CAmLog.h

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#ifndef CAMLOG_H_
#define CAMLOG_H_

#include <iostream>
#include <iosfwd>
#include <stdio.h>
#include <stdexcept>
#include <fstream>
#include <stdlib.h>
#include <sstream>
#include <assert.h>

#define DEFAULT_LOG_FOLDER      "/tmp/"
#define DEFAULT_LOGFILE_PREFIX "am_dump_"
#define DEFAULT_LOGFILE_EXT     ".log"

#define DEL( aPointer ) delete aPointer, aPointer = NULL;

/* */
typedef enum { eCAmLogNone = 0, eCAmLogStdout = 1, eCAmLogFile = 2 } eCAmLogType;

class CAmLog
{
private:
    class CAmLogger
    {
    protected:
        std::ostream* mOutputStream;
    public:
        CAmLogger ():mOutputStream(NULL) {};
        virtual ~CAmLogger () { };
        virtual void log(const std::string& _s)
        {
            (*mOutputStream) << _s;
            mOutputStream->flush();
        }
        template <class T>
        CAmLogger & operator << (const T & t)
        {
            (*mOutputStream) << t;
            return (*this);
        }
    };

    class CAmFileLogger : public CAmLogger
    {
        std::string mFilename;
    public:
        static void generateLogFilename(std::string &result);
        explicit CAmFileLogger(const std::string& _s) : CAmLogger()
        {
            mFilename = _s;
            mOutputStream = new std::ofstream(mFilename.c_str());
        }
        ~CAmFileLogger();
    };

    class CAmStdOutLogger : public CAmLogger
    {
    public:
        CAmStdOutLogger()
        {
            mOutputStream = &std::cout;
        }
    };

private:
    eCAmLogType mLogType;
    CAmLogger* mLogger;

protected:
    void releaseLogger();
    void instantiateLogger( const eCAmLogType type);
public:
    CAmLog(const eCAmLogType type );
    CAmLog();
    ~CAmLog();

    static CAmLog *getDefaultLog();

    void setLogType( const eCAmLogType type);
    eCAmLogType getLogType() const;

    template <class T>
    CAmLog & operator << (const T & t)
    {
        assert(mLogger!=NULL);
        (*mLogger) << t;
        return (*this);
    }
 };

#define CAmLogger (*CAmLog::getDefaultLog())


#endif /* CAMLOG_H_ */