LumiBlockMuTool.h

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/*
  Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
*/

 
#ifndef LUMIBLOCKCOMPS_LumiBlockMuTool_H
#define LUMIBLOCKCOMPS_LumiBlockMuTool_H
 
#include "LumiBlockComps/ILumiBlockMuTool.h"
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "StoreGate/ReadHandleKey.h"
#include "xAODEventInfo/EventInfo.h"
#include "StoreGate/ReadDecorHandleKey.h"
 
#include <string>
 
// Usually this will be called to retrieve the mu value directly from EventInfo
// For data which doesn't have this (or to write it there in the first place)
// this can be configured to read the mu value from COOL instead.
//
class LumiBlockMuTool: public extends<AthAlgTool, ILumiBlockMuTool> {
 
 public:
  // Use base class constructor
  using base_class::base_class;
 
  // ---------------- user interface -------------------
 
  // Return interactions per crossing (mu) averaged over all BCIDs in physics bunch group
  virtual float averageInteractionsPerCrossing(const EventContext& ctx) const override final;
 
  // Return interactions per crossing (mu) for this specific BCID
  virtual float actualInteractionsPerCrossing(const EventContext& ctx) const override final;
 
  // Functions
  virtual StatusCode initialize() override;
 
 private:
  SG::ReadHandleKey<xAOD::EventInfo>       m_eventInfoKey{this
      ,"EventInfoKey"
      ,"EventInfo"
      ,"RHK for EventInfo"};
 
  SG::ReadDecorHandleKey<xAOD::EventInfo>  m_rdhkActMu {this
      ,"actualInteractionsPerCrossingKey"
      ,m_eventInfoKey, "actualInteractionsPerCrossing"
      ,"Decoration for Actual Interaction Per Crossing"};
 
  SG::ReadDecorHandleKey<xAOD::EventInfo>  m_rdhkAveMu {this
      ,"averageInteractionsPerCrossingKey"
      ,m_eventInfoKey, "averageInteractionsPerCrossing"
      ,"Decoration for Average Interaction Per Crossing"};
};
 
 
#endif