1 | #Region "Microsoft.VisualBasic::8f5dc2d2723bf368ee62ccf0148ba17d, Microsoft.VisualBasic.Core\ComponentModel\DataSource\DefaultAttribute.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 DefaultAttribute |
35 | ' |
36 | ' Constructor: (+1 Overloads) Sub New |
37 | ' Function: GetDefaultAttribute, GetDefaultValues, ToString |
38 | ' |
39 | ' |
40 | ' /********************************************************************************/ |
41 | |
42 | #End Region |
43 | |
44 | Imports System.ComponentModel |
45 | Imports System.Reflection |
46 | Imports System.Runtime.CompilerServices |
47 | Imports Microsoft.VisualBasic.Scripting |
48 | |
49 | Namespace ComponentModel.DataSourceModel |
50 | |
51 | ''' <summary> |
52 | ''' Property default value |
53 | ''' </summary> |
54 | <AttributeUsage(AttributeTargets.Property, AllowMultiple:=False, Inherited:=True)> |
55 | Public Class DefaultAttribute : Inherits DefaultValueAttribute |
56 | |
57 | Sub New(value As Object) |
58 | Call MyBase.New(value) |
59 | End Sub |
60 | |
61 | Public Overrides Function ToString() As String |
62 | Return InputHandler.ToString(Value) |
63 | End Function |
64 | |
65 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
66 | Public Shared Function GetDefaultValues(type As Type) As Dictionary(Of String, Object) |
67 | Return type.Schema(PropertyAccess.Readable, PublicProperty, nonIndex:=True) _ |
68 | .ToDictionary(Function(p) p.Value.Name, |
69 | Function(p) |
70 | Return GetDefaultAttribute(p.Value)?.Value |
71 | End Function) |
72 | End Function |
73 | |
74 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
75 | Public Shared Function GetDefaultAttribute([property] As PropertyInfo) As DefaultValueAttribute |
76 | Return [property] _ |
77 | .GetCustomAttributes(Of DefaultValueAttribute)(inherit:=True) _ |
78 | .FirstOrDefault |
79 | End Function |
80 | End Class |
81 | End Namespace |