1 | #Region "Microsoft.VisualBasic::04f1c568f523034097893e43b84b73af, Microsoft.VisualBasic.Core\ComponentModel\DataSource\Property\NamedValue(Of T).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 | ' Structure NamedValue |
35 | ' |
36 | ' Properties: Description, IsEmpty, Name, Value, ValueType |
37 | ' |
38 | ' Constructor: (+1 Overloads) Sub New |
39 | ' Function: FixValue, ToString |
40 | ' Operators: (+2 Overloads) +, <>, = |
41 | ' |
42 | ' |
43 | ' /********************************************************************************/ |
44 | |
45 | #End Region |
46 | |
47 | Imports System.Runtime.CompilerServices |
48 | Imports System.Web.Script.Serialization |
49 | Imports System.Xml.Serialization |
50 | Imports Microsoft.VisualBasic.ComponentModel.Collection.Generic |
51 | Imports Microsoft.VisualBasic.Language.Default |
52 | Imports Microsoft.VisualBasic.Serialization.JSON |
53 | |
54 | Namespace ComponentModel.DataSourceModel |
55 | |
56 | ''' <summary> |
57 | ''' The value object have a name string.(一个具有自己的名称的变量值) |
58 | ''' </summary> |
59 | ''' <typeparam name="T"></typeparam> |
60 | Public Structure NamedValue(Of T) : Implements INamedValue |
61 | Implements IKeyValuePairObject(Of String, T) |
62 | Implements IsEmpty |
63 | |
64 | ''' <summary> |
65 | ''' Identifier tag data. you can using this property value as a dictionary key. |
66 | ''' </summary> |
67 | ''' <returns></returns> |
68 | <XmlAttribute> |
69 | Public Property Name As String Implements INamedValue.Key, IKeyValuePairObject(Of String, T).Key |
70 | |
71 | ''' <summary> |
72 | ''' Object value |
73 | ''' </summary> |
74 | ''' <returns></returns> |
75 | <XmlElement> Public Property Value As T Implements IKeyValuePairObject(Of String, T).Value |
76 | |
77 | ''' <summary> |
78 | ''' Additional description text about this variable <see cref="Value"/> |
79 | ''' </summary> |
80 | ''' <returns></returns> |
81 | <XmlAttribute> |
82 | Public Property Description As String |
83 | |
84 | ''' <summary> |
85 | ''' Does this object have value? |
86 | ''' </summary> |
87 | ''' <returns></returns> |
88 | <XmlIgnore, ScriptIgnore, DataIgnored> |
89 | Public ReadOnly Property IsEmpty As Boolean Implements IsEmpty.IsEmpty |
90 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
91 | Get |
92 | Return String.IsNullOrEmpty(Name) AndAlso Value Is Nothing |
93 | End Get |
94 | End Property |
95 | |
96 | ''' <summary> |
97 | ''' Returns object gettype |
98 | ''' </summary> |
99 | ''' <returns></returns> |
100 | Public ReadOnly Property ValueType As Type |
101 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
102 | Get |
103 | ' 假若类型参数T是基类型的话,则直接使用GetType(T)只能够得到基类型的信息,无法得到当前的实现类型的信息 |
104 | ' 故而要在这里使用对象自身的GetType方法来获取真正的类型信息 |
105 | Return Value.GetType |
106 | End Get |
107 | End Property |
108 | |
109 | ''' <summary> |
110 | ''' Creates a object bind with a specific <see cref="Name"/>. |
111 | ''' </summary> |
112 | ''' <param name="name"></param> |
113 | ''' <param name="value"></param> |
114 | Sub New(name$, value As T, Optional describ As String = Nothing) |
115 | Me.Name = name |
116 | Me.Value = value |
117 | Me.Description = describ |
118 | End Sub |
119 | |
120 | ''' <summary> |
121 | ''' View object. |
122 | ''' </summary> |
123 | ''' <returns></returns> |
124 | Public Overrides Function ToString() As String |
125 | Try |
126 | ' 2018-4-9 在这里将显示修改为类型的ToString方法,这样子就可以由 |
127 | ' 用户来通过重写ToString方法来自定义显示,而非强制使用GetJson方法 |
128 | ' 将全部的对象都显示出来,对于属性很多的对象GetJson方法显示的效果不是太好 |
129 | If Description.StringEmpty Then |
130 | Return $"{Name} --> {Value.ToString}" |
131 | Else |
132 | Return $"{Name} --> {Value.ToString} ({Description})" |
133 | End If |
134 | Catch ex As Exception |
135 | Return Name |
136 | End Try |
137 | End Function |
138 | |
139 | Public Function FixValue(h As Func(Of T, T)) As NamedValue(Of T) |
140 | Return New NamedValue(Of T)(Name, h(Value)) |
141 | End Function |
142 | |
143 | Public Shared Operator +(obj As NamedValue(Of T)) As T |
144 | Return obj.Value |
145 | End Operator |
146 | |
147 | ''' <summary> |
148 | ''' 这个函数会将<paramref name="value"/>插入为<paramref name="table"/>的第一个元素 |
149 | ''' </summary> |
150 | ''' <param name="value"></param> |
151 | ''' <param name="table"></param> |
152 | ''' <returns></returns> |
153 | Public Shared Operator +(value As NamedValue(Of T), table As Dictionary(Of String, T)) As Dictionary(Of String, T) |
154 | Dim newTable As New Dictionary(Of String, T) From { |
155 | {value.Name, value.Value} |
156 | } |
157 | |
158 | For Each map As KeyValuePair(Of String, T) In table |
159 | Call newTable.Add(map.Key, map.Value) |
160 | Next |
161 | |
162 | Return newTable |
163 | End Operator |
164 | |
165 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
166 | Public Shared Operator =(tuple As NamedValue(Of T), compares As T) As Boolean |
167 | If tuple.Value Is Nothing Then |
168 | If compares Is Nothing Then |
169 | Return True |
170 | Else |
171 | Return False |
172 | End If |
173 | Else |
174 | If compares Is Nothing Then |
175 | Return False |
176 | Else |
177 | Return tuple.Value.Equals(compares) |
178 | End If |
179 | End If |
180 | End Operator |
181 | |
182 | ''' <summary> |
183 | ''' Convert from tuple |
184 | ''' </summary> |
185 | ''' <param name="tuple"></param> |
186 | ''' <returns></returns> |
187 | ''' |
188 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
189 | Public Shared Widening Operator CType(tuple As (name$, value As T)) As NamedValue(Of T) |
190 | Return New NamedValue(Of T)(tuple.name, tuple.value) |
191 | End Operator |
192 | |
193 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
194 | Public Shared Widening Operator CType(tuple As (name$, value As T, describ$)) As NamedValue(Of T) |
195 | Return New NamedValue(Of T)(tuple.name, tuple.value, tuple.describ) |
196 | End Operator |
197 | |
198 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
199 | Public Shared Operator <>(tuple As NamedValue(Of T), compares As T) As Boolean |
200 | Return Not tuple = compares |
201 | End Operator |
202 | End Structure |
203 | End Namespace |