1 #region MIT license
2 //
3 // MIT license
4 //
5 // Copyright (c) 2007-2008 Jiri Moudry, Pascal Craponne
6 //
7 // Permission is hereby granted, free of charge, to any person obtaining a copy
8 // of this software and associated documentation files (the "Software"), to deal
9 // in the Software without restriction, including without limitation the rights
10 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 // copies of the Software, and to permit persons to whom the Software is
12 // furnished to do so, subject to the following conditions:
13 //
14 // The above copyright notice and this permission notice shall be included in
15 // all copies or substantial portions of the Software.
16 //
17 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 // THE SOFTWARE.
24 //
25 #endregion
26 
27 using System;
28 using System.Data;
29 
30 namespace DbLinq.Data.Linq.Database.Implementation
31 {
32     /// <summary>
33     /// Database connection allows to open a connection if none available
34     /// </summary>
35     internal class DatabaseConnection: IDisposable
36     {
37         private readonly IDbConnection _connection;
38         private readonly bool _mustClose;
39 
40         /// <summary>
41         /// Initializes a new instance of the <see cref="DatabaseConnection"/> class.
42         /// </summary>
43         /// <param name="connection">The connection.</param>
DatabaseConnection(IDbConnection connection)44         public DatabaseConnection(IDbConnection connection)
45         {
46             _connection = connection;
47             switch (_connection.State)
48             {
49             case ConnectionState.Open:
50                 _mustClose = false;
51                 break;
52             case ConnectionState.Closed:
53                 _mustClose = true;
54                 break;
55             default:
56                 throw new ApplicationException("L33: Can only handle Open or Closed connection states, not " + _connection.State);
57             }
58             if (_mustClose)
59                 _connection.Open();
60         }
61 
62         /// <summary>
63         /// Disposes current connection, if owned.
64         /// </summary>
Dispose()65         public void Dispose()
66         {
67             if (_mustClose)
68                 _connection.Close();
69         }
70     }
71 }
72