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' Error (Exception) Processing for User-Friendly Feedback
' Copyright 2018 Daniel Wagner O. de Medeiros
'
' This file is part of DWSIM.
'
' DWSIM is free software: you can redistribute it and/or modify
' it under the terms of the GNU General Public License as published by
' the Free Software Foundation, either version 3 of the License, or
' (at your option) any later version.
'
' DWSIM is distributed in the hope that it will be useful,
' but WITHOUT ANY WARRANTY; without even the implied warranty of
' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
' GNU General Public License for more details.
'
' You should have received a copy of the GNU General Public License
' along with DWSIM. If not, see <http://www.gnu.org/licenses/>.
Namespace ExceptionProcessing
Public Class ExceptionList
Public Shared Exceptions As New Dictionary(Of String, Exception)
End Class
Public Class ProcessedException
Public Property Name As String = ""
Public Property OriginalDescription As String = ""
Public Property DetailedDescription As String = ""
Public Property CodeLocation As String = ""
Public Property CodeLocationDetails As String = ""
Public Property CallingMethod As String = ""
Public Property UserAction As String = "Please search the Forums for related questions or fill a bug using the Bug Tracking System."
Public Property ExceptionObject As Exception = Nothing
End Class
Public Class ExceptionParser
Public Shared Function ParseException(ex As Exception) As ProcessedException
Dim iex As Exception = Nothing
If TypeOf ex Is AggregateException Then
iex = GetFirstException(ex)
Else
If ex.InnerException IsNot Nothing Then
iex = ex.InnerException
Else
iex = ex
End If
End If
Dim pex As New ProcessedException()
pex.Name = iex.GetType.Name
pex.OriginalDescription = iex.Message
If iex.Data.Contains("DetailedDescription") Then
pex.DetailedDescription = iex.Data("DetailedDescription").ToString()
Else
pex.DetailedDescription = pex.OriginalDescription
End If
If iex.Data.Contains("UserAction") Then
pex.UserAction = iex.Data("UserAction").ToString()
Else
pex.UserAction = "N/A"
End If
pex.ExceptionObject = iex
If iex.StackTrace IsNot Nothing Then
Try
Dim st As New StackTrace(iex, True)
pex.CodeLocation = st.GetFrame(0).GetMethod.Name + " (file '" + st.GetFrame(0).GetFileName + "', line " + st.GetFrame(0).GetFileLineNumber.ToString + ")"
pex.CallingMethod = st.GetFrame(1).GetMethod.Name + " (file '" + st.GetFrame(1).GetFileName + "', line " + st.GetFrame(1).GetFileLineNumber.ToString + ")"
Catch
End Try
End If
Return pex
End Function
Public Shared Function GetFirstException(ex As AggregateException) As Exception
For Each iex In ex.InnerExceptions
If TypeOf iex Is AggregateException Then
For Each iex2 In DirectCast(iex, AggregateException).InnerExceptions
If TypeOf iex2 Is AggregateException Then
For Each iex3 In DirectCast(iex2, AggregateException).InnerExceptions
If TypeOf iex3 Is AggregateException Then
For Each iex4 In DirectCast(iex3, AggregateException).InnerExceptions
If TypeOf iex4 Is AggregateException Then
For Each iex5 In DirectCast(iex4, AggregateException).InnerExceptions
Return iex5.GetBaseException
Next
Else
Return iex3.GetBaseException
End If
Next
Else
Return iex3.GetBaseException
End If
Next
Else
Return iex2.GetBaseException
End If
Next
Else
Return iex.GetBaseException
End If
Next
Return ex.GetBaseException
End Function
Public Shared Sub ProcessAndDisplayException(fsheet As IFlowsheet, exc As Exception)
If TypeOf exc Is AggregateException Then
Dim age = DirectCast(exc, AggregateException)
Dim baseexception As Exception
For Each ex In age.Flatten().InnerExceptions
Dim euid As String = Guid.NewGuid().ToString()
SharedClasses.ExceptionProcessing.ExceptionList.Exceptions.Add(euid, ex)
If TypeOf ex Is AggregateException Then
baseexception = ex.InnerException
For Each iex In DirectCast(ex, AggregateException).Flatten().InnerExceptions
While iex.InnerException IsNot Nothing
baseexception = iex.InnerException
End While
fsheet?.ShowMessage(baseexception.Message.ToString, IFlowsheet.MessageType.GeneralError, euid)
Next
Else
baseexception = ex
If baseexception.InnerException IsNot Nothing Then
While baseexception.InnerException.InnerException IsNot Nothing
baseexception = baseexception.InnerException
If baseexception Is Nothing Then Exit While
If baseexception.InnerException Is Nothing Then Exit While
End While
End If
fsheet?.ShowMessage(baseexception.Message.ToString, IFlowsheet.MessageType.GeneralError, euid)
End If
Next
Else
Dim euid As String = Guid.NewGuid().ToString()
SharedClasses.ExceptionProcessing.ExceptionList.Exceptions.Add(euid, exc)
fsheet?.ShowMessage(exc.Message.ToString, IFlowsheet.MessageType.GeneralError, euid)
End If
End Sub
End Class
End Namespace
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