grid_processor.h

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#ifndef GRID_PROCESSOR_CLASS
#define GRID_PROCESSOR_CLASS

/*****************************************************************************\
*                                                                             *
*  Name   : grid_processor                                                    *
*  Author : Chris Koeritz                                                     *
*                                                                             *
*******************************************************************************
* Copyright (c) 2008-$now By Author.  This program is free software; you can  *
* redistribute it and/or modify it under the terms of the GNU General Public  *
* License as published by the Free Software Foundation; either version 2 of   *
* the License or (at your option) any later version.  This is online at:      *
*     http://www.fsf.org/copyleft/gpl.html                                    *
* Please send any updates to: fred@gruntose.com                               *
\*****************************************************************************/

#include "query_handler.h"

// forward.
class byte_filer;
class float_array;
class time_stamp;


class DB_FREETDS_CLASS_STYLE grid_processor
{
public:
  grid_processor(query_handler &work_with);

  virtual ~grid_processor();

  IMPLEMENT_CLASS_NAME("grid_processor");

  void process_grid_files(const istring &grid_storage_folder,
          const istring &df_storage_dir,
          database_login_info &persistent_login_info);

  bool process_query_as_df(const istring &query, int data_source,
          const istring &df_storage_dir, const istring &key_column,
          const string_array &row_names, float_array &multipliers);

  void write_data_fields(int data_source, const istring &df_storage_dir,
          const istring &key_column, const string_array &row_names,
          float_array &multipliers);

  bool write_fields_for_row(byte_filer &df_file, int data_source,
          const istring &key_column, const string_array &row_names,
          float_array &multipliers, int_set &rows_seen);

  bool write_bogus_row(byte_filer &df_file, int data_source, int row_number);

  void reset_data_fields(const istring &df_storage_dir, int data_source);

private:
  query_handler &_querier;  
  istring _last_grid_seen;  
  time_stamp *_startup_time;  
  bool _complain_on_missing_grid;  
};

#endif

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