IAccessor.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
#ifndef _ExpressionParsing_IAccessor_h_
#define _ExpressionParsing_IAccessor_h_
 
#include <string>
#include <vector>
class EventContext;
 
namespace ExpressionParsing {

   class IAccessor {
   public :
      enum VariableType { VT_UNK, VT_INT, VT_DOUBLE, VT_VECINT, VT_VECDOUBLE, VT_VECEMPTY };
 
      virtual ~IAccessor() {}
      virtual VariableType variableType(const std::string &var_name) const =0;
      virtual int loadInt(const EventContext& ctx, const std::string &var_name) const = 0;
      virtual double loadDouble(const EventContext& ctx, const std::string &var_name) const = 0;
      virtual std::vector<int> loadVecInt(const EventContext& ctx, const std::string &var_name) const = 0;
      virtual std::vector<double> loadVec(const EventContext& ctx, const std::string &var_name) const = 0;
   };
 
}
#endif