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105 lines
4.4 KiB
105 lines
4.4 KiB
#Region "Microsoft.VisualBasic::6776afaa08f5c6cf2472d36d3f435a6a, XDRStream\Writing\WriteBuilder.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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' Class WriteBuilder
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'
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' Constructor: (+1 Overloads) Sub New
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' Function: Create, EmitCreater, Map, MapFix, MapVar
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'
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'
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' /********************************************************************************/
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#End Region
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Imports System.IO.XDR.Emit
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Imports System.Reflection
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Imports System.Reflection.Emit
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Imports Microsoft.VisualBasic.Data.IO
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Namespace Writing
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Partial Public NotInheritable Class WriteBuilder
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Private _wm As WriteMapper
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Private _creater As Func(Of IByteWriter, Writer)
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Private _modBuilder As ModuleBuilder
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Private _buildBinderDescription As BuildBinderDescription
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Private _oneCacheDescription As StaticCacheDescription
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Private _varCacheDescription As StaticCacheDescription
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Private _fixCacheDescription As StaticCacheDescription
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Public Sub New()
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Dim name = "DynamicXdrWriteMapper"
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Dim asmName As AssemblyName = New AssemblyName(name)
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Dim asmBuilder = AppDomain.CurrentDomain.DefineDynamicAssembly(asmName, AssemblyBuilderAccess.RunAndSave)
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_modBuilder = asmBuilder.DefineDynamicModule(name & ".dll", name & ".dll")
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_buildBinderDescription = New BuildBinderDescription(_modBuilder)
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_oneCacheDescription = New StaticCacheDescription(_modBuilder, _buildBinderDescription, "OneCache", False, OpaqueType.One)
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_fixCacheDescription = New StaticCacheDescription(_modBuilder, _buildBinderDescription, "FixCache", False, OpaqueType.Fix)
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_varCacheDescription = New StaticCacheDescription(_modBuilder, _buildBinderDescription, "VarCache", False, OpaqueType.Var)
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Dim dynWriteMapperType As Type = EmitDynWriteMapper()
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_wm = CType(Activator.CreateInstance(dynWriteMapperType), WriteMapper)
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Dim dynWriterType As Type = EmitDynWriter()
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Dim mapperInstance = dynWriterType.GetField("Mapper", BindingFlags.Public Or BindingFlags.Static)
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mapperInstance.SetValue(Nothing, _wm)
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_creater = EmitCreater(dynWriterType.GetConstructor(New Type() {GetType(IByteWriter)}))
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End Sub
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Private Shared Function EmitCreater(ci As ConstructorInfo) As Func(Of IByteWriter, Writer)
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Dim dm = New DynamicMethod("DynCreateWriter", GetType(Writer), New Type() {GetType(IByteWriter)}, GetType(WriteBuilder), True)
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Dim il = dm.GetILGenerator()
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il.Emit(OpCodes.Ldarg_0)
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il.Emit(OpCodes.Newobj, ci)
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il.Emit(OpCodes.Ret)
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Return CType(dm.CreateDelegate(GetType(Func(Of IByteWriter, Writer))), Func(Of IByteWriter, Writer))
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End Function
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Public Function Map(Of T)(writer As WriteOneDelegate(Of T)) As WriteBuilder
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_wm.AppendMethod(GetType(T), OpaqueType.One, writer)
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Return Me
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End Function
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Public Function MapFix(Of T)(writer As WriteManyDelegate(Of T)) As WriteBuilder
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_wm.AppendMethod(GetType(T), OpaqueType.Fix, writer)
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Return Me
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End Function
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Public Function MapVar(Of T)(writer As WriteManyDelegate(Of T)) As WriteBuilder
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_wm.AppendMethod(GetType(T), OpaqueType.Var, writer)
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Return Me
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End Function
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Public Function Create(writer As IByteWriter) As Writer
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Return _creater(writer)
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End Function
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End Class
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End Namespace |