End Function
|
|
|
|
Public Function PropertyGet(Of TSource, TProperty)(propertyName As String) As Func(Of TSource, TProperty)
|
|
Return PropertyGet(Of TSource, TProperty)(propertyName, Nothing)
|
|
End Function
|
|
|
|
<Obsolete>
|
|
<Extension>
|
|
Public Function PropertyGet2(Of TSource, TProperty)(source As Type, propertyName As String) As Func(Of TSource, TProperty)
|
|
Dim p = Expression.Parameter(source)
|
|
Dim te = Expression.Lambda(Expression.[Property](p, propertyName), p)
|
|
Return DirectCast(te.Compile(), Func(Of TSource, TProperty))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function PropertySet(Of TSource, TProperty)(source As TSource, propertyName As String) As Action(Of TSource, TProperty)
|
|
Return PropertySet(Of TSource, TProperty)(propertyName)
|
|
End Function
|
|
|
|
''' <summary>
|
|
''' 为指定类型的对象实例设置属性值，返回空值表名目标属性为一个只读属性或者写过程为私有访问类型
|
|
''' </summary>
|
|
''' <typeparam name="TProperty"></typeparam>
|
|
''' <param name="source"></param>
|
|
''' <param name="propertyName"></param>
|
|
''' <returns></returns>
|
|
<Extension>
|
|
Public Function PropertySet(Of TProperty)(source As Type, propertyName As String) As Action(Of Object, TProperty)
|
|
Dim propertyInfo = GetPropertyInfo(source, propertyName)
|
|
If propertyInfo.SetMethod Is Nothing Then
|
|
Return Nothing
|
|
End If
|
|
Dim sourceObjectParam = Expression.Parameter(GetType(Object))
|
|
Dim propertyValueParam As ParameterExpression
|
|
Dim valueExpression As Expression
|
|
If propertyInfo.PropertyType Is GetType(TProperty) Then
|
|
propertyValueParam = Expression.Parameter(propertyInfo.PropertyType)
|
|
valueExpression = propertyValueParam
|
|
Else
|
|
propertyValueParam = Expression.Parameter(GetType(TProperty))
|
|
valueExpression = Expression.Convert(propertyValueParam, propertyInfo.PropertyType)
|
|
End If
|
|
|
|
Dim method = Expression.Lambda(
|
|
Expression.[Call](
|
|
Expression.Convert(sourceObjectParam, source),
|
|
propertyInfo.SetMethod,
|
|
valueExpression),
|
|
sourceObjectParam,
|
|
propertyValueParam).Compile()
|
|
|
|
Return DirectCast(method, Action(Of Object, TProperty))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function PropertySet(source As Type, propertyName As String) As Action(Of Object, Object)
|
|
Return source.PropertySet(Of Object)(propertyName)
|
|
End Function
|
|
|
|
Public Function PropertySet(Of TSource, TProperty)(propertyName As String) As Action(Of TSource, TProperty)
|
|
Dim source = GetType(TSource)
|
|
Dim propertyInfo = GetPropertyInfo(source, propertyName)
|
|
Return DirectCast(propertyInfo.SetMethod.CreateDelegate(GetType(Action(Of TSource, TProperty))), Action(Of TSource, TProperty))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticEventAdd(Of TEvent)(source As Type, eventName As String) As Action(Of EventHandler(Of TEvent))
|
|
Dim eventInfo = source.GetEvent(eventName)
|
|
If eventInfo Is Nothing Then
|
|
eventInfo = source.GetEvent(eventName, BindingFlags.NonPublic)
|
|
End If
|
|
If eventInfo Is Nothing Then
|
|
eventInfo = source.GetEvent(eventName, BindingFlags.NonPublic Or BindingFlags.[Public])
|
|
End If
|
|
Return DirectCast(eventInfo.AddMethod.CreateDelegate(GetType(Action(Of EventHandler(Of TEvent)))), Action(Of EventHandler(Of TEvent)))
|
|
End Function
|
|
|
|
Public Function StaticFieldGet(Of TSource, TField)(fieldName As String) As Func(Of TField)
|
|
Dim source = GetType(TSource)
|
|
Return source.StaticFieldGet(Of TField)(fieldName)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticFieldGet(Of TField)(source As Type, fieldName As String) As Func(Of TField)
|
|
Dim fieldInfo = GetStaticFieldInfo(source, fieldName)
|
|
If fieldInfo IsNot Nothing Then
|
|
Dim lambda = Expression.Lambda(Expression.Field(Nothing, fieldInfo))
|
|
Return DirectCast(lambda.Compile(), Func(Of TField))
|
|
End If
|
|
Return Nothing
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticFieldGet(source As Type, fieldName As String) As Func(Of Object)
|
|
Dim fieldInfo = GetStaticFieldInfo(source, fieldName)
|
|
If fieldInfo IsNot Nothing Then
|
|
Dim returnExpression As Expression = Expression.Field(Nothing, fieldInfo)
|
|
If Not fieldInfo.FieldType.IsClass Then
|
|
returnExpression = Expression.Convert(returnExpression, GetType(Object))
|
|
End If
|
|
Dim lambda = Expression.Lambda(returnExpression)
|
|
Return DirectCast(lambda.Compile(), Func(Of Object))
|
|
End If
|
|
Return Nothing
|
|
End Function
|
|
|
|
<Obsolete>
|
|
Public Function StaticFieldGetExpr(Of TSource, TField)(fieldName As String) As Func(Of TField)
|
|
Dim source = GetType(TSource)
|
|
Dim lambda = Expression.Lambda(Expression.Field(Nothing, source, fieldName))
|
|
Return DirectCast(lambda.Compile(), Func(Of TField))
|
|
End Function
|
|
|
|
Public Function StaticFieldSet(Of TSource, TField)(fieldName As String) As Action(Of TField)
|
|
Dim source = GetType(TSource)
|
|
Return source.StaticFieldSet(Of TField)(fieldName)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticFieldSet(Of TField)(source As Type, fieldName As String) As Action(Of TField)
|
|
Dim fieldInfo = GetStaticFieldInfo(source, fieldName)
|
|
If fieldInfo IsNot Nothing Then
|
|
Dim valueParam = Expression.Parameter(GetType(TField))
|
|
Dim lambda = Expression.Lambda(GetType(Action(Of TField)), Expression.Assign(Expression.Field(Nothing, fieldInfo), valueParam), valueParam)
|
|
Return DirectCast(lambda.Compile(), Action(Of TField))
|
|
End If
|
|
Return Nothing
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticFieldSet(source As Type, fieldName As String) As Action(Of Object)
|
|
Dim fieldInfo = GetStaticFieldInfo(source, fieldName)
|
|
If fieldInfo IsNot Nothing AndAlso Not fieldInfo.IsInitOnly Then
|
|
Dim valueParam = Expression.Parameter(GetType(Object))
|
|
Dim convertedValueExpr = Expression.Convert(valueParam, fieldInfo.FieldType)
|
|
Dim lambda = Expression.Lambda(GetType(Action(Of Object)), Expression.Assign(Expression.Field(Nothing, fieldInfo), convertedValueExpr), valueParam)
|
|
Return DirectCast(lambda.Compile(), Action(Of Object))
|
|
End If
|
|
Return Nothing
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticGenericMethod(source As Type, name As String, paramsTypes As Type(), typeParams As Type()) As Func(Of Object(), Object)
|
|
Return StaticMethod(Of Func(Of Object(), Object))(source, name, typeParams, paramsTypes)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticGenericMethodVoid(source As Type, name As String, paramsTypes As Type(), typeParams As Type()) As Action(Of Object())
|
|
Return StaticMethod(Of Action(Of Object()))(source, name, typeParams, paramsTypes)
|
|
End Function
|
|
|
|
Public Function StaticMethod(Of TSource, TDelegate As Class)(name As String) As TDelegate
|
|
Return GetType(TSource).StaticMethod(Of TDelegate)(name)
|
|
End Function
|
|
|
|
Public Function StaticMethod(Of TSource, TDelegate As Class, TParam1)(name As String) As TDelegate
|
|
Return GetType(TSource).StaticMethod(Of TDelegate)(name, GetType(TParam1))
|
|
End Function
|
|
|
|
Public Function StaticMethod(Of TSource, TDelegate As Class, TParam1, TParam2)(name As String) As TDelegate
|
|
Return GetType(TSource).StaticMethod(Of TDelegate)(name, GetType(TParam1), GetType(TParam2))
|
|
End Function
|
|
|
|
Public Function StaticMethod(Of TSource, TDelegate As Class, TParam1, TParam2, TParam3)(name As String) As TDelegate
|
|
Return GetType(TSource).StaticMethod(Of TDelegate)(name, GetType(TParam1), GetType(TParam2), GetType(TParam3))
|
|
End Function
|
|
|
|
Public Function StaticMethod(Of TSource, TDelegate As Class)(name As String, ParamArray typeParameters As Type()) As TDelegate
|
|
Return GetType(TSource).StaticMethod(Of TDelegate)(name, typeParameters)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticMethod(Of TDelegate As Class, TParam1)(source As Type, name As String) As TDelegate
|
|
Return source.StaticMethod(Of TDelegate)(name, GetType(TParam1))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticMethod(Of TDelegate As Class, TParam1, TParam2)(source As Type, name As String) As TDelegate
|
|
Return source.StaticMethod(Of TDelegate)(name, GetType(TParam1), GetType(TParam2))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticMethod(Of TDelegate As Class, TParam1, TParam2, TParam3)(source As Type, name As String) As TDelegate
|
|
Return source.StaticMethod(Of TDelegate)(name, GetType(TParam1), GetType(TParam2), GetType(TParam3))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticMethod(Of TDelegate As Class)(source As Type, name As String, ParamArray typeParameters As Type()) As TDelegate
|
|
Dim paramsTypes = GetFuncDelegateArguments(Of TDelegate)()
|
|
Dim methodInfo = GetStaticMethodInfo(source, name, paramsTypes, typeParameters)
|
|
Return TryCast(methodInfo.CreateDelegate(GetType(TDelegate)), TDelegate)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticMethod(Of TDelegate As Class)(source As Type, name As String) As TDelegate
|
|
Return source.StaticMethod(Of TDelegate)(name, Nothing)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticMethod(source As Type, name As String, ParamArray paramsTypes As Type()) As Func(Of Object(), Object)
|
|
Return StaticMethod(Of Func(Of Object(), Object))(source, name, Nothing, paramsTypes)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticMethod(Of TDelegate As Class)(source As Type, name As String, typeParams As Type(), paramsTypes As Type()) As TDelegate
|
|
Dim methodInfo = GetStaticMethodInfo(source, name, paramsTypes, typeParams)
|
|
If methodInfo Is Nothing Then
|
|
Return Nothing
|
|
End If
|
|
Dim argsArray = Expression.Parameter(GetType(Object()))
|
|
Dim paramsExpression = New Expression(paramsTypes.Length - 1) {}
|
|
For i As Integer = 0 To paramsTypes.Length - 1
|
|
Dim argType = paramsTypes(i)
|
|
paramsExpression(i) = Expression.Convert(Expression.ArrayIndex(argsArray, Expression.Constant(i)), argType)
|
|
Next
|
|
Dim returnExpression As Expression = Expression.[Call](methodInfo, paramsExpression)
|
|
If methodInfo.ReturnType IsNot GetType(System.Void) AndAlso Not methodInfo.ReturnType.IsClass Then
|
|
returnExpression = Expression.Convert(returnExpression, GetType(Object))
|
|
End If
|
|
Return TryCast(Expression.Lambda(returnExpression, argsArray).Compile(), TDelegate)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticMethodVoid(source As Type, name As String, ParamArray paramsTypes As Type()) As Action(Of Object())
|
|
Return StaticMethod(Of Action(Of Object()))(source, name, Nothing, paramsTypes)
|
|
End Function
|
|
|
|
Public Function StaticPropertyGet(Of TSource, TProperty)(propertyName As String) As Func(Of TProperty)
|
|
Return GetType(TSource).StaticPropertyGet(Of TProperty)(propertyName)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticPropertyGet(Of TProperty)(source As Type, propertyName As String) As Func(Of TProperty)
|
|
Dim propertyInfo = GetStaticPropertyInfo(source, propertyName)
|
|
Return DirectCast(propertyInfo.GetMethod.CreateDelegate(GetType(Func(Of TProperty))), Func(Of TProperty))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticPropertyGet(source As Type, propertyName As String) As Func(Of Object)
|
|
Dim propertyInfo = GetStaticPropertyInfo(source, propertyName)
|
|
If propertyInfo.GetMethod Is Nothing Then
|
|
Return Nothing
|
|
End If
|
|
Dim returnExpression As Expression = Expression.[Call](propertyInfo.GetMethod)
|
|
If Not propertyInfo.PropertyType.IsClass Then
|
|
returnExpression = Expression.Convert(returnExpression, GetType(Object))
|
|
End If
|
|
Return DirectCast(Expression.Lambda(returnExpression).Compile(), Func(Of Object))
|
|
End Function
|
|
|
|
<Obsolete>
|
|
<Extension>
|
|
Public Function StaticPropertyGet2(Of TProperty)(source As Type, propertyName As String) As Func(Of TProperty)
|
|
Dim te = Expression.Lambda(Expression.[Property](Nothing, source, propertyName))
|
|
Return DirectCast(te.Compile(), Func(Of TProperty))
|
|
End Function
|
|
|
|
Public Function StaticPropertySet(Of TSource, TProperty)(propertyName As String) As Action(Of TProperty)
|
|
Return GetType(TSource).StaticPropertySet(Of TProperty)(propertyName)
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticPropertySet(Of TProperty)(source As Type, propertyName As String) As Action(Of TProperty)
|
|
Dim propertyInfo = GetStaticPropertyInfo(source, propertyName)
|
|
Return DirectCast(propertyInfo.SetMethod.CreateDelegate(GetType(Action(Of TProperty))), Action(Of TProperty))
|
|
End Function
|
|
|
|
<Extension>
|
|
Public Function StaticPropertySet(source As Type, propertyName As String) As Action(Of Object)
|
|
Dim propertyInfo = GetStaticPropertyInfo(source, propertyName)
|
|
If propertyInfo.GetMethod Is Nothing Then
|
|
Return Nothing
|
|
End If
|
|
Dim valueParam = Expression.Parameter(GetType(Object))
|
|
Dim convertedValue = Expression.Convert(valueParam, propertyInfo.PropertyType)
|
|
Dim returnExpression As Expression = Expression.[Call](propertyInfo.SetMethod, convertedValue)
|
|
If Not propertyInfo.PropertyType.IsClass Then
|
|
returnExpression = Expression.Convert(returnExpression, GetType(Object))
|
|
End If
|
|
Return DirectCast(Expression.Lambda(returnExpression, valueParam).Compile(), Action(Of Object))
|
|
End Function
|
|
|
|
Private Function EventAccessor(Of TEventArgs)(source As Type, eventName As String, accessorName As String) As Action(Of Object, EventHandler(Of TEventArgs))
|
|
Dim accessor = GetEventInfoAccessor(eventName, source, accessorName)
|
|
If accessor IsNot Nothing Then
|
|
Dim instanceParameter = Expression.Parameter(GetType(Object))
|
|
Dim delegateTypeParameter = Expression.Parameter(GetType(EventHandler(Of TEventArgs)))
|
|
Dim lambda = Expression.Lambda(Expression.[Call](Expression.Convert(instanceParameter, source), accessor, delegateTypeParameter), instanceParameter, delegateTypeParameter)
|
|
Return DirectCast(lambda.Compile(), Action(Of Object, EventHandler(Of TEventArgs)))
|
|
End If
|
|
Return Nothing
|
|
End Function
|
|
|
|
Private Function EventAccessor(Of TSource, TEventArgs)(eventName As String, accessorName As String) As Action(Of TSource, EventHandler(Of TEventArgs))
|
|
Dim sourceType = GetType(TSource)
|
|
Dim accessor = GetEventInfoAccessor(eventName, sourceType, accessorName)
|
|
Return DirectCast(accessor.CreateDelegate(GetType(Action(Of TSource, EventHandler(Of TEventArgs)))), Action(Of TSource, EventHandler(Of TEventArgs)))
|
|
End Function
|
|
|
|
Private Function EventAccessorImpl(Of TDelegate As Class)(source As Type, eventName As String, accessorName As String) As TDelegate
|
|
Dim eventInfo = GetEventInfo(eventName, source)
|
|
If eventInfo IsNot Nothing Then
|
|
Dim accessor = If(accessorName = AddAccessor, eventInfo.AddMethod, eventInfo.RemoveMethod)
|
|
Dim eventArgsType = eventInfo.EventHandlerType.GetGenericArguments()(0)
|
|
Dim instanceParameter = Expression.Parameter(GetType(Object))
|
|
Dim delegateTypeParameter = Expression.Parameter(GetType(Object))
|
|
Dim methodCallExpression = Expression.[Call](EventHandlerFactoryMethodInfo.MakeGenericMethod(eventArgsType, source), delegateTypeParameter, Expression.Constant(accessorName = RemoveAccessor))
|
|
Dim lambda = Expression.Lambda(Expression.[Call](Expression.Convert(instanceParameter, source), accessor, methodCallExpression), instanceParameter, delegateTypeParameter)
|
|
Return TryCast(lambda.Compile(), TDelegate)
|
|
End If
|
|
Return Nothing
|
|
End Function
|
|
|
|
<Extension>
|
|
Private Function EventAddImpl(Of TDelegate As Class)(source As Type, eventName As String) As TDelegate
|
|
Return EventAccessorImpl(Of TDelegate)(source, eventName, AddAccessor)
|
|
End Function
|
|
|
|
<Extension>
|
|
Private Function EventRemoveImpl(Of TDelegate As Class)(source As Type, eventName As String) As TDelegate
|
|
Return EventAccessorImpl(Of TDelegate)(source, eventName, RemoveAccessor)
|
|
End Function
|
|
|
|
Private Function GetConstructorInfo(source As Type, types As Type()) As ConstructorInfo
|
|
Return If((If(source.GetConstructor(BindingFlags.[Public], Nothing, types, Nothing), source.GetConstructor(BindingFlags.NonPublic, Nothing, types, Nothing))), source.GetConstructor(BindingFlags.NonPublic Or BindingFlags.[Public] Or BindingFlags.Instance, Nothing, types, Nothing))
|
|
End Function
|
|
|
|
Private Function GetEventInfo(eventName As String, sourceType As Type) As EventInfo
|
|
Return If((If(sourceType.GetEvent(eventName), sourceType.GetEvent(eventName, BindingFlags.NonPublic))), sourceType.GetEvent(eventName, BindingFlags.NonPublic Or BindingFlags.[Public] Or BindingFlags.Instance))
|
|
End Function
|
|
|
|
Private Function GetEventInfoAccessor(eventName As String, sourceType As Type, accessor As String) As MethodInfo
|
|
Dim eventInfo = GetEventInfo(eventName, sourceType)
|
|
Return If(accessor = AddAccessor, eventInfo.AddMethod, eventInfo.RemoveMethod)
|
|
End Function
|
|
|
|
Private Function GetFieldInfo(source As Type, fieldName As String) As FieldInfo
|
|
Dim fieldInfo = If((If(source.GetField(fieldName), source.GetField(fieldName, BindingFlags.Instance Or BindingFlags.NonPublic))), source.GetField(fieldName, BindingFlags.Instance Or BindingFlags.NonPublic Or BindingFlags.[Public]))
|
|
Return fieldInfo
|
|
End Function
|
|
|
|
Private Function GetFuncDelegateArguments(Of TDelegate As Class)() As Type()
|
|
Dim arguments As IEnumerable(Of Type) = GetType(TDelegate).GenericTypeArguments
|
|
Return arguments.Reverse().Skip(1).Reverse().ToArray()
|
|
End Function
|
|
|
|
Private Function GetFuncDelegateReturnType(Of TDelegate As Class)() As Type
|
|
Return GetType(TDelegate).GenericTypeArguments.Last()
|
|
End Function
|
|
|
|
Private Function GetIndexerPropertyInfo(source As Type, returnType As Type, indexesTypes As Type(), Optional indexerName As String = Nothing) As PropertyInfo
|
|
indexerName = If(indexerName, Item)
|
|
|
|
Dim propertyInfo = If((If(source.GetProperty(indexerName, returnType, indexesTypes), source.GetProperty(indexerName, BindingFlags.NonPublic, Nothing, returnType, indexesTypes, Nothing))), source.GetProperty(indexerName, BindingFlags.NonPublic Or BindingFlags.[Public] Or BindingFlags.Instance, Nothing, returnType, indexesTypes, Nothing))
|
|
If propertyInfo IsNot Nothing Then
|
|
Return propertyInfo
|
|
End If
|
|
Dim indexer = source.GetProperties().FirstOrDefault(Function(p) p.GetIndexParameters().Length > 0)
|
|
Return If(indexer IsNot Nothing, GetIndexerPropertyInfo(source, returnType, indexesTypes, indexer.Name), Nothing)
|
|
End Function
|
|
|
|
Private Function GetMethodInfo(source As Type, name As String, parametersTypes As Type(), Optional typeParameters As Type() = Nothing) As MethodInfo
|
|
Dim methodInfo As MethodInfo = Nothing
|
|
Try
|
|
methodInfo = If((If(source.GetMethod(name, BindingFlags.Instance Or BindingFlags.[Public], Nothing, parametersTypes, Nothing), source.GetMethod(name, BindingFlags.Instance Or BindingFlags.NonPublic, Nothing, parametersTypes, Nothing))), source.GetMethod(name, BindingFlags.Instance Or BindingFlags.NonPublic Or BindingFlags.[Public], Nothing, parametersTypes, Nothing))
|
|
'swallow and test generics
|
|
Catch generatedExceptionName As AmbiguousMatchException
|
|
End Try
|
|
'check for generic methods
|
|
If typeParameters IsNot Nothing Then
|
|
Dim ms = source.GetMethods(BindingFlags.Instance Or BindingFlags.[Public]).Concat(source.GetMethods(BindingFlags.NonPublic Or BindingFlags.Instance)).Concat(source.GetMethods(BindingFlags.[Public] Or BindingFlags.NonPublic Or BindingFlags.Instance))
|
|
For Each m In ms
|
|
If m.Name = name AndAlso m.IsGenericMethod Then
|
|
Dim parameters = m.GetParameters()
|
|
Dim genericArguments = m.GetGenericArguments()
|
|
Dim parametersTypesValid = parameters.Length = parametersTypes.Length
|
|
parametersTypesValid = parametersTypesValid And genericArguments.Length = typeParameters.Length
|
|
If Not parametersTypesValid Then
|
|
Continue For
|
|
End If
|
|
For index As Integer = 0 To parameters.Length - 1
|
|
Dim parameterInfo = parameters(index)
|
|
Dim parameterType = parametersTypes(index)
|
|
If parameterInfo.ParameterType IsNot parameterType AndAlso parameterInfo.ParameterType.IsGenericParameter AndAlso Not parameterInfo.ParameterType.CanBeAssignedFrom(parameterType) Then
|
|
parametersTypesValid = False
|
|
Exit For
|
|
End If
|
|
Next
|
|
For index As Integer = 0 To genericArguments.Length - 1
|
|
Dim genericArgument = genericArguments(index)
|
|
Dim typeParameter = typeParameters(index)
|
|
If Not genericArgument.CanBeAssignedFrom(typeParameter) Then
|
|
parametersTypesValid = False
|
|
Exit For
|
|
End If
|
|
Next
|
|
If parametersTypesValid Then
|
|
methodInfo = m.MakeGenericMethod(typeParameters)
|
|
Exit For
|
|
End If
|
|
End If
|
|
Next
|
|
End If
|
|
Return methodInfo
|
|
End Function
|
|
|
|
Private Function GetPropertyInfo(source As Type, propertyName As String) As PropertyInfo
|
|
Dim propertyInfo = If(source.GetProperty(propertyName), If(source.GetProperty(propertyName, BindingFlags.NonPublic), source.GetProperty(propertyName, BindingFlags.NonPublic Or BindingFlags.[Public] Or BindingFlags.Instance)))
|
|
Return propertyInfo
|
|
End Function
|
|
|
|
Private Function GetStaticFieldInfo(source As Type, fieldName As String) As FieldInfo
|
|
Dim fieldInfo = If((If(source.GetField(fieldName, BindingFlags.[Static]), source.GetField(fieldName, BindingFlags.[Static] Or BindingFlags.NonPublic))), source.GetField(fieldName, BindingFlags.[Static] Or BindingFlags.NonPublic Or BindingFlags.[Public]))
|
|
Return fieldInfo
|
|
End Function
|
|
|
|
Private Function GetStaticMethodInfo(source As Type, name As String, parametersTypes As Type(), Optional typeParameters As Type() = Nothing) As MethodInfo
|
|
Dim methodInfo As MethodInfo = Nothing
|
|
Try
|
|
methodInfo = If((If(source.GetMethod(name, BindingFlags.[Static], Nothing, parametersTypes, Nothing), source.GetMethod(name, BindingFlags.[Static] Or BindingFlags.NonPublic, Nothing, parametersTypes, Nothing))), source.GetMethod(name, BindingFlags.[Static] Or BindingFlags.NonPublic Or BindingFlags.[Public], Nothing, parametersTypes, Nothing))
|
|
'swallow and test generics
|
|
Catch generatedExceptionName As AmbiguousMatchException
|
|
End Try
|
|
'check for generic methods
|
|
If typeParameters IsNot Nothing Then
|
|
Dim ms = source.GetMethods(BindingFlags.[Static]).Concat(source.GetMethods(BindingFlags.NonPublic Or BindingFlags.[Static])).Concat(source.GetMethods(BindingFlags.[Public] Or BindingFlags.NonPublic Or BindingFlags.[Static]))
|
|
For Each m In ms
|
|
If m.Name = name AndAlso m.IsGenericMethod Then
|
|
Dim parameters = m.GetParameters()
|
|
Dim genericArguments = m.GetGenericArguments()
|
|
Dim parametersTypesValid = parameters.Length = parametersTypes.Length
|
|
parametersTypesValid = parametersTypesValid And genericArguments.Length = typeParameters.Length
|
|
If Not parametersTypesValid Then
|
|
Continue For
|
|
End If
|
|
For index As Integer = 0 To parameters.Length - 1
|
|
Dim parameterInfo = parameters(index)
|
|
Dim parameterType = parametersTypes(index)
|
|
If parameterInfo.ParameterType IsNot parameterType AndAlso parameterInfo.ParameterType.IsGenericParameter AndAlso Not parameterInfo.ParameterType.CanBeAssignedFrom(parameterType) Then
|
|
parametersTypesValid = False
|
|
Exit For
|
|
End If
|
|
Next
|
|
For index As Integer = 0 To genericArguments.Length - 1
|
|
Dim genericArgument = genericArguments(index)
|
|
Dim typeParameter = typeParameters(index)
|
|
If Not genericArgument.CanBeAssignedFrom(typeParameter) Then
|
|
parametersTypesValid = False
|
|
Exit For
|
|
End If
|
|
Next
|
|
If parametersTypesValid Then
|
|
methodInfo = m.MakeGenericMethod(typeParameters)
|
|
Exit For
|
|
End If
|
|
End If
|
|
Next
|
|
End If
|
|
Return methodInfo
|
|
End Function
|
|
|
|
Private Function GetStaticPropertyInfo(source As Type, propertyName As String) As PropertyInfo
|
|
Dim propertyInfo = If((If(source.GetProperty(propertyName, BindingFlags.[Static]), source.GetProperty(propertyName, BindingFlags.[Static] Or BindingFlags.NonPublic))), source.GetProperty(propertyName, BindingFlags.[Static] Or BindingFlags.NonPublic Or BindingFlags.[Public]))
|
|
Return propertyInfo
|
|
End Function
|
|
|
|
Private Function PropertyGet(Of TSource, TProperty)(Optional propertyName As String = Nothing, Optional propertyInfo As PropertyInfo = Nothing) As Func(Of TSource, TProperty)
|
|
Dim source = GetType(TSource)
|
|
propertyInfo = If(propertyInfo, GetPropertyInfo(source, propertyName))
|
|
Return DirectCast(propertyInfo.GetMethod.CreateDelegate(GetType(Func(Of TSource, TProperty))), Func(Of TSource, TProperty))
|
|
End Function
|
|
End Module
|
|
End Namespace
|