EventHistoVarTool.h

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/* this file is -*- C++ -*- 
  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef JETMONITORING_EventVARTOOL_H
#define JETMONITORING_EventVARTOOL_H
 
#include "xAODEventInfo/EventInfo.h"
#include "xAODJet/JetContainer.h"
#include "GaudiKernel/IAlgTool.h"
#include "AthenaBaseComps/AthAlgTool.h"
#include "StoreGate/ReadDecorHandleKey.h"
 
 
static const InterfaceID IID_IEventHistoVarTool("IEventHistoVarTool", 1 , 0); 
 
 
class IEventHistoVarTool : virtual public IAlgTool                         
{
public:
  
  // Retrieve interface ID
  static const InterfaceID& interfaceID() { return IID_IEventHistoVarTool; }
 
  virtual ~IEventHistoVarTool(){}
  
  virtual float value(const xAOD::JetContainer&) const = 0;
  virtual std::string varName() const =0;
};
 
 
class EventHistoVarTool : public AthAlgTool, virtual public IEventHistoVarTool {
public:
  EventHistoVarTool(const std::string & type, const std::string & name, const IInterface* parent);
  virtual ~EventHistoVarTool(){}
 
  virtual StatusCode initialize() ;  
 
  virtual float value(const xAOD::JetContainer&) const;
  virtual std::string varName() const {return m_varName;}
  
  
private:
 
  Gaudi::Property<std::string> m_varName {this,"VarName", ""};
  Gaudi::Property<float> m_defaultValue = {this,"Default", -1.};
  SG::ReadDecorHandleKey<xAOD::EventInfo> m_attName {this, "Attribute", "", "Attribute name retrieved from event info container ('<event info name>.<decoration>'). If no container name prefixed, then EventInfo.<Attribute> is used."};
  
};
 
 
#endif