#ifndef TLog_hh
#define TLog_hh

#include <sstream>
#include <iostream>

#include "TObject.h"
#include "TNamed.h"
#include "TString.h"

/* globally available logging class
 * 
 * usage:
 * gLog << <anything> << TLog::END;
 * gLog << TLog::INFO << <anything> << <more> << TLog::END;
 *
 * gLog.SetLogLevel(TLog::WARNING);
 */

using namespace std;

class TLog : public TObject{
 
private:
  
  ostringstream ostr;
  
public : 
  
  TLog();
  TLog(const TLog& _tlog);
  ~TLog();
  
  enum Level   {
    VERBOSE,
    DEBUG,
    INFO,
    WARNING,
    ERROR,
    END
  };

  void  SetLogLevel(Level level){g_level = level;};
  Level GetLogLevel(){return g_level;};

  void  SetLocalLogLevel(Level level){_level = level;};
  Level GetLocalLogLevel(){return _level;};
  
  TLog& operator<<(Level level);

  template <class myNumber> 
  TLog& operator<<(myNumber val){
  if( g_level <= _level ) ostr << val;
  return *this;  
  };
  
  
protected:
    
private:
  
  Level   g_level;                 // global Logging Level
  Level   _level;                  // local Logging Level
  TString s_Level[(const int)END]; // Logging Level in StringArray
  
  ClassDef(TLog, 1)

    };

R__EXTERN TLog gLog;
  
#endif