assimp/include/DefaultLogger.h

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/*
Open Asset Import Library (ASSIMP)
----------------------------------------------------------------------
Copyright (c) 2006-2008, ASSIMP Development Team
All rights reserved.
Redistribution and use of this software in source and binary forms,
with or without modification, are permitted provided that the
following conditions are met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other
materials provided with the distribution.
* Neither the name of the ASSIMP team, nor the names of its
contributors may be used to endorse or promote products
derived from this software without specific prior
written permission of the ASSIMP Development Team.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
----------------------------------------------------------------------
*/
#if (!defined AI_DEFAULTLOGGER_H_INCLUDED)
#define AI_DEFAULTLOGGER_H_INCLUDED
#include "../include/Logger.h"
#include <vector>
namespace Assimp
{
// ---------------------------------------------------------------------------
class IOStream;
struct LogStreamInfo;
// ---------------------------------------------------------------------------
/** @class NullLogger
* @brief Empty logging implementation. Does nothing. Used by default
* if the application hasn't specified a custom logger (or DefaultLogger)
* via DefaultLogger::set() or DefaultLogger::create();
*/
class NullLogger : public Logger
{
public:
/** @brief Logs a debug message */
void debug(const std::string &message) {}
/** @brief Logs an info message */
void info(const std::string &message) {}
/** @brief Logs a warning message */
void warn(const std::string &message) {}
/** @brief Logs an error message */
void error(const std::string &message) {}
/** @brief Log severity setter */
void setLogSeverity(LogSeverity log_severity) {}
/** @brief Detach a still attached stream from logger */
void attachStream(LogStream *pStream, unsigned int severity) {}
/** @brief Detach a still attached stream from logger */
void detatchStream(LogStream *pStream, unsigned int severity) {}
};
// ---------------------------------------------------------------------------
/** @class DefaultLogger
* @brief Default logging implementation. The logger writes into a file.
* The name can be set by creating the logger. If no filename was specified
* the logger will use the standard out and error streams.
*/
class DefaultLogger :
public Logger
{
public:
/** @brief Creates a custom logging instance (DefaultLogger)
* @param name Name for logfile
* @param severity Log severity, VERBOSE will activate debug messages
*
* This replaces the default NullLogger with a DefaultLogger instance.
*/
static Logger *create(const std::string &name, LogSeverity severity);
/** @brief Setup a custom implementation of the Logger interface as
* default logger.
*
* Use this if the provided DefaultLogger class doesn't fit into
* your needs. If the provided message formatting is OK for you,
* it is easier to use create() to create a DefaultLogger and to attach
* your own custom output streams to it than using this method.
* @param logger Pass NULL to setup a default NullLogger
*/
static void set (Logger *logger);
/** @brief Getter for singleton instance
* @return Only instance. This is never null, but it could be a
* NullLogger. Use isNullLogger to check this.
*/
static Logger *get();
/** @brief Return whether a default NullLogger is currently active
* @return true if the current logger id a NullLogger.
* Use create() or set() to setup a custom logger.
*/
static bool isNullLogger();
/** @brief Will kill the singleton instance and setup a NullLogger as
logger */
static void kill();
/** @brief Logs debug infos, only been written when severity level VERBOSE is set */
void debug(const std::string &message);
/** @brief Logs an info message */
void info(const std::string &message);
/** @brief Logs a warning message */
void warn(const std::string &message);
/** @brief Logs an error message */
void error(const std::string &message);
/** @drief Severity setter */
void setLogSeverity(LogSeverity log_severity);
/** @brief Detach a still attached stream from logger */
void attachStream(LogStream *pStream, unsigned int severity);
/** @brief Detach a still attached stream from logger */
void detatchStream(LogStream *pStream, unsigned int severity);
private:
/** @brief Constructor
* @param name Name for logfile, keep this empty to use std::cout and std::cerr
* @param severity Severity of logger
*/
DefaultLogger(const std::string &name, LogSeverity severity);
/** @brief Destructor */
~DefaultLogger();
/** @brief Writes message into a file */
void writeToStreams(const std::string &message, ErrorSeverity ErrorSev );
private:
// Aliases for stream container
typedef std::vector<LogStreamInfo*> StreamArray;
typedef std::vector<LogStreamInfo*>::iterator StreamIt;
typedef std::vector<LogStreamInfo*>::const_iterator ConstStreamIt;
//! only logging instance
static Logger *m_pLogger;
static NullLogger s_pNullLogger;
//! Logger severity
LogSeverity m_Severity;
//! Attached streams
StreamArray m_StreamArray;
//! Array with default streams
std::vector<LogStream*> m_Streams;
};
// ---------------------------------------------------------------------------
} // Namespace Assimp
#endif // !! AI_DEFAULTLOGGER_H_INCLUDED