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#Region "Microsoft.VisualBasic::ed9a194d8b1d9f3b218a5301062a798e, Microsoft.VisualBasic.Core\ComponentModel\DataSource\DataFramework.vb"
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#End Region
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Imports System.Data
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Imports System.Reflection
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Imports System.Runtime.CompilerServices
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Imports Microsoft.VisualBasic.ComponentModel.DataSourceModel.SchemaMaps
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Imports Microsoft.VisualBasic.Language
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Imports Microsoft.VisualBasic.Language.Default
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Imports Microsoft.VisualBasic.Scripting.Runtime.NumberConversionRoutines
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Imports Microsoft.VisualBasic.Serialization
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Namespace ComponentModel.DataSourceModel
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Public Module DataFramework
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Public ReadOnly Property Flags As IReadOnlyDictionary(Of PropertyAccess, Assert(Of PropertyInfo))
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Sub New()
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Flags = New Dictionary(Of PropertyAccess, Assert(Of PropertyInfo)) From {
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_
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{PropertyAccess.Readable, Function(p) p.CanRead},
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{PropertyAccess.ReadWrite, Function(p) p.CanRead AndAlso p.CanWrite},
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{PropertyAccess.Writeable, Function(p) p.CanWrite}
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}
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End Sub
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Public Function Schema(Of T)(flag As PropertyAccess,
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Optional nonIndex As Boolean = False,
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Optional primitive As Boolean = False) As Dictionary(Of String, PropertyInfo)
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With GetType(T).Schema(flag,, nonIndex)
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If primitive Then
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Return .Keys _
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.Where(Function(k)
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Return .ByRef(k).PropertyType.IsPrimitive
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End Function) _
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.ToDictionary(Function(key) key,
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Function(key) .ByRef(key))
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Else
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Return .ByRef
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End If
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End With
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End Function
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Public Const PublicProperty As BindingFlags = BindingFlags.Public Or BindingFlags.Instance
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Public Const PublicShared As BindingFlags = BindingFlags.Public Or BindingFlags.Static
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<Extension>
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Public Function Schema(type As Type, flag As PropertyAccess,
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Optional binds As BindingFlags = PublicProperty,
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Optional nonIndex As Boolean = False) As Dictionary(Of String, PropertyInfo)
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Dim props As IEnumerable(Of PropertyInfo) =
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type _
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.GetProperties(binds) _
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.ToArray
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props = props _
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.Where(Flags(flag).AsLambda) _
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.ToArray
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If nonIndex Then
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props = props _
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.Where(Function(p) p.GetIndexParameters.IsNullOrEmpty)
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End If
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Return props.ToDictionary(Function(x) x.Name)
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End Function
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ReadOnly alwaysTrue As DefaultValue(Of Assert(Of Object)) = New Assert(Of Object)(Function() True)
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<Extension>
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Public Function DictionaryTable(Of T)(x As T,
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Optional primitiveType As Boolean = False,
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Optional where As Assert(Of Object) = Nothing) As Dictionary(Of String, String)
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Dim schema As Dictionary(Of String, PropertyInfo) = GetType(T).getOrCache
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Dim table As New Dictionary(Of String, String)
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Dim obj
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where = where Or alwaysTrue
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If primitiveType Then
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For Each key As String In schema.Keys.ToArray
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If Not schema(key).PropertyType.IsPrimitive Then
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Call schema.Remove(key)
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End If
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Next
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End If
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For Each key As String In schema.Keys
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obj = schema(key).GetValue(x)
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If where(obj) Then
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table(key) = Scripting.ToString(obj)
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End If
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Next
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Return table
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function ValueTable(Of T)(x As T) As Dictionary(Of String, Object)
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Return GetType(T).getOrCache _
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.ToDictionary(Function(p) p.Key,
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Function(p)
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Return p.Value.GetValue(x)
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End Function)
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End Function
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<Extension>
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Private Function getOrCache(type As Type) As Dictionary(Of String, PropertyInfo)
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Static schemaCache As New Dictionary(Of Type, Dictionary(Of String, PropertyInfo))
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If Not schemaCache.ContainsKey(type) Then
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schemaCache(type) = type.Schema(
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PropertyAccess.Readable,
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PublicProperty,
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nonIndex:=True
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)
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End If
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Return New Dictionary(Of String, PropertyInfo)(schemaCache(type))
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End Function
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#If NET_40 = 0 Then
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Public ReadOnly Property StringParsers As New Dictionary(Of Type, IStringParser) From {
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_
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{GetType(String), Function(strValue As String) strValue},
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{GetType(Boolean), AddressOf ParseBoolean},
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{GetType(DateTime), Function(strValue As String) CType(strValue, DateTime)},
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{GetType(Double), AddressOf Val},
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{GetType(Integer), Function(strValue As String) CInt(strValue)},
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{GetType(Long), Function(strValue As String) CLng(strValue)},
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{GetType(Single), Function(s) CSng(Val(s))},
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{GetType(Char), Function(s) s.FirstOrDefault}
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}
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Public ReadOnly Property StringBuilders As New Dictionary(Of Type, IStringBuilder) From {
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_
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{GetType(String), Function(s) If(s Is Nothing, "", CStr(s))},
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{GetType(Boolean), AddressOf DataFramework.valueToString},
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{GetType(DateTime), AddressOf DataFramework.valueToString},
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{GetType(Double), AddressOf DataFramework.valueToString},
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{GetType(Integer), AddressOf DataFramework.valueToString},
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{GetType(Long), AddressOf DataFramework.valueToString},
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{GetType(Byte), AddressOf DataFramework.valueToString},
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{GetType(ULong), AddressOf DataFramework.valueToString},
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{GetType(UInteger), AddressOf DataFramework.valueToString},
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{GetType(Short), AddressOf DataFramework.valueToString},
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{GetType(UShort), AddressOf DataFramework.valueToString},
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{GetType(Char), AddressOf DataFramework.valueToString},
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{GetType(Single), AddressOf DataFramework.valueToString},
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{GetType(SByte), AddressOf DataFramework.valueToString}
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}
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Public Delegate Function CTypeDynamics(obj As Object, ConvertType As Type) As Object
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Private Function valueToString(o) As String
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Return CStrSafe(o)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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Public Function IsPrimitive(type As Type) As Boolean
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Return StringBuilders.ContainsKey(type)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function IsNumericType(type As Type) As Boolean
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Static numerics As Type() = {
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GetType(Integer), GetType(Long), GetType(Short), GetType(Double), GetType(Byte),
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GetType(UInteger), GetType(ULong), GetType(UShort), GetType(Single), GetType(SByte), GetType(Decimal)
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}
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Return numerics.Any(Function(num) num Is type)
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End Function
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<MethodImpl(MethodImplOptions.AggressiveInlining)>
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<Extension>
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Public Function IsComplexType(type As Type) As Boolean
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Return Not type _
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.Schema(PropertyAccess.NotSure, PublicProperty, True) _
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.Values _
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.Where(Function(t) Not IsPrimitive(t.PropertyType)) _
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.FirstOrDefault Is Nothing
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End Function
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#End If
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Public Function CreateObject(Of T)(source As IEnumerable(Of T)) As DataTable
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Dim columns = __initSchema(GetType(T))
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Dim table As New DataTable
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Dim type As Type
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For Each column In columns.Values
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type = DirectCast(column.member, PropertyInfo).PropertyType
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Call table.Columns.Add(column.Identity, type)
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Next
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Dim fields As IEnumerable(Of BindProperty(Of DataFrameColumnAttribute)) =
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columns.Values
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For Each row As T In source
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Dim LQuery = LinqAPI.Exec(Of Object) _
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_
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() <= From column As BindProperty(Of DataFrameColumnAttribute)
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In fields
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Select column.GetValue(row)
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Call table.Rows.Add(LQuery)
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Next
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Return table
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End Function
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Public Function GetValue(Of T)(DataTable As DataTable) As T()
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Dim Columns = __initSchema(GetType(T))
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Dim rtvlData As T() = New T(DataTable.Rows.Count - 1) {}
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Dim i As Integer = 0
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Dim Schema As List(Of KeyValuePair(Of Integer, PropertyInfo)) =
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New List(Of KeyValuePair(Of Integer, PropertyInfo))
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For Each column As DataColumn In DataTable.Columns
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Dim LQuery As BindProperty(Of DataFrameColumnAttribute) =
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LinqAPI.DefaultFirst(Of BindProperty(Of DataFrameColumnAttribute)) <=
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From schemaColumn As BindProperty(Of DataFrameColumnAttribute)
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In Columns.Values
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Where String.Equals(schemaColumn.Identity, column.ColumnName)
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Select schemaColumn
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If Not LQuery.IsNull Then
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Call Schema.Add(New KeyValuePair(Of Integer, PropertyInfo)(column.Ordinal, LQuery.member))
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End If
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Next
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For Each row As DataRow In DataTable.Rows
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Dim obj As T = Activator.CreateInstance(Of T)()
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For Each column In Schema
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Dim value = row.Item(column.Key)
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If IsDBNull(value) OrElse value Is Nothing Then
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Continue For
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End If
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Call column.Value.SetValue(obj, value, Nothing)
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Next
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rtvlData(i) = obj
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i += 1
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Next
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Return rtvlData
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End Function
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Private Function __initSchema(type As Type) As Dictionary(Of String, BindProperty(Of DataFrameColumnAttribute))
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Dim dataType As Type = GetType(DataFrameColumnAttribute)
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Dim props As PropertyInfo() = type.GetProperties
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Dim Columns = (From [property] As PropertyInfo
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In props
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Let attrs As Object() = [property].GetCustomAttributes(dataType, True)
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Where Not attrs.IsNullOrEmpty
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Select colMaps =
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DirectCast(attrs.First, DataFrameColumnAttribute), [property]
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Order By colMaps.Index Ascending).AsList
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For Each column In Columns
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If String.IsNullOrEmpty(column.colMaps.Name) Then
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Call column.colMaps.SetNameValue(column.property.Name)
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End If
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Next
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Dim unIndexColumn = (From col
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In Columns
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Where col.colMaps.Index <= 0
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Select col
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Order By col.colMaps.Name Ascending).ToArray
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For Each col In unIndexColumn
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Call Columns.Remove(col)
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Call Columns.Add(col)
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Next
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Return Columns.ToDictionary(
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Function(x) x.colMaps.Name,
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Function(x) New BindProperty(Of DataFrameColumnAttribute)(x.colMaps, x.property))
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End Function
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End Module
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End Namespace
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