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.
----------------------------------------------------------------------
*/
/** @file DefaultLogger.h
*/
#ifndef INCLUDED_AI_DEFAULTLOGGER
#define INCLUDED_AI_DEFAULTLOGGER
#include "Logger.h"
#include "LogStream.h"
#include "NullLogger.h"
#include <vector>
namespace Assimp {
// ------------------------------------------------------------------------------------
class IOStream;
struct LogStreamInfo;
// ------------------------------------------------------------------------------------
/** @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 ASSIMP_API DefaultLogger :
public Logger
{
public:
/** @brief Creates a default logging instance (DefaultLogger)
* @param name Name for log file. Only valid in combination
* with the DLS_FILE flag.
* @param severity Log severity, VERBOSE will activate debug messages
* @param defStreams Default log streams to be attached. Bitwise
* combination of the DefaultLogStreams enumerated
* values. If DLS_FILE is specified, but an empty
* string is passed for 'name' no log file is created.
* @param io IOSystem to be used to open external files (such as the
* log file). Pass NULL for the default implementation.
*
* This replaces the default NullLogger with a DefaultLogger instance.
*/
static Logger *create(const std::string &name = "AssimpLog.txt",
LogSeverity severity = NORMAL,
unsigned int defStreams = DLS_DEBUGGER | DLS_FILE,
IOSystem* io = NULL);
/** @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 is 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);
/** @brief Severity setter */
void setLogSeverity(LogSeverity log_severity);
/** @brief Attach a stream to the 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 Private construction for internal use by create().
* @param severity Logging granularity
*/
DefaultLogger(LogSeverity severity);
/** @brief Destructor */
~DefaultLogger();
/** @brief Writes a message to all streams */
void writeToStreams(const std::string &message, ErrorSeverity ErrorSev );
/** @brief Returns the thread id.
* @remark This is an OS specific feature, if not supported, a zero will be returned.
*/
std::string getThreadID();
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;
bool noRepeatMsg;
std::string lastMsg;
};
// ------------------------------------------------------------------------------------
} // Namespace Assimp
#endif // !! INCLUDED_AI_DEFAULTLOGGER