120 lines
4.0 KiB
C#
120 lines
4.0 KiB
C#
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//
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// System.Data.Odbc.OdbcFactory
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//
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// Author:
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// Sureshkumar T <tsureshkumar@novell.com>
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//
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//
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// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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#if NET_2_0
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#region Using Directives
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using System;
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using System.Data;
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using System.Data.Common;
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using System.Security;
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using System.Security.Permissions;
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#endregion // Using Directives
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namespace System.Data.Odbc
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{
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public sealed class OdbcFactory : DbProviderFactory
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{
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#region Fields
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public static readonly OdbcFactory Instance;
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static readonly object lockStatic = new object ();
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#endregion //Fields
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#region Constructors
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/// <remarks>
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/// public static variable Instance should hold the the singleton instance
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/// based on the knowledge that custom factories without this instance variable
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/// ms.net throws exception
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/// <pre>
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/// System.InvalidOperationException: The requested .Net Framework Data
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/// Provider's implementation does not have an Instance field
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/// of a System.Data.Common.DbProviderFactory derived type.
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/// at System.Data.Common.DbProviderFactories.GetFactory(DataRow providerRow)
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/// at System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName)
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/// </pre>
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/// </remarks>
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static OdbcFactory()
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{
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lock (lockStatic)
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{
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if (Instance == null)
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Instance = new OdbcFactory ();
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}
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}
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private OdbcFactory()
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{
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}
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#endregion //Constructors
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#region Methods
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public override DbConnection CreateConnection()
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{
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return new OdbcConnection () as DbConnection;
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}
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public override DbCommand CreateCommand()
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{
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return new OdbcCommand () as DbCommand;
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}
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public override DbCommandBuilder CreateCommandBuilder()
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{
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return new OdbcCommandBuilder () as DbCommandBuilder;
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}
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public override DbConnectionStringBuilder CreateConnectionStringBuilder ()
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{
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return new OdbcConnectionStringBuilder () as DbConnectionStringBuilder;
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}
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public override DbDataAdapter CreateDataAdapter()
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{
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return new OdbcDataAdapter () as DbDataAdapter;
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}
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public override DbParameter CreateParameter()
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{
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return new OdbcParameter () as DbParameter;
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}
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public override CodeAccessPermission CreatePermission (PermissionState state)
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{
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return new OdbcPermission (state);
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}
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#endregion //Methods
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}
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}
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#endif // NET_2_0
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