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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32 #region Using Directives
35 using System.Data.Common;
36 using System.Security;
37 using System.Security.Permissions;
38 #endregion // Using Directives
40 namespace System.Data.Odbc
43 public sealed class OdbcFactory : DbProviderFactory
46 public static readonly OdbcFactory Instance;
47 static readonly object lockStatic = new object ();
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
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)
68 Instance = new OdbcFactory ();
77 #endregion //Constructors
80 public override DbConnection CreateConnection()
82 return new OdbcConnection () as DbConnection;
85 public override DbCommand CreateCommand()
87 return new OdbcCommand () as DbCommand;
90 public override DbCommandBuilder CreateCommandBuilder()
92 return new OdbcCommandBuilder () as DbCommandBuilder;
96 public override DbConnectionStringBuilder CreateConnectionStringBuilder ()
98 return new OdbcConnectionStringBuilder () as DbConnectionStringBuilder;
101 public override DbDataAdapter CreateDataAdapter()
103 return new OdbcDataAdapter () as DbDataAdapter;
106 public override DbParameter CreateParameter()
108 return new OdbcParameter () as DbParameter;
111 public override CodeAccessPermission CreatePermission (PermissionState state)
113 return new OdbcPermission (state);