libt2n: (gerd) basic command handling (still some todos)

[libt2n] / src / t2n_exception.hxx

/***************************************************************************
 *   Copyright (C) 2006 by Gerd v. Egidy                                   *
 *   gve@intra2net.com                                                     *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU Lesser General Public License version   *
 *   2.1 as published by the Free Software Foundation.                     *
 *                                                                         *
 *   This library 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 Lesser General Public License for more details.                   *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this program; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/
#ifndef __LIBT2N_T2N_EXCEPTION
#define __LIBT2N_T2N_EXCEPTION

#include <stdexcept>
#include <string>

#include <boost/serialization/serialization.hpp>
#include <boost/serialization/export.hpp>

namespace boost {
namespace serialization {

// make std::exception serializable
template<class Archive>
void serialize(Archive & ar, std::exception & g, const unsigned int version)
{
}

} // namespace serialization
} // namespace boost

namespace libt2n
{
/// a generic exception that can be handeled with libt2n
class t2n_exception : public std::exception
{
    private:
        std::string message;

        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(exception);
            ar & BOOST_SERIALIZATION_NVP(message);
        }

    public:
        t2n_exception(const std::string& _message)
            { message=_message; }

        t2n_exception()
            { }

        virtual const char* what() const throw()
            { return message.c_str(); }

        virtual t2n_exception* clone() const
            { return new t2n_exception(*this); }

        virtual ~t2n_exception() throw()
            {}

        virtual void do_throw()
            { throw *this; }
};

/// a (unspecified) problem with libt2n communication
class t2n_communication_error : public t2n_exception
{
    private:
        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(t2n_exception);
        }

    public:
        t2n_communication_error(const std::string& _message)
            : t2n_exception(_message)
            { }

        t2n_communication_error()
            { }

        t2n_exception* clone() const
            { return new t2n_communication_error(*this); }

        void do_throw()
            { throw *this; }
};

/// can't connect to libt2n server
class t2n_connect_error : public t2n_communication_error
{
    private:
        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(t2n_communication_error);
        }

    public:
        t2n_connect_error(const std::string& _message)
            : t2n_communication_error(_message)
            { }

        t2n_connect_error()
            { }

        t2n_exception* clone() const
            { return new t2n_connect_error(*this); }

        void do_throw()
            { throw *this; }
};

/// error establishing a socket on the server (only thrown on the server-side)
class t2n_server_error : public t2n_communication_error
{
    private:
        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(t2n_communication_error);
        }

    public:
        t2n_server_error(const std::string& _message)
            : t2n_communication_error(_message)
            { }

        t2n_server_error()
            { }

        t2n_exception* clone() const
            { return new t2n_server_error(*this); }

        void do_throw()
            { throw *this; }
};

/// error transmitting or receiving libt2n messages
class t2n_transfer_error : public t2n_communication_error
{
    private:
        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(t2n_communication_error);
        }

    public:
        t2n_transfer_error(const std::string& _message)
            : t2n_communication_error(_message)
            { }

        t2n_transfer_error()
            { }

        t2n_exception* clone() const
            { return new t2n_transfer_error(*this); }

        void do_throw()
            { throw *this; }
};

/// tried to talk to an incompatible libt2n version
class t2n_version_mismatch : public t2n_communication_error
{
    private:
        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(t2n_communication_error);
        }

    public:
        t2n_version_mismatch(const std::string& _message)
            : t2n_communication_error(_message)
            { }

        t2n_version_mismatch()
            { }

        t2n_exception* clone() const
            { return new t2n_version_mismatch(*this); }

        void do_throw()
            { throw *this; }
};

/// illegal libt2n command received
class t2n_command_error : public t2n_exception
{
    private:
        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(t2n_exception);
        }

    public:
        t2n_command_error(const std::string& _message)
            : t2n_exception(_message)
            { }

        t2n_command_error()
            { }

        t2n_exception* clone() const
            { return new t2n_command_error(*this); }

        void do_throw()
            { throw *this; }
};

/// error serializing or deserializing a libt2n command packet
class t2n_serialization_error : public t2n_exception
{
    private:
        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(t2n_exception);
        }

    public:
        t2n_serialization_error(const std::string& _message)
            : t2n_exception(_message)
            { }

        t2n_serialization_error()
            { }

        t2n_exception* clone() const
            { return new t2n_serialization_error(*this); }

        void do_throw()
            { throw *this; }
};

/** @brief a runtime error within the remote function.
 derive your own custom exceptions from this one
*/
class t2n_runtime_error : public t2n_exception
{
    private:
        friend class boost::serialization::access;
        template<class Archive>
        void serialize(Archive & ar, const unsigned int version)
        {
            ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(t2n_exception);
        }

    public:
        t2n_runtime_error(const std::string& _message)
            : t2n_exception(_message)
            { }

        t2n_runtime_error()
            { }

        t2n_exception* clone() const
            { return new t2n_runtime_error(*this); }

        void do_throw()
            { throw *this; }
};

}  // namespace libt2n

#endif