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/* Copyright © 2005-2006 Roger Leigh <rleigh@debian.org>
*
* schroot 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; either version 2 of the License, or
* (at your option) any later version.
*
* schroot 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*********************************************************************/
#ifndef SBUILD_CUSTOM_ERROR_H
#define SBUILD_CUSTOM_ERROR_H
#include <sbuild/sbuild-error.h>
#include <map>
#include <string>
namespace sbuild
{
/**
* Custom error.
*/
template <typename T>
class custom_error : public runtime_error
{
public:
typedef T error_type;
typedef std::map<error_type,const char *> map_type;
/**
* Null class to represent an absence of context or detail in an
* error.
*/
class null
{
/**
* null output to an ostream.
* @todo Output placeholder text.
*/
template <class charT, class traits>
friend
std::basic_ostream<charT,traits>&
operator << (std::basic_ostream<charT,traits>& stream,
null const& n)
{
return stream;
}
};
/**
* The constructor.
*
* @param error the error code.
*/
custom_error (error_type error):
runtime_error(format_error(null(), null(), error, null(), null()))
{
}
/**
* The constructor.
*
* @param detail the details of the error.
* @param error the error code.
*/
custom_error (std::string const& detail,
error_type error):
runtime_error(format_error(detail, null(), error, null(), null()))
{
}
/**
* The constructor.
*
* @param error the error code.
* @param error_string the error string.
*/
custom_error (error_type error,
std::string const& error_string):
runtime_error(format_error(null(), null(), error, error_string, null()))
{
}
/**
* The constructor.
*
* @param detail the details of the error.
* @param error the error code.
* @param error_string the error string.
*/
custom_error (std::string const& detail,
error_type error,
std::string const& error_string):
runtime_error(format_error(detail, null(), error, error_string, null()))
{
}
/**
* The constructor.
*
* @param detail the details of the error.
* @param error the error code.
*/
custom_error (std::runtime_error const& error):
runtime_error(format_error(null(), null(), error, null(), null()))
{
}
/**
* The constructor.
*
* @param detail the details of the error.
* @param error the error code.
*/
custom_error (std::string const& detail,
std::runtime_error const& error):
runtime_error(format_error(detail, null(), error, null(), null()))
{
}
/// The destructor.
virtual ~custom_error () throw ()
{}
private:
/// Mapping between error code and string.
static map_type error_strings;
/**
* Get a translated error string.
*
* @param error the error code.
* @returns a translated error string.
*/
static const char *
get_error (error_type error);
/**
* Format an error message.
*
* @param context1 context of the error.
* @param context2 additional context of the error.
* @param error the error code.
* @param detail1 details of the error.
* @param detail2 additional details of the error.
* @returns a translated error message.
*/
template <typename A, typename B, typename C, typename D>
std::string
format_error (A const& context1,
B const& context2,
error_type error,
C const& detail1,
D const& detail2);
/**
* Format an error message.
*
* @param context1 context of the error.
* @param context2 additional context of the error.
* @param error the error code.
* @param detail1 details of the error.
* @param detail2 additional details of the error.
* @returns a translated error message.
*/
template <typename A, typename B, typename C, typename D>
std::string
format_error (A const& context1,
B const& context2,
std::runtime_error const& error,
C const& detail1,
D const& detail2);
};
}
#include "sbuild-custom-error.tcc"
#endif /* SBUILD_CUSTOM_ERROR_H */
/*
* Local Variables:
* mode:C++
* End:
*/
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