1 | #Region "Microsoft.VisualBasic::905e5cd916322d64cd29028dbf3d0ce8, Microsoft.VisualBasic.Core\ComponentModel\SingletonHolder.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 SingletonHolder |
35 | ' |
36 | ' Properties: Instance |
37 | ' |
38 | ' Constructor: (+1 Overloads) Sub New |
39 | ' |
40 | ' |
41 | ' /********************************************************************************/ |
42 | |
43 | #End Region |
44 | |
45 | '! |
46 | '@file SingletonHolder.cs |
47 | '@author Woong Gyu La a.k.a Chris. <juhgiyo@gmail.com> |
48 | ' <http://github.com/juhgiyo/epForceDirectedGraph.cs> |
49 | '@date September 27, 2013 |
50 | '@brief SingletonHolder Interface |
51 | '@version 2.0 |
52 | ' '@section LICENSE |
53 | ' 'The MIT License (MIT) |
54 | ' 'Copyright (c) 2013 Woong Gyu La <juhgiyo@gmail.com> |
55 | ' 'Permission is hereby granted, free of charge, to any person obtaining a copy |
56 | 'of this software and associated documentation files (the "Software"), to deal |
57 | 'in the Software without restriction, including without limitation the rights |
58 | 'to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
59 | 'copies of the Software, and to permit persons to whom the Software is |
60 | 'furnished to do so, subject to the following conditions: |
61 | ' 'The above copyright notice and this permission notice shall be included in |
62 | 'all copies or substantial portions of the Software. |
63 | ' 'THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
64 | 'IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
65 | 'FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
66 | 'AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
67 | 'LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
68 | 'OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
69 | 'THE SOFTWARE. |
70 | ' '@section DESCRIPTION |
71 | ' 'An Interface for the SingletonHolder Class. |
72 | ' ' |
73 | |
74 | Imports System.Runtime.CompilerServices |
75 | |
76 | Namespace ComponentModel |
77 | |
78 | ''' <summary> |
79 | ''' An Interface for the SingletonHolder Class.(存储单体模式的对象实例) |
80 | ''' </summary> |
81 | ''' <typeparam name="T">泛型T必须是含有一个无参数的构造函数的</typeparam> |
82 | Public NotInheritable Class SingletonHolder(Of T As New) |
83 | |
84 | Shared _instance As T |
85 | |
86 | Private Sub New() |
87 | End Sub |
88 | |
89 | ''' <summary> |
90 | ''' 目标类型的唯一单个实例 |
91 | ''' </summary> |
92 | ''' <returns></returns> |
93 | Public Shared ReadOnly Property Instance() As T |
94 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
95 | Get |
96 | If _instance Is Nothing Then |
97 | _instance = New T() |
98 | End If |
99 | Return _instance |
100 | End Get |
101 | End Property |
102 | End Class |
103 | End Namespace |