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