2 // System.Data.Odbc.OdbcFactory
5 // Sureshkumar T <tsureshkumar@novell.com>
8 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
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:
18 // The above copyright notice and this permission notice shall be
19 // included in all copies or substantial portions of the Software.
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
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31 #region Using Directives
34 using System.Data.Common;
35 using System.Security;
36 using System.Security.Permissions;
37 #endregion // Using Directives
39 namespace System.Data.Odbc
42 public sealed class OdbcFactory : DbProviderFactory
45 public static readonly OdbcFactory Instance;
46 static readonly object lockStatic = new object ();
51 /// public static variable Instance should hold the the singleton instance
52 /// based on the knowledge that custom factories without this instance variable
53 /// ms.net throws exception
55 /// System.InvalidOperationException: The requested .Net Framework Data
56 /// Provider's implementation does not have an Instance field
57 /// of a System.Data.Common.DbProviderFactory derived type.
58 /// at System.Data.Common.DbProviderFactories.GetFactory(DataRow providerRow)
59 /// at System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName)
67 Instance = new OdbcFactory ();
76 #endregion //Constructors
79 public override DbConnection CreateConnection()
81 return new OdbcConnection () as DbConnection;
84 public override DbCommand CreateCommand()
86 return new OdbcCommand () as DbCommand;
89 public override DbCommandBuilder CreateCommandBuilder()
91 return new OdbcCommandBuilder () as DbCommandBuilder;
95 public override DbConnectionStringBuilder CreateConnectionStringBuilder ()
97 return new OdbcConnectionStringBuilder () as DbConnectionStringBuilder;
100 public override DbDataAdapter CreateDataAdapter()
102 return new OdbcDataAdapter () as DbDataAdapter;
105 public override DbParameter CreateParameter()
107 return new OdbcParameter () as DbParameter;
110 public override CodeAccessPermission CreatePermission (PermissionState state)
112 return new OdbcPermission (state);