| 1 | #Region "Microsoft.VisualBasic::2c7b689e041bbd11e16644e14e0004a8, Microsoft.VisualBasic.Core\ComponentModel\DataSource\Property\DynamicProperty.vb" |
| 2 | |
| 3 | ' Author: |
| 4 | ' |
| 5 | ' asuka (amethyst.asuka@gcmodeller.org) |
| 6 | ' xie (genetics@smrucc.org) |
| 7 | ' xieguigang (xie.guigang@live.com) |
| 8 | ' |
| 9 | ' Copyright (c) 2018 GPL3 Licensed |
| 10 | ' |
| 11 | ' |
| 12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
| 13 | ' |
| 14 | ' |
| 15 | ' This program is free software: you can redistribute it and/or modify |
| 16 | ' it under the terms of the GNU General Public License as published by |
| 17 | ' the Free Software Foundation, either version 3 of the License, or |
| 18 | ' (at your option) any later version. |
| 19 | ' |
| 20 | ' This program is distributed in the hope that it will be useful, |
| 21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | ' GNU General Public License for more details. |
| 24 | ' |
| 25 | ' You should have received a copy of the GNU General Public License |
| 26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 27 | |
| 28 | |
| 29 | |
| 30 | ' /********************************************************************************/ |
| 31 | |
| 32 | ' Summaries: |
| 33 | |
| 34 | ' Class DynamicPropertyBase |
| 35 | ' |
| 36 | ' Properties: MyHashCode, Properties |
| 37 | ' |
| 38 | ' Function: EnumerateKeys, HasProperty, ToString |
| 39 | ' |
| 40 | ' |
| 41 | ' /********************************************************************************/ |
| 42 | |
| 43 | #End Region |
| 44 | |
| 45 | Imports System.Runtime.CompilerServices |
| 46 | Imports System.Xml.Serialization |
| 47 | Imports Microsoft.VisualBasic.Language |
| 48 | Imports Microsoft.VisualBasic.Linq |
| 49 | |
| 50 | Namespace ComponentModel.DataSourceModel |
| 51 | |
| 52 | ''' <summary> |
| 53 | ''' This abstract object has a <see cref="propertyTable"/> dictionary keeps as |
| 54 | ''' a dynamics property source. |
| 55 | ''' </summary> |
| 56 | ''' <typeparam name="T"></typeparam> |
| 57 | Public MustInherit Class DynamicPropertyBase(Of T) |
| 58 | Implements IDynamicMeta(Of T) |
| 59 | |
| 60 | ''' <summary> |
| 61 | ''' The dynamics property object with specific type of value. |
| 62 | ''' </summary> |
| 63 | ''' <returns></returns> |
| 64 | ''' <remarks>Can not serialize the dictionary object in to xml document.</remarks> |
| 65 | <XmlIgnore> Public Overridable Property Properties As Dictionary(Of String, T) Implements IDynamicMeta(Of T).Properties |
| 66 | Get |
| 67 | If propertyTable Is Nothing Then |
| 68 | propertyTable = New Dictionary(Of String, T) |
| 69 | End If |
| 70 | Return propertyTable |
| 71 | End Get |
| 72 | Set(value As Dictionary(Of String, T)) |
| 73 | propertyTable = value |
| 74 | End Set |
| 75 | End Property |
| 76 | |
| 77 | ''' <summary> |
| 78 | ''' 动态属性表 |
| 79 | ''' </summary> |
| 80 | Dim propertyTable As Dictionary(Of String, T) |
| 81 | |
| 82 | ''' <summary> |
| 83 | ''' Gets/sets item value by using property name. |
| 84 | ''' (这个函数为安全的函数,当目标属性不存在的时候,会返回空值) |
| 85 | ''' </summary> |
| 86 | ''' <param name="name"></param> |
| 87 | ''' <returns></returns> |
| 88 | Default Public Overloads Property ItemValue(name$) As T |
| 89 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 90 | Get |
| 91 | If Properties.ContainsKey(name) Then |
| 92 | Return Properties(name) |
| 93 | Else |
| 94 | Return Nothing |
| 95 | End If |
| 96 | End Get |
| 97 | Set(value As T) |
| 98 | Properties(name) = value |
| 99 | End Set |
| 100 | End Property |
| 101 | |
| 102 | ''' <summary> |
| 103 | ''' Get a value package at once using a key collection, |
| 104 | ''' if the key is not exists in the property, then its |
| 105 | ''' correspoding value is nothing. |
| 106 | ''' </summary> |
| 107 | ''' <param name="keys"></param> |
| 108 | ''' <returns></returns> |
| 109 | Default Public Overloads Property ItemValue(keys As IEnumerable(Of String)) As T() |
| 110 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 111 | Get |
| 112 | Return keys.Select(Function(s) Me(s)).ToArray |
| 113 | End Get |
| 114 | Set(value As T()) |
| 115 | For Each key As SeqValue(Of String) In keys.SeqIterator |
| 116 | Me(key.value) = value(key) |
| 117 | Next |
| 118 | End Set |
| 119 | End Property |
| 120 | |
| 121 | ''' <summary> |
| 122 | ''' Determines whether the System.Collections.Generic.Dictionary`2 contains the specified |
| 123 | ''' key. |
| 124 | ''' </summary> |
| 125 | ''' <param name="name$">The key to locate in the System.Collections.Generic.Dictionary`2.</param> |
| 126 | ''' <returns> |
| 127 | ''' true if the System.Collections.Generic.Dictionary`2 contains an element with |
| 128 | ''' the specified key; otherwise, false. |
| 129 | ''' </returns> |
| 130 | Public Function HasProperty(name$) As Boolean |
| 131 | If propertyTable Is Nothing Then |
| 132 | Return False |
| 133 | Else |
| 134 | Return propertyTable.ContainsKey(name) |
| 135 | End If |
| 136 | End Function |
| 137 | |
| 138 | ''' <summary> |
| 139 | ''' 枚举这个动态字典类型之中的所有的键名,这个函数是默认不包含有类型自有的属性名称的 |
| 140 | ''' </summary> |
| 141 | ''' <param name="joinProperties">是否包括属性名称,默认不包含</param> |
| 142 | ''' <returns></returns> |
| 143 | Public Function EnumerateKeys(Optional joinProperties As Boolean = False) As String() |
| 144 | Dim out As New List(Of String) |
| 145 | |
| 146 | If joinProperties Then |
| 147 | out += MyClass.GetType _ |
| 148 | .GetProperties(PublicProperty) _ |
| 149 | .Where(Function(p) p.GetIndexParameters.IsNullOrEmpty) _ |
| 150 | .Select(Function(p) p.Name) _ |
| 151 | .ToArray |
| 152 | End If |
| 153 | |
| 154 | If Not propertyTable Is Nothing Then |
| 155 | out += propertyTable.Keys |
| 156 | End If |
| 157 | |
| 158 | Return out.Distinct.ToArray |
| 159 | End Function |
| 160 | |
| 161 | Public Overrides Function ToString() As String |
| 162 | Return $"{Properties.Count} Property(s)." |
| 163 | End Function |
| 164 | |
| 165 | ''' <summary> |
| 166 | ''' Using for debugger view, this property is usually usefull for the dictionary view |
| 167 | ''' to see if any duplicated was existed? |
| 168 | ''' </summary> |
| 169 | ''' <returns></returns> |
| 170 | Protected Overridable ReadOnly Property MyHashCode As Integer |
| 171 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 172 | Get |
| 173 | Return GetHashCode() |
| 174 | End Get |
| 175 | End Property |
| 176 | |
| 177 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
| 178 | Public Shared Narrowing Operator CType(dynamic As DynamicPropertyBase(Of T)) As Func(Of String, T) |
| 179 | Return Function(pName$) dynamic(pName) |
| 180 | End Operator |
| 181 | End Class |
| 182 | End Namespace |