IDBInitializer.h

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#ifndef GUM_LEARNING_IDB_INITILIALIZER_H
#define GUM_LEARNING_IDB_INITILIALIZER_H

#include <vector>
#include <string>

#include <agrum/agrum.h>
#include <agrum/learning/database/DBCell.h>
#include <agrum/learning/database/DBRow.h>


namespace gum {

  namespace learning {

    template < template < typename > class ALLOC >
    class IDBInitializer {
      public:
      enum class InputType : char { STRING, DBCELL };

      using allocator_type = ALLOC< std::string >;

      // ##########################################################################
      // ##########################################################################


      IDBInitializer(const InputType type, const allocator_type& alloc);

      IDBInitializer(const IDBInitializer< ALLOC >& from);

      IDBInitializer(const IDBInitializer< ALLOC >& from,
                     const allocator_type&          alloc);

      IDBInitializer(IDBInitializer< ALLOC >&& from);

      IDBInitializer(IDBInitializer< ALLOC >&& from, const allocator_type& alloc);

      virtual IDBInitializer< ALLOC >* clone() const = 0;

      virtual IDBInitializer< ALLOC >*
         clone(const allocator_type& alloc) const = 0;

      virtual ~IDBInitializer();



      // ##########################################################################
      // ##########################################################################

      const std::vector< std::string, ALLOC< std::string > >& variableNames();


      template < template < template < typename > class > class DATABASE >
      void fillDatabase(DATABASE< ALLOC >& database,
                        const bool         retry_insertion = false);

      std::size_t throwingColumn() const;

      allocator_type getAllocator() const;



      protected:
      IDBInitializer< ALLOC >& operator=(const IDBInitializer< ALLOC >& from);

      IDBInitializer< ALLOC >& operator=(IDBInitializer< ALLOC >&& from);

      virtual std::vector< std::string, ALLOC< std::string > >
         _variableNames() = 0;


      virtual const std::vector< std::string, ALLOC< std::string > >&
         _currentStringRow();


      virtual const DBRow< DBCell, ALLOC >& _currentDBCellRow();

      virtual bool _nextRow() = 0;


#ifndef DOXYGEN_SHOULD_SKIP_THIS

      private:
      // the names of the variables
      std::vector< std::string, ALLOC< std::string > > __var_names;

      // the types of the input data read to fill the database
      InputType __input_type;

      // indicates whether an exception was raised when adding the last row
      // into the database. If so, when filling again the database, we may
      // try to insert again the same row
      bool __last_insertion_failed{false};


      template < template < template < typename > class > class DATABASE >
      void __fillDatabaseFromStrings(DATABASE< ALLOC >& database,
                                     const bool         retry_insertion);

      template < template < template < typename > class > class DATABASE >
      void __fillDatabaseFromDBCells(DATABASE< ALLOC >& database,
                                     const bool         retry_insertion);

#endif /* DOXYGEN_SHOULD_SKIP_THIS */
    };

  } /* namespace learning */

} /* namespace gum */

// always include the template implementation
#include <agrum/learning/database/IDBInitializer_tpl.h>

#endif /* GUM_LEARNING_IDB_INITILIALIZER_H */