/
Registry.vb
92 lines (73 loc) · 2.98 KB
/
Registry.vb
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#Region "Microsoft.VisualBasic::0124b5f27111e2adaadc328227661fb0, LINQ\LINQ\Runtime\Registry.vb"
' Author:
'
' asuka (amethyst.asuka@gcmodeller.org)
' xie (genetics@smrucc.org)
' xieguigang (xie.guigang@live.com)
'
' Copyright (c) 2018 GPL3 Licensed
'
'
' GNU GENERAL PUBLIC LICENSE (GPL3)
'
'
' This program 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.
'
' This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
' /********************************************************************************/
' Summaries:
' Class Registry
'
' Function: GetReader, GetTypeCodeName
'
'
' /********************************************************************************/
#End Region
Imports System.Reflection
Imports LINQ.Runtime.Drivers
Imports Microsoft.VisualBasic.Language
Namespace Runtime
Public Class Registry
ReadOnly drivers As New Dictionary(Of String, IDriverLoader)
Public Sub Register(driverDll As String)
Dim assembly As Assembly = Assembly.LoadFile(driverDll)
For Each type As Type In From m As Type
In assembly.GetTypes
Let flag As DriverFlagAttribute = m.GetCustomAttribute(Of DriverFlagAttribute)
Where Not flag Is Nothing
Select m
Dim flag As DriverFlagAttribute = type.GetCustomAttribute(Of DriverFlagAttribute)()
drivers(flag.type) = Function(args)
Return Activator.CreateInstance(type, {args})
End Function
Next
End Sub
Public Function GetTypeCodeName(type As Type) As String
Select Case type
Case GetType(Integer) : Return "i32"
Case GetType(Long) : Return "i64"
Case Else
Throw New MissingPrimaryKeyException
End Select
End Function
Public Function GetReader(type As String, arguments As String()) As DataSourceDriver
If type = "row" Then
Return New DataFrameDriver
ElseIf drivers.ContainsKey(type) Then
Return drivers(type)(arguments)
Else
Throw New MissingPrimaryKeyException(type)
End If
End Function
End Class
Public Delegate Function IDriverLoader(arguments As String()) As DataSourceDriver
End Namespace