Merge pull request #205 from m3rlinez/master
[mono.git] / mcs / class / System.Data / System.Data.Odbc / OdbcFactory.cs
1 //
2 // System.Data.Odbc.OdbcFactory
3 //
4 // Author:
5 //   Sureshkumar T <tsureshkumar@novell.com>
6 //
7 //
8 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
9 //
10 // Permission is hereby granted, free of charge, to any person obtaining
11 // a copy of this software and associated documentation files (the
12 // "Software"), to deal in the Software without restriction, including
13 // without limitation the rights to use, copy, modify, merge, publish,
14 // distribute, sublicense, and/or sell copies of the Software, and to
15 // permit persons to whom the Software is furnished to do so, subject to
16 // the following conditions:
17 // 
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
20 // 
21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 //
29
30 #if NET_2_0
31
32 #region Using Directives
33 using System;
34 using System.Data;
35 using System.Data.Common;
36 using System.Security;
37 using System.Security.Permissions;
38 #endregion // Using Directives
39
40 namespace System.Data.Odbc 
41 {
42         
43         public sealed class OdbcFactory : DbProviderFactory
44         {
45                 #region Fields
46                 public static readonly OdbcFactory Instance;
47                 static readonly object lockStatic = new object ();
48                 #endregion //Fields
49
50                 #region Constructors
51                 /// <remarks>
52                 /// public static variable Instance should hold the the singleton instance 
53                 /// based on the knowledge that custom factories without this instance variable
54                 /// ms.net  throws exception 
55                 /// <pre>
56                 /// System.InvalidOperationException: The requested .Net Framework Data 
57                 ///             Provider's implementation does not have an Instance field 
58                 ///             of a System.Data.Common.DbProviderFactory derived type.
59                 ///     at System.Data.Common.DbProviderFactories.GetFactory(DataRow providerRow)
60                 ///     at System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName)
61                 /// </pre>
62                 /// </remarks>
63                 static OdbcFactory() 
64                 {
65                         lock (lockStatic) 
66                         {
67                                 if (Instance == null)
68                                         Instance = new OdbcFactory ();
69                         }
70                 }
71                 
72                 private OdbcFactory()
73                 {
74                         
75                 }
76                 
77                 #endregion //Constructors
78
79                 #region Methods
80                 public override DbConnection CreateConnection()
81                 {
82                         return  new OdbcConnection () as DbConnection;
83                 }
84                 
85                 public override DbCommand CreateCommand()
86                 {
87                         return new OdbcCommand () as DbCommand;
88                 }
89                 
90                 public override DbCommandBuilder CreateCommandBuilder()
91                 {
92                         return new OdbcCommandBuilder () as DbCommandBuilder;
93                 }
94                 
95                 
96                 public override DbConnectionStringBuilder CreateConnectionStringBuilder ()
97                 {
98                         return new OdbcConnectionStringBuilder () as DbConnectionStringBuilder;
99                 }
100                 
101                 public override DbDataAdapter CreateDataAdapter()
102                 {
103                         return new OdbcDataAdapter () as DbDataAdapter;
104                 }
105                 
106                 public override DbParameter CreateParameter()
107                 {
108                         return new OdbcParameter () as DbParameter;
109                 }
110
111                 public override CodeAccessPermission CreatePermission (PermissionState state)
112                 {
113                         return new OdbcPermission (state);
114                 }
115
116                 #endregion //Methods
117         }
118 }
119 #endif // NET_2_0