Bridge_Logger.cpp

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#include <exception>
#include <memory>
#include <string>
#include <sstream>
#include <cstdarg>
 
#include "Bridge_Logger.h"
#include "Bridge_ConsoleLogger.h"
#include "Bridge_FileLogger.h"
#include "Bridge_NullLogger.h"
 
 
namespace DesignPatternExamples_cpp
{
 
    // Constructor
    Logger::Logger(LoggerTypes loggerType)
        : _logger(nullptr)
    {
 
        switch (loggerType)
        {
            case LoggerTypes::ToNull:
                _logger = NullLogger::CreateLogger();
                break;
 
            case LoggerTypes::ToConsole:
                _logger = ConsoleLogger::CreateLogger();
                break;
 
            case LoggerTypes::ToFile:
                throw std::runtime_error("A filename must be specified for the Logger.ToFile logger type.  Please use Logger::Logger(const std::string&) constructor instead.");
 
            default:
            {
                std::ostringstream msg;
                msg << "The logger type '" << loggerType << "' is not recognized.  Cannot construct a Logger.";
                throw std::runtime_error(msg.str().c_str());
            }
        }
    }
 
    // Constructor
    Logger::Logger(const std::string& filename)
    {
        _logger = FileLogger::CreateLogger(filename);
    }
 
 
    // LogTrace
    void Logger::LogTrace(std::string message)
    {
        if (_logger != nullptr)
        {
            _logger->LogTrace(message);
        }
    }
 
    // LogInfo
    void Logger::LogInfo(std::string message)
    {
        if (_logger != nullptr)
        {
            _logger->LogInfo(message);
        }
    }
 
    // LogError
    void Logger::LogError(std::string message)
    {
        if (_logger != nullptr)
        {
            _logger->LogError(message);
        }
    }
 
} // end namespace