ErrorHandler.h

/*
 *  $Id$
 *  ErrorHandler and ErrorBase class interface
 *
 *  This file is part of OTAWA
 *  Copyright (c) 2009, IRIT UPS.
 *
 *  OTAWA 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.
 *
 *  OTAWA 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 OTAWA; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef ELM_UTIL_ERRORHANDLER_H_
#define ELM_UTIL_ERRORHANDLER_H_
 
#include <elm/assert.h>
#include <elm/string.h>
 
namespace elm {
 
// error level type
typedef enum error_level_t {
    level_none = 0,
    level_info,
    level_warning,
    level_error,
    level_fatal
} error_level_t;
 
// ErrorHandler class
class ErrorHandler {
public:
    virtual void onError(error_level_t level, const string& message);
    static cstring getLevelString(error_level_t level);
    static ErrorHandler DEFAULT, &NO_INFO, &QUIET;
    virtual ~ErrorHandler() {};
};
 
// ErrorBase class
class ErrorBase {
public:
    inline ErrorBase(ErrorHandler *error_handler = &ErrorHandler::DEFAULT)
        { setErrorHandler(error_handler); }
    inline void setErrorHandler(ErrorHandler *error_handler)
        { ASSERTP(error_handler, "null error handler"); handler = error_handler; }
    inline ErrorHandler *getErrorHandler(void) const { return handler; }
 
protected:
    inline void onError(error_level_t level, const string& message) { handler->onError(level, message); }
 
private:
    ErrorHandler *handler;
};
 
}   // elm
 
#endif /* ELM_UTIL_ERRORHANDLER_H_ */