xAODEvent.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
// xAODEvent.h
// Header file for classes xAODTEvent and xAODREvent
// Author: Johannes Elmsheuser, Will Buttinger
#ifndef ATHENAROOTCOMPS_XAODEVENT_H
#define ATHENAROOTCOMPS_XAODEVENT_H
 
// These classes exist purely to gain public access to the getInputObject method of
// xAOD::Event. We need this because we cannot use the templated retrieve method.
// xAODTEvent reads TTree and xAODREvent reads RNTuple input files.
 
 
#include "xAODRootAccess/TEvent.h"
#include "xAODRootAccess/REvent.h"
 
#include <string>
#include <typeinfo>
 
namespace xAOD {
 
class xAODTEvent : public xAOD::TEvent
{
 public:
  xAODTEvent(EAuxMode mode = kClassAccess)
    : xAOD::TEvent (mode)
  {
    m_ctx = Gaudi::Hive::currentContext();
  }
  using TEvent::getInputObject;
};
 
class xAODREvent : public xAOD::Experimental::REvent
{
 public:
  xAODREvent()
  {
    m_ctx = Gaudi::Hive::currentContext();
  }
  using REvent::getInputObject;
};

inline const void* getInputObject(xAOD::Event& event, const std::string& key,
                                  const std::type_info& ti, bool silent, bool metadata)
{
  if (auto* tevent = dynamic_cast<xAODTEvent*>(&event)) {
    return tevent->getInputObject(key, ti, silent, metadata);
  }
  if (auto* revent = dynamic_cast<xAODREvent*>(&event)) {
    return revent->getInputObject(key, ti, silent, metadata);
  }
  return nullptr;
}
 
} //> end namespace xAOD
 
#endif //> !ATHENAROOTCOMPS_XAODEVENT_H