Types.h

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#pragma once
 
#include <variant>
#include <string>
#include <functional>
#include <stdexcept>
#include <map>
#include <memory>
 
namespace Belle2::VariablePersistenceManager {
 
  enum VariableDataType {
    c_double = 0,
    c_int = 1,
    c_bool = 2
  };

  class Variable {
  public:
    Variable(const std::string& variableName) : name{variableName} {}

    virtual std::string getName() const { return name; }

    virtual ~Variable() = default;
 
  private:
    std::string name; 
  };

  class TypedVariable : public Variable {
  public:
    TypedVariable(const std::string& variableName, const VariableDataType& variableDataType)
      : Variable(variableName)
      , dataType{variableDataType}
    {}

    VariableDataType getDataType() const { return dataType; }
 
  private:
    VariableDataType dataType; 
  };

  class BinnedVariable : public Variable {
  public:
    BinnedVariable(const std::string& variableName, int _nBins, float _lowBin, float _highBin)
      : Variable(variableName)
      , nBins{_nBins}
      , lowBin{_lowBin}
      , highBin{_highBin}
    {}

    int getNbins() const { return nBins; }

    float getLowBin() const { return lowBin; }

    float getHighBin() const { return highBin; }
 
  private:
    int nBins;    
    float lowBin; 
    float highBin;
  };

  typedef std::variant<double, int, bool> VariableType;

  typedef std::vector<std::variant<TypedVariable, BinnedVariable>> Variables;

  typedef std::map<std::string, VariableType> EvaluatedVariables;
}