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#if MYSQL_6_10
// Copyright © 2004, 2018, Oracle and/or its affiliates. All rights reserved.
//
// 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
using System;
using System.Collections.Generic;
using System.Data;
using Externals.MySql.Data.MySqlClient;
#if NETSTANDARD1_3
namespace Externals.MySql.Data.MySqlClient.Interceptors
#else
namespace Externals.MySql.Data.MySqlClient
#endif
{
/// <summary>
/// BaseCommandInterceptor is the base class that should be used for all userland
/// command interceptors
/// </summary>
internal abstract class BaseCommandInterceptor
{
/// <summary>
/// Gets the active connection.
/// </summary>
protected MySqlConnection ActiveConnection { get; private set; }
/// <summary>
/// Executes an SQL statements that returns a scalar value such as a calculation.
/// </summary>
/// <param name="sql">The SQL statement to execute.</param>
/// <param name="returnValue">A scalar value that represents the result returned by the execution of the SQL statement.</param>
/// <returns><c>false</c>.</returns>
/// <remarks>This method is intended to be overriden.</remarks>
public virtual bool ExecuteScalar(string sql, ref object returnValue)
{
return false;
}
/// <summary>
/// Executes an SQL statement that returns the number of affected rows.
/// </summary>
/// <param name="sql">The SQL statement to execute.</param>
/// <param name="returnValue">The number of affected rows.</param>
/// <returns><c>false</c>.</returns>
/// <remarks>This method is intended to be overriden.</remarks>
public virtual bool ExecuteNonQuery(string sql, ref int returnValue)
{
return false;
}
/// <summary>
/// Executes an SQL statement that will return a resultset.
/// </summary>
/// <param name="sql">The SQL statement to execute.</param>
/// <param name="behavior">A value that describes the results of the query and its effect on the database.</param>
/// <param name="returnValue">A <see cref="MySqlDataReader"/> object containing the result of the statement execution.</param>
/// <returns><c>false</c>.</returns>
/// <remarks>This method is intended to be overriden.</remarks>
public virtual bool ExecuteReader(string sql, CommandBehavior behavior, ref MySqlDataReader returnValue)
{
return false;
}
/// <summary>
/// Sets the active connection.
/// </summary>
/// <param name="connection">The active connection.</param>
public virtual void Init(MySqlConnection connection)
{
ActiveConnection = connection;
}
}
/// <summary>
/// CommandInterceptor is the "manager" class that keeps the list of registered interceptors
/// for the given connection.
/// </summary>
internal sealed partial class CommandInterceptor : Interceptor
{
bool _insideInterceptor = false;
readonly List<BaseCommandInterceptor> _interceptors = new List<BaseCommandInterceptor>();
public CommandInterceptor(MySqlConnection connection)
{
Connection = connection;
LoadInterceptors(connection.Settings.CommandInterceptors);
}
public bool ExecuteScalar(string sql, ref object returnValue)
{
if (_insideInterceptor) return false;
_insideInterceptor = true;
bool handled = false;
foreach (BaseCommandInterceptor bci in _interceptors)
handled |= bci.ExecuteScalar(sql, ref returnValue);
_insideInterceptor = false;
return handled;
}
public bool ExecuteNonQuery(string sql, ref int returnValue)
{
if (_insideInterceptor) return false;
_insideInterceptor = true;
bool handled = false;
foreach (BaseCommandInterceptor bci in _interceptors)
handled |= bci.ExecuteNonQuery(sql, ref returnValue);
_insideInterceptor = false;
return handled;
}
public bool ExecuteReader(string sql, CommandBehavior behavior, ref MySqlDataReader returnValue)
{
if (_insideInterceptor) return false;
_insideInterceptor = true;
bool handled = false;
foreach (BaseCommandInterceptor bci in _interceptors)
handled |= bci.ExecuteReader(sql, behavior, ref returnValue);
_insideInterceptor = false;
return handled;
}
protected override void AddInterceptor(object o)
{
if (o == null)
throw new ArgumentException("Unable to instantiate CommandInterceptor");
if (!(o is BaseCommandInterceptor))
throw new InvalidOperationException(String.Format(Resources.TypeIsNotCommandInterceptor,
o.GetType()));
BaseCommandInterceptor ie = (BaseCommandInterceptor)o;
ie.Init(Connection);
_interceptors.Insert(0, (BaseCommandInterceptor)o);
}
protected override string ResolveType(string nameOrType)
{
#if NETSTANDARD1_3
return base.ResolveType(nameOrType);
#else
if (MySqlConfiguration.Settings == null || MySqlConfiguration.Settings.CommandInterceptors == null)
return base.ResolveType(nameOrType);
foreach (InterceptorConfigurationElement e in MySqlConfiguration.Settings.CommandInterceptors)
if (String.Compare(e.Name, nameOrType, true) == 0)
return e.Type;
return base.ResolveType(nameOrType);
#endif
}
}
}
#endif