root/library/bdm/base/loggers.h @ 907

/*!
  \file
  \brief Loggers for storing results of experiments
  \author Vaclav Smidl.

  -----------------------------------
  BDM++ - C++ library for Bayesian Decision Making under Uncertainty

  Using IT++ for numerical operations
  -----------------------------------
*/

#ifndef LGR_H
#define LGR_H

#include "bdmbase.h"
#include "user_info.h"

namespace bdm {
using std::string;

/*!
 * Logging into matrices in data format in memory, optionally persisted into a file.
 */
class memlog : public logger {

protected:
        //! Maximum length of vectors stored in memory
        int maxlen;
        //! Currect record to be written
        int ind;
        //! Storage
        Array<mat> vectors;
        //! name of  file to save results (IT file for vectors and cfg for settings)
        string filename;

        //! this flag is only to assure reentrance of the finalize() method 
        bool file_saved;
public:
        //! convenience constructor
        memlog ( int maxlen0, string fn = "" ) : logger ( "_" ), maxlen ( maxlen0 ), ind ( 0 ), vectors ( 0 ), filename ( fn ), file_saved(false) {}

        //!Default constructor
        memlog() : logger ( "_" ), maxlen ( 0 ), ind ( 0 ), vectors ( 0 ), file_saved(false) {}

        //! Initialize storage
        void init();

        void step() {
                if ( ind < maxlen ) ind++;
                else bdm_error ( "memlog::ind is too high;" );
        }

        void log_vector ( int id, const vec &v ) {
                bdm_assert ( id < vectors.length(), "Logger was not initialized, run init()." );
                if ( id >= 0 ) {
                        vectors ( id ).set_row ( ind, v );
                }
        }
        void logit ( int id, const double &d ) {
                bdm_assert_debug ( id < vectors.length(), "Logger was not initialized, run init()." );
                bdm_assert_debug ( vectors ( id ).cols() == 1, "Vector expected" );
                if ( id >= 0 ) {
                        vectors ( id ) ( ind ) = d;
                }
        }
        //! Save values into an itfile named after \c fname.
        void itsave ( const char* fname );
        //!
        void finalize() {
                if ( filename.length() > 0 && !file_saved ) {
                        itsave ( ( filename + ".it" ).c_str() );
                        if ( settings.length() > 0 ) {
                                setting_conf.writeFile ( ( filename + ".cfg" ).c_str() );
                        }
                        file_saved = true;
                }

        };


        /*! \brief UI for memlog

        \code
        logger = {
                class = "memlog";
                filename = "file_name"; // resulting filename with vectors in it format and setting in cfg
                maxlen = 100;           // size of memory buffer
        }
        \endcode
         */
        void from_setting ( const Setting &set );

        // TODO dodelat void to_setting( Setting &set ) const;
};

UIREGISTER ( memlog );
SHAREDPTR ( memlog );


/*! \brief Simple logger used for debugging
All data records are written out to std from where they could be send to file
*/
class stdlog: public memlog {
public:
        //! default constructor
        stdlog() : memlog ( 1 ) {};

        void init() {
                memlog::init();
                for ( int i = 0; i < entries.length(); i++ ) {
                        if ( entries ( i )._dsize() == 1 ) {
                                cout << names ( i ) << separator << entries ( i ).name ( 0 ) << "\t";
                        } else
                                for ( int j = 0; j < vectors ( i ).cols(); j++ ) {
                                        cout << names ( i ) << separator << entries ( i ).scalarname ( j ) << "\t";
                                }
                }
                cout << endl;


        }
        //!writes everything out
        void step() {
                for ( int i = 0; i < vectors.length(); i++ ) {
                        for ( int j = 0; j < vectors ( i ).cols(); j++ ) {
                                cout << vectors ( i ) ( 0, j ) << "\t";
                        }
                }
                cout << endl;
        }
        /*! \brief UI for stdlog

        \code
        logger = {
                class = "stdlog"; // no parameterization needed
        }
        \endcode
        */
        void from_setting ( const Setting &set ) {
        }
};
UIREGISTER ( stdlog );

/*!
* \brief Logging into dirfile with buffer in memory

* Dirfile is a special format used by the kst program. See documentation of kst for description.
*
* This format is used to store scalars, hence multivariate RVs must be separated.
*/
class dirfilelog : public memlog {

protected:
        //!name of the directory
        string dirname;
        //! Automatically generated
        Array<string> scalarnames;

        //! this flag is only to assure reentrance of the finalize() method 
        bool buffers_written;
public:
        /*!\brief Default constructor
        @param dirname0 name of the directory in which to store the results
        @param maxlen0 length of the memory buffers, when full the buffers will be dumped to HDD and returned to the beginning. */
        dirfilelog ( string dirname0, int maxlen0 ) : memlog ( maxlen0 ), dirname ( dirname0 ), scalarnames ( 0 ), buffers_written(false) {}

        dirfilelog() : buffers_written(false) {}

        //! Initialize storage
        void init();
        void step();
        void finalize();
        /*! \brief Write memory storage to disk.
        @param Len length of buffer to be written, if 0 the file is truncated at 0.
        */
        void write_buffers ( int Len );

        /*! \brief UI for dirfilelog (Kst file format)
        \code
        logger = {
                class = "dirfilelog";
                dirname = "directory_for_files"; // resulting files will be stored there
                maxlen = 100;                    // size of memory buffer, when full results are written to disk
        }
        \endcode
        */
        void from_setting ( const Setting &set );

        // TODO dodelat void to_setting( Setting &set ) const;
};

UIREGISTER ( dirfilelog );
SHAREDPTR ( dirfilelog );

};
#endif // LGR_H