/sqlite3cc

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/*
 * exception.h
 *
 * Copyright (C) 2009 Tim Marston <edam@waxworlds.org>
 *
 * This file is part of sqlite3cc (hereafter referred to as "this program").
 * See http://www.waxworlds.org/edam/software/sqlite3cc for more information.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef SQLITE3CC_EXCEPTION_H_
#define SQLITE3CC_EXCEPTION_H_


#include <sqlite3.h>
#include <stdexcept>


namespace sqlite
{


/**
 * Main (base) sqlite exception class.
 */
class sqlite_error
	:
	public std::exception
{
//______________________________________________________________________________
//                                                                 instantiation
public:

	/**
	 * Constructor that takes an sqlite error code and determines it's own
	 * error message
	 * @param error_code the sqlite error code
	 */
	explicit sqlite_error(
		int error_code );

	/**
	 * Constructor that allows the creation of an sqlite error with a custom
	 * message.
	 * @param message a customer error message string
	 * @param error_code the sqlite error code
	 */
	explicit sqlite_error(
		const std::string &message,
		int error_code = SQLITE_ERROR );

	virtual ~sqlite_error() throw( );

//______________________________________________________________________________
//                                                              public interface
public:

	/**
	 * Get the sqlite error code associated with this error
	 * @returns the sqlite error code
	 */
	int get_error_code() const;

	/**
	 * Get the error message
	 * @returns the error message
	 */
	virtual const char* what() const throw( );

//______________________________________________________________________________
//                                                                implementation
private:

	/**
	 * Retrieve an automatic error message for a given sqlite error code
	 * @param the sqlite error code
	 * @returns the automatic string
	 */
	const std::string &get_error_message(
		int error_code );

	/** the error code */
	int _error_code;

	/** the message string */
	std::string _message;

};


/**
 * An sqlite error that indicates the database was busy
 */
class sqlite_busy
	:
	public sqlite_error
{
public:
	sqlite_busy()
		:
		sqlite_error( "database was busy", SQLITE_BUSY )
	{ }
};


} // namespace sqlite


#endif /* SQLITE3CC_EXCEPTION_H_ */