LogChannel.hpp

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#pragma ident "$Id: LogChannel.hpp 2942 2011-10-25 16:43:21Z yanweignss $"

#ifndef GPSTK_LOGCHANNEL_HPP
#define GPSTK_LOGCHANNEL_HPP

//============================================================================
//
//  This file is part of GPSTk, the GPS Toolkit.
//
//  The GPSTk 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 2.1 of the License, or
//  any later version.
//
//  The GPSTk 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 GPSTk; if not, write to the Free Software Foundation,
//  Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//  Wei Yan - Chinese Academy of Sciences . 2011
//
//============================================================================

#include <string>
#include <fstream>
#include "LogMessage.hpp"

namespace gpstk
{
 

   class LogChannel   
   {
   public:

      LogChannel(const std::string& fmt = "%t") 
         : ostrm(std::clog), pattern(fmt) {}      
      
      LogChannel(std::ostream& strm, const std::string& fmt="%t") 
         : ostrm(strm), pattern(fmt) {}      
      
      virtual ~LogChannel(){}

      std::string getLogText(const LogMessage& msg);

      virtual void log(const LogMessage& msg){}

      void setPattern(const std::string& fmt="%t")
      {
         pattern = fmt;
      }
      
   protected:
      std::ostream& ostrm;
      std::string pattern;

   };   // End of class 'LogChannel'

   class ConsoleLogChannel : public LogChannel   
   {
   public:

      ConsoleLogChannel(const std::string& fmt = "%t") 
         : LogChannel(fmt), ostrm(std::clog) {}      

      ConsoleLogChannel(std::ostream& strm, const std::string& fmt="%t") 
         : LogChannel(fmt), ostrm(strm) {}      

      virtual ~ConsoleLogChannel(){}

      virtual void log(const LogMessage& msg)
      {
         ostrm << getLogText(msg) << std::endl;
      }

      void setPattern(const std::string& fmt="%t")
      {
         pattern = fmt;
      }

   public:
      std::ostream& ostrm;
      std::string pattern;

   };   // End of class 'LogChannel'


   class FileLogChannel : public LogChannel
   {
   public:
      FileLogChannel(const std::string& filename, const std::string& fmt = "%t")
         : LogChannel(fmt)  { setFile(filename); }      

      virtual ~FileLogChannel(){fstrm.close();}


      virtual void setFile(const std::string& filename)
      {
         fstrm.open(filename.c_str());
         logFile = filename;
      }

      virtual void log(const LogMessage& msg)
      {
         fstrm << getLogText(msg) << std::endl;        
      }

   protected:
      std::string logFile;
      std::ofstream fstrm;
   };
}   // End of namespace gpstk


#endif  //GPSTK_LOGCHANNEL_HPP

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