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#if MYSQL_6_9
// Copyright © 2004, 2011, 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.Text;
using System.Reflection;
using Externals.MySql.Data.MySqlClient.Properties;
using System.Data.Common;
using System.Data;
namespace Externals.MySql.Data.MySqlClient
{
/// <summary>
/// BaseCommandInterceptor is the base class that should be used for all userland
/// command interceptors
/// </summary>
internal abstract class BaseCommandInterceptor
{
protected MySqlConnection ActiveConnection { get; private set; }
public virtual bool ExecuteScalar(string sql, ref object returnValue)
{
return false;
}
public virtual bool ExecuteNonQuery(string sql, ref int returnValue)
{
return false;
}
public virtual bool ExecuteReader(string sql, CommandBehavior behavior, ref MySqlDataReader returnValue)
{
return false;
}
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 class CommandInterceptor : Interceptor
{
bool insideInterceptor = false;
List<BaseCommandInterceptor> interceptors = new List<BaseCommandInterceptor>();
public CommandInterceptor(MySqlConnection connection)
{
this.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(String.Format("Unable to instantiate CommandInterceptor"));
if (!(o is BaseCommandInterceptor))
throw new InvalidOperationException(String.Format(Resources.TypeIsNotCommandInterceptor, o.GetType()));
BaseCommandInterceptor ie = o as BaseCommandInterceptor;
ie.Init(connection);
interceptors.Insert(0, (BaseCommandInterceptor)o);
}
protected override string ResolveType(string nameOrType)
{
if (MySqlConfiguration.Settings != null && MySqlConfiguration.Settings.CommandInterceptors != null)
{
foreach (InterceptorConfigurationElement e in MySqlConfiguration.Settings.CommandInterceptors)
if (String.Compare(e.Name, nameOrType, true) == 0)
return e.Type;
}
return base.ResolveType(nameOrType);
}
}
}
#endif