HiveDataObj.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef ATHEXHIVE_HIVEDATAOBJ_H
#define ATHEXHIVE_HIVEDATAOBJ_H
 
//sample data class for the Read/Write example
//it just wraps an int. Notice that is does not inherit from Gaudi DataObject
 
//a dummy base class to test the symlinks
class BaseClass { };
 
class HiveDataObj {
 
public: 
 
  HiveDataObj():m_val(0) {};
  HiveDataObj(int i): m_val(i) {};
  virtual ~HiveDataObj() = default;
 
  void val(int i) { m_val = i; }
  int val() const { return m_val; }
 
  typedef std::true_type thread_safe;
 
private:
  int m_val;
};
 
 
#include <format>
namespace std {
 
template <>
struct formatter<HiveDataObj>
  : public formatter<string_view>
{
  template <class FmtContext>
  FmtContext::iterator format (const HiveDataObj& io, FmtContext& ctx) const
  {
    return std::format_to (ctx.out(), "{}", io.val());
  }
};
 
} // namespace std
 
 
//using the macros below we can assign an identifier (and a version) 
//to the type HiveDataObj
//This is required and checked at compile time when you try to record/retrieve
#include "AthenaKernel/CLASS_DEF.h"
CLASS_DEF( HiveDataObj , 37539154 , 1 )
 
#endif