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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.Linq;
using Externals.MySql.Data.MySqlClient;
namespace Externals.MySql.Data.MySqlClient.Interceptors
{
/// <summary>
/// BaseExceptionInterceptor is the base class that should be used for all userland
/// exception interceptors.
/// </summary>
internal abstract class BaseExceptionInterceptor
{
/// <summary>
/// Returns the received exception.
/// </summary>
/// <param name="exception">The exception to be returned.</param>
/// <returns>The exception originally received.</returns>
public abstract Exception InterceptException(Exception exception);
/// <summary>
/// Gets the active connection.
/// </summary>
protected MySqlConnection ActiveConnection { get; private set; }
/// <summary>
/// Initilizes this object by setting the active connection.
/// </summary>
/// <param name="connection">The connection to become active.</param>
public virtual void Init(MySqlConnection connection)
{
ActiveConnection = connection;
}
}
/// <summary>
/// StandardExceptionInterceptor is the standard interceptor that simply returns the exception.
/// It is the default action.
/// </summary>
internal sealed class StandardExceptionInterceptor : BaseExceptionInterceptor
{
/// <summary>
/// Returns the received exception, which is the default action
/// </summary>
/// <param name="exception">The exception to be returned.</param>
/// <returns>The exception originally received.</returns>
public override Exception InterceptException(Exception exception)
{
return exception;
}
}
/// <summary>
/// ExceptionInterceptor is the "manager" class that keeps the list of registered interceptors
/// for the given connection.
/// </summary>
internal sealed class ExceptionInterceptor : Interceptor
{
readonly List<BaseExceptionInterceptor> _interceptors = new List<BaseExceptionInterceptor>();
public ExceptionInterceptor(MySqlConnection connection)
{
Connection = connection;
LoadInterceptors(connection.Settings.ExceptionInterceptors);
// we always have the standard interceptor
_interceptors.Add(new StandardExceptionInterceptor());
}
protected override void AddInterceptor(object o)
{
if (o == null)
throw new ArgumentException("Unable to instantiate ExceptionInterceptor");
if (!(o is BaseExceptionInterceptor))
throw new InvalidOperationException(String.Format(Resources.TypeIsNotExceptionInterceptor,
o.GetType()));
BaseExceptionInterceptor ie = o as BaseExceptionInterceptor;
ie.Init(Connection);
_interceptors.Insert(0, (BaseExceptionInterceptor)o);
}
public void Throw(Exception exception)
{
Exception e = _interceptors.Aggregate(exception, (current, ie) => ie.InterceptException(current));
throw e;
}
#if !NETSTANDARD1_3
protected override string ResolveType(string nameOrType)
{
if (MySqlConfiguration.Settings == null || MySqlConfiguration.Settings.ExceptionInterceptors == null)
return base.ResolveType(nameOrType);
foreach (InterceptorConfigurationElement e in MySqlConfiguration.Settings.ExceptionInterceptors)
if (String.Compare(e.Name, nameOrType, true) == 0)
return e.Type;
return base.ResolveType(nameOrType);
}
#endif
}
}
#endif