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156 lines
6.1 KiB
156 lines
6.1 KiB
#if MYSQL_6_10
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// Copyright ?2004, 2018, Oracle and/or its affiliates. All rights reserved.
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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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using System;
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using System.Data.Common;
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using System.Reflection;
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#if !NETSTANDARD1_3
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using System.Security.Permissions;
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#endif
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namespace Externals.MySql.Data.MySqlClient
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{
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/// <summary>
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/// Represents a set of methods for creating instances of the MySQL client implementation of the data source classes.
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/// </summary>
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#if !NETSTANDARD1_3
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[ReflectionPermission(SecurityAction.Assert, MemberAccess = true)]
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#endif
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internal sealed partial 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="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="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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#if !NETSTANDARD1_3
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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="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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#endif
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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 => _dbServicesType ?? (_dbServicesType = Type.GetType(
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@"System.Data.Common.DbProviderServices, System.Data.Entity,
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Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089",
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false));
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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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#if NETSTANDARD1_3
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string fullName = typeof(MySqlClientFactory).GetTypeInfo().Assembly.FullName;
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#else
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string fullName = Assembly.GetExecutingAssembly().FullName;
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#endif
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string assemblyName = fullName.Replace("Externals.MySql.Data", "Externals.MySql.Data.Entity.EF6");
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string assemblyEf5Name = fullName.Replace("Externals.MySql.Data", "Externals.MySql.Data.Entity.EF5");
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fullName = $"Externals.MySql.Data.MySqlClient.MySqlProviderServices, {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 = $"Externals.MySql.Data.MySqlClient.MySqlProviderServices, {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", 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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return serviceType != DbServicesType ? null : 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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