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110 lines
3.8 KiB
110 lines
3.8 KiB
#Region "Microsoft.VisualBasic::b0228d2768de06738098e63c6fd239b7, RQL\StorageTek\EntityProvider.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 EntityProvider
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'
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' Properties: MapFileIO, Tek
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'
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' Constructor: (+2 Overloads) Sub New
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' Function: __internalRepository, GetRepository, LinqWhere, ToString
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'
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'
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' /********************************************************************************/
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#End Region
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Imports sciBASIC.ComputingServices.Linq.Framework.DynamicCode
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Imports sciBASIC.ComputingServices.Linq.Framework.Provider
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Imports sciBASIC.ComputingServices.Linq.LDM.Statements.Tokens
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Imports sciBASIC.ComputingServices.Linq.LDM.Statements.Tokens.WhereClosure
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Namespace StorageTek
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''' <summary>
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''' 实体对象，实际上这个模块最主要的功能就是提供数据源的读取方法
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''' </summary>
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Public Class EntityProvider : Inherits TypeEntry
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''' <summary>
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''' 存储的方法
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''' </summary>
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''' <returns></returns>
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Public Property Tek As StorageTeks
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''' <summary>
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''' 映射的实际的存储位置
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''' </summary>
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''' <returns></returns>
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Public Property MapFileIO As String
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Sub New()
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End Sub
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Sub New(Linq As TypeEntry, res As String)
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Call MyBase.New(Linq)
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Tek = StorageTeks.Linq
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MapFileIO = res
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End Sub
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Public Function GetRepository() As IEnumerable
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If Tek = StorageTeks.Linq Then ' 使用的是Linq数据源
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Dim hwnd As GetLinqResource = Me.GetHandle
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Return hwnd(MapFileIO)
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Else
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Return __internalRepository()
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End If
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End Function
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''' <summary>
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''' 系统的自有的数据源方法
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''' </summary>
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''' <returns></returns>
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Private Function __internalRepository() As IEnumerable
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Dim api As IRepository = StorageTek.API.InternalAPIs(Tek) ' 在这里是系统的自有的数据源方法
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Dim type As Type = Me.TypeId.GetType ' 得到元素类型的信息
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Dim source As IEnumerable = api(MapFileIO, type)
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Return source
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End Function
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Public Overrides Function ToString() As String
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Return $"[{Tek.ToString}] {MapFileIO} //{MyBase.ToString}"
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End Function
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Public Function LinqWhere(where As String, compiler As DynamicCompiler) As IEnumerable
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Dim type As Type = Me.GetType
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Dim test As ITest = WhereClosure.CreateLinqWhere(where, type, compiler)
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Dim LQuery = (From x As Object In GetRepository() Where True = test(x) Select x)
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Return LQuery
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End Function
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End Class
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End Namespace
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