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.Data.ProviderBase;
  37 #endregion // Using Directives
  38
  39 namespace System.Data.Odbc
  40 {
  41
  42         public sealed class OdbcFactory : DbProviderFactory
  43         {
  44                 #region Fields
  45                 public static readonly OdbcFactory Instance;
  46                 #endregion //Fields
  47
  48                 #region Constructors
  49                 /// <remarks>
  50                 /// public static variable Instance should hold the the singleton instance
  51                 /// based on the knowledge that custom factories without this instance variable
  52                 /// ms.net  throws exception
  53                 /// <pre>
  54                 /// System.InvalidOperationException: The requested .Net Framework Data
  55                 ///             Provider's implementation does not have an Instance field
  56                 ///             of a System.Data.Common.DbProviderFactory derived type.
  57                 ///     at System.Data.Common.DbProviderFactories.GetFactory(DataRow providerRow)
  58                 ///     at System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName)
  59                 /// </pre>
  60                 /// </remarks>
  61                 static OdbcFactory()
  62                 {
  63                         lock (typeof (OdbcFactory))
  64                                 {
  65                                         if (Instance == null)
  66                                                 Instance = new OdbcFactory ();
  67                                 }
  68
  69                 }
  70
  71                 private OdbcFactory()
  72                 {
  73
  74                 }
  75
  76                 #endregion //Constructors
  77
  78                 #region Properties
  79                 public override DbProviderSupportedClasses SupportedClasses {
  80                         get {
  81                                 return (DbProviderSupportedClasses) (
  82                                                                      DbProviderSupportedClasses.DbConnection |
  83                                                                      DbProviderSupportedClasses.DbCommand |
  84                                                                      DbProviderSupportedClasses.DbParameter |
  85                                                                      //DbProviderSupportedClasses.DbConnectionStringBuilder |
  86                                                                      DbProviderSupportedClasses.DbCommandBuilder |
  87                                                                      DbProviderSupportedClasses.DbDataAdapter //|
  88                                                                      //DbProviderSupportedClasses.DbDataSourceEnumerator |
  89                                                                      //DbProviderSupportedClasses.CodeAccessPermission
  90                                                                      );
  91                         }
  92                 }
  93
  94                 #endregion //Properties
  95
  96                 #region Methods
  97                 public override DbConnection CreateConnection()
  98                 {
  99                         OdbcConnectionFactory connFactory = OdbcConnectionFactory.GetSingleton (this);
 100                         return  new OdbcConnection (connFactory);
 101                 }
 102
 103                 public override DbCommand CreateCommand()
 104                 {
 105                         return new OdbcCommand ()  as DbCommand;
 106                 }
 107
 108                 public override DbCommandBuilder CreateCommandBuilder()
 109                 {
 110                         return new OdbcCommandBuilder () as DbCommandBuilder;
 111                 }
 112
 113
 114 //                 public override DbConnectionStringBuilder CreateConnectionStringBuilder()
 115 //                 {
 116 //                         throw new NotImplementedException ();
 117 //                 }
 118
 119                 public override DbDataAdapter CreateDataAdapter()
 120                 {
 121                         return new OdbcDataAdapter () as DbDataAdapter;
 122                 }
 123
 124                 public override DbParameter CreateParameter()
 125                 {
 126                         return new OdbcParameter () as DbParameter;
 127                 }
 128
 129 //                 public override CodeAccessPermission CreatePermission(PermissionState state)
 130 //                 {
 131 //                         throw new NotImplementedException ();
 132 //                 }
 133
 134                 #endregion //Methods
 135
 136         }
 137
 138
 139 }
 140 #endif // NET_2_0