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'
' LateBinding.vb
'
' Author:
' Boris Kirzner (borisk@mainsoft.com)
'
'
' Copyright (C) 2002-2006 Mainsoft Corporation.
' Copyright (C) 2004-2006 Novell, Inc (http://www.novell.com)
'
' Permission is hereby granted, free of charge, to any person obtaining
' a copy of this software and associated documentation files (the
' "Software"), to deal in the Software without restriction, including
' without limitation the rights to use, copy, modify, merge, publish,
' distribute, sublicense, and/or sell copies of the Software, and to
' permit persons to whom the Software is furnished to do so, subject to
' the following conditions:
'
' The above copyright notice and this permission notice shall be
' included in all copies or substantial portions of the Software.
'
' THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
' EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
' MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
' NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
' LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
' OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
' WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Imports System
Imports System.Reflection
Imports System.Globalization
Imports System.Diagnostics
Namespace Microsoft.VisualBasic.CompilerServices
<System.ComponentModel.EditorBrowsable(ComponentModel.EditorBrowsableState.Never)> _
Public NotInheritable Class LateBinding
Private Shared ReadOnly Property LBinder() As Microsoft.VisualBasic.CompilerServices.LateBinder
Get
Return New LateBinder
End Get
End Property
<DebuggerStepThrough(), DebuggerHidden()> _
Public Shared Sub LateCall(ByVal o As Object, ByVal objType As System.Type, ByVal name As String, ByVal args() As Object, ByVal paramnames() As String, ByVal CopyBack() As Boolean)
LateGet(o, objType, name, args, paramnames, CopyBack)
End Sub
<DebuggerStepThrough(), DebuggerHidden()> _
Public Shared Sub LateIndexSet(ByVal o As Object, ByVal args() As Object, ByVal paramnames() As String)
Dim realType As System.Type = o.GetType()
Dim flags As BindingFlags
If realType.IsArray Then
flags = BindingFlags.IgnoreCase Or BindingFlags.NonPublic Or BindingFlags.Public Or BindingFlags.Instance Or BindingFlags.InvokeMethod
#If TARGET_JVM Then
Dim argsArrUpBound As Integer = args.Length - 1
'FIXME There's a bug in LateBinder that given (Integer(), Object) args brings SetValue(Object,Long()) method,
' resulting in invocation failure. The current workaround is always to cast indices to long.
Dim longIndicesArr(argsArrUpBound - 1) As Long 'args contains (arr.Length - 1) indices + 1 object (value to set)
For i As Integer = 0 To argsArrUpBound - 1
longIndicesArr(i) = CType(args(i), Long)
Next
Dim newArgs(1) As Object 'array containing 2 elements - the array of [long] indices and the value to set.
newArgs(0) = args(argsArrUpBound)
newArgs(1) = longIndicesArr
realType.InvokeMember("SetValue", flags, LBinder, o, newArgs)
#Else
realType.InvokeMember("Set", flags, Nothing, o, args, Nothing, Nothing, Nothing)
#End If
Else
Dim defaultMembers() As MemberInfo = realType.GetDefaultMembers()
flags = BindingFlags.IgnoreCase Or BindingFlags.NonPublic Or BindingFlags.Public Or BindingFlags.Instance Or BindingFlags.SetProperty
realType.InvokeMember(defaultMembers(0).Name, flags, Nothing, o, args, Nothing, Nothing, Nothing)
End If
End Sub
<DebuggerStepThrough(), DebuggerHidden()> _
Public Shared Sub LateIndexSetComplex(ByVal o As Object, ByVal args() As Object, ByVal paramnames() As String, ByVal OptimisticSet As Boolean, ByVal RValueBase As Boolean)
'FIXME
LateIndexSet(o, args, paramnames)
End Sub
<DebuggerStepThrough(), DebuggerHidden()> _
Public Shared Sub LateSet(ByVal o As Object, ByVal objType As System.Type, ByVal name As String, ByVal args() As Object, ByVal paramnames() As String)
Dim realType As System.Type = objType
If realType Is Nothing Then
realType = o.GetType()
End If
Dim flags As BindingFlags
Try 'first try property set
flags = BindingFlags.FlattenHierarchy Or _
BindingFlags.SetField Or _
BindingFlags.SetProperty Or _
BindingFlags.IgnoreCase Or _
BindingFlags.Instance Or _
BindingFlags.NonPublic Or _
BindingFlags.OptionalParamBinding Or _
BindingFlags.Public Or _
BindingFlags.Static
realType.InvokeMember(name, flags, LBinder, o, args, Nothing, Nothing, paramnames)
Return
Catch e As MissingMemberException
End Try
'if failed, try method call
flags = BindingFlags.FlattenHierarchy Or _
BindingFlags.GetField Or _
BindingFlags.GetProperty Or _
BindingFlags.IgnoreCase Or _
BindingFlags.Instance Or _
BindingFlags.InvokeMethod Or _
BindingFlags.NonPublic Or _
BindingFlags.OptionalParamBinding Or _
BindingFlags.Public Or _
BindingFlags.Static
realType.InvokeMember(name, flags, LBinder, o, args, Nothing, Nothing, paramnames)
End Sub
<DebuggerStepThrough(), DebuggerHidden()> _
Public Shared Sub LateSetComplex(ByVal o As Object, ByVal objType As System.Type, ByVal name As String, ByVal args() As Object, ByVal paramnames() As String, ByVal OptimisticSet As Boolean, ByVal RValueBase As Boolean)
'FIXME
Try
LateSet(o, objType, name, args, paramnames)
Catch e As Exception
'suppress
End Try
End Sub
<DebuggerStepThrough(), DebuggerHidden()> _
Public Shared Function LateGet(ByVal o As Object, ByVal objType As System.Type, ByVal name As String, ByVal args() As Object, ByVal paramnames() As String, ByVal CopyBack() As Boolean) As Object
Dim realType As System.Type = objType
If realType Is Nothing Then
realType = o.GetType()
End If
Dim flags As BindingFlags = BindingFlags.FlattenHierarchy Or _
BindingFlags.GetField Or _
BindingFlags.GetProperty Or _
BindingFlags.IgnoreCase Or _
BindingFlags.Instance Or _
BindingFlags.InvokeMethod Or _
BindingFlags.NonPublic Or _
BindingFlags.OptionalParamBinding Or _
BindingFlags.Public Or _
BindingFlags.Static
Try
Dim lb As LateBinder = New LateBinder
Dim result As Object = realType.InvokeMember(name, flags, lb, o, args, Nothing, CultureInfo.CurrentCulture, paramnames)
If (lb.WasIncompleteInvocation) Then
result = lb.InvokeNext.Invoke(result, lb.InvokeNextArgs)
End If
Return result
Catch e As MissingMethodException
'FIXME: should the InvokeMember always call a binder instead of throwing an exceptions
Throw New MissingMemberException
End Try
End Function
<DebuggerStepThrough(), DebuggerHidden()> _
Public Shared Function LateIndexGet(ByVal o As Object, ByVal args() As Object, ByVal paramnames() As String) As Object
Dim realType As System.Type = o.GetType()
Dim flags As BindingFlags
If realType.IsArray Then
flags = BindingFlags.IgnoreCase Or BindingFlags.NonPublic Or BindingFlags.Public Or BindingFlags.Instance Or BindingFlags.InvokeMethod
#If TARGET_JVM Then
Dim indicesUpBound As Integer = args.Length - 1
Dim longIndicesArr(indicesUpBound) As Long
For i As Integer = 0 To indicesUpBound
longIndicesArr(i) = CType(args(i), Long)
Next
Dim newArgs(0) As Object 'array containing a single element - the array of [long] indices
newArgs(0) = longIndicesArr
Return realType.InvokeMember("GetValue", flags, LBinder, o, newArgs)
#Else
Return realType.InvokeMember("Get", flags, New LateBinder, o, args, Nothing, Nothing, Nothing)
#End If
Else
Dim defaultMembers() As MemberInfo = realType.GetDefaultMembers()
flags = BindingFlags.IgnoreCase Or BindingFlags.NonPublic Or BindingFlags.Public Or BindingFlags.Instance Or BindingFlags.InvokeMethod Or BindingFlags.GetProperty
Return realType.InvokeMember(defaultMembers(0).Name, flags, New LateBinder, o, args, Nothing, Nothing, Nothing)
End If
End Function
Private Sub New()
End Sub
End Class
End Namespace
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