You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

172 lines
6.0 KiB

// Copyright (c) 2004-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
//
// MySQL Connector/NET is licensed under the terms of the GPLv2
// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
// MySQL Connectors. There are special exceptions to the terms and
// conditions of the GPLv2 as it is applied to this software, see the
// FLOSS License Exception
// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published
// by the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#if MYSQL_6_9
using System.Data.Common;
using System;
using System.Reflection;
using System.Security.Permissions;
using System.Security;
namespace Externals.MySql.Data.MySqlClient
{
/// <summary>
/// DBProviderFactory implementation for MysqlClient.
/// </summary>
[ReflectionPermission(SecurityAction.Assert, MemberAccess = true)]
internal sealed class MySqlClientFactory : DbProviderFactory, IServiceProvider
{
/// <summary>
/// Gets an instance of the <see cref="MySqlClientFactory"/>.
/// This can be used to retrieve strongly typed data objects.
/// </summary>
public static MySqlClientFactory Instance = new MySqlClientFactory();
private Type dbServicesType;
private FieldInfo mySqlDbProviderServicesInstance;
/// <summary>
/// Returns a strongly typed <see cref="DbCommandBuilder"/> instance.
/// </summary>
/// <returns>A new strongly typed instance of <b>DbCommandBuilder</b>.</returns>
public override DbCommandBuilder CreateCommandBuilder()
{
return new MySqlCommandBuilder();
}
/// <summary>
/// Returns a strongly typed <see cref="DbCommand"/> instance.
/// </summary>
/// <returns>A new strongly typed instance of <b>DbCommand</b>.</returns>
public override DbCommand CreateCommand()
{
return new MySqlCommand();
}
/// <summary>
/// Returns a strongly typed <see cref="DbConnection"/> instance.
/// </summary>
/// <returns>A new strongly typed instance of <b>DbConnection</b>.</returns>
public override DbConnection CreateConnection()
{
return new MySqlConnection();
}
/// <summary>
/// Returns a strongly typed <see cref="DbDataAdapter"/> instance.
/// </summary>
/// <returns>A new strongly typed instance of <b>DbDataAdapter</b>. </returns>
public override DbDataAdapter CreateDataAdapter()
{
return new MySqlDataAdapter();
}
/// <summary>
/// Returns a strongly typed <see cref="DbParameter"/> instance.
/// </summary>
/// <returns>A new strongly typed instance of <b>DbParameter</b>.</returns>
public override DbParameter CreateParameter()
{
return new MySqlParameter();
}
/// <summary>
/// Returns a strongly typed <see cref="DbConnectionStringBuilder"/> instance.
/// </summary>
/// <returns>A new strongly typed instance of <b>DbConnectionStringBuilder</b>.</returns>
public override DbConnectionStringBuilder CreateConnectionStringBuilder()
{
return new MySqlConnectionStringBuilder();
}
/// <summary>
/// Returns true if a <b>MySqlDataSourceEnumerator</b> can be created;
/// otherwise false.
/// </summary>
public override bool CanCreateDataSourceEnumerator
{
get { return false; }
}
#region IServiceProvider Members
/// <summary>
/// Provide a simple caching layer
/// </summary>
private Type DbServicesType
{
get
{
if (dbServicesType == null)
{
// Get the type this way so we don't have to reference System.Data.Entity
// from our core provider
dbServicesType = Type.GetType(
@"System.Data.Common.DbProviderServices, System.Data.Entity,
Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089",
false);
}
return dbServicesType;
}
}
private FieldInfo MySqlDbProviderServicesInstance
{
get
{
if (mySqlDbProviderServicesInstance == null)
{
string fullName = Assembly.GetExecutingAssembly().FullName;
string assemblyName = fullName.Replace("Externals.MySql.Data", "Externals.MySql.Data.Entity");
string assemblyEf5Name = fullName.Replace("Externals.MySql.Data", "Externals.MySql.Data.Entity.EF5");
fullName = String.Format("Externals.MySql.Data.MySqlClient.MySqlProviderServices, {0}", assemblyEf5Name);
Type providerServicesType = Type.GetType(fullName, false);
if (providerServicesType == null)
{
fullName = String.Format("Externals.MySql.Data.MySqlClient.MySqlProviderServices, {0}", assemblyName);
providerServicesType = Type.GetType(fullName, false);
if (providerServicesType == null)
throw new DllNotFoundException(fullName);
}
mySqlDbProviderServicesInstance = providerServicesType.GetField("Instance",
BindingFlags.NonPublic | BindingFlags.Static | BindingFlags.Instance);
}
return mySqlDbProviderServicesInstance;
}
}
object IServiceProvider.GetService(Type serviceType)
{
// DbProviderServices is the only service we offer up right now
if (serviceType != DbServicesType) return null;
if (MySqlDbProviderServicesInstance == null) return null;
return MySqlDbProviderServicesInstance.GetValue(null);
}
#endregion
}
}
#endif