eoLogger.h

// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-

/*
(c) Thales group, 2010

    This library 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;
    version 2 of the License.

    This library 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 this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

Contact: http://eodev.sourceforge.net

Authors:
Johann Dréo <johann.dreo@thalesgroup.com>
Caner Candan <caner.candan@thalesgroup.com>

*/

#ifndef eoLogger_h
#define eoLogger_h

#include <map>
#include <vector>
#include <string>
#include <iosfwd>

#include "eoObject.h"
#include "eoParser.h"

namespace eo
{
    enum Levels {quiet = 0,
                 errors,
                 warnings,
                 progress,
                 logging,
                 debug,
                 xdebug};

    struct file
    {
        file(const std::string f);
        const std::string _f;
    };

    struct setlevel
    {
        setlevel(const std::string v);
        setlevel(const Levels lvl);
        const std::string _v;
        const Levels _lvl;
    };
}

class eoLogger : public eoObject,
                 public std::ostream
{
public:
    eoLogger();

    eoLogger(eo::file file);

    ~eoLogger();

    virtual std::string className() const;

    void printLevels() const;

    inline eo::Levels getLevelSelected() const { return _selectedLevel; }

    inline eo::Levels getLevelContext() const { return _contextLevel; }

protected:
    void addLevel(std::string name, eo::Levels level);

private:
    void _createParameters( eoParser& );

    void _init();

private:
    class outbuf : public std::streambuf
    {
    public:
        outbuf(const int& fd, const eo::Levels& contexlvl, const eo::Levels& selectedlvl);
    protected:
        virtual int overflow(int_type c);
    private:
        const int& _fd;
        const eo::Levels& _contextLevel;
        const eo::Levels& _selectedLevel;
    };

private:
    typedef std::map<std::string, eo::Levels> MapLevel;

public:

    friend eoLogger& operator<<(eoLogger&, const eo::Levels);


    friend eoLogger& operator<<(eoLogger&, eo::file);


    friend eoLogger& operator<<(eoLogger&, eo::setlevel);



    friend eoLogger& operator<<(eoLogger&, std::ostream&);

private:
    friend void make_verbose(eoParser&);

    eoValueParam<std::string> _verbose;
    eoValueParam<bool> _printVerboseLevels;
    eoValueParam<std::string> _output;

    eo::Levels _selectedLevel;
    eo::Levels _contextLevel;

    int _fd;

    outbuf _obuf;

    MapLevel _levels;

    std::vector<std::string> _sortedLevels;

    std::map< std::ostream*, int > _standard_io_streams;
};

void make_verbose(eoParser&);

namespace eo
{
    extern eoLogger log;
}

#endif // !eoLogger_h