GenericObjectThinning.h

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/*
  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
*/

// GenericObjectThinning.h, (c) ATLAS Detector software
 
#ifndef DERIVATIONFRAMEWORK_GENERICOBJECTTHINNING_H
#define DERIVATIONFRAMEWORK_GENERICOBJECTTHINNING_H
 
#include <string>
#include <vector>
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "DerivationFrameworkInterfaces/IThinningTool.h"
#include "GaudiKernel/ToolHandle.h"
#include "xAODBase/IParticleContainer.h"
#include "StoreGate/ThinningHandleKey.h"
 
#include "xAODBase/IParticleContainer.h"
#include "ExpressionEvaluation/ExpressionParserUser.h"
 
namespace DerivationFramework {
 
  class GenericObjectThinning : public extends<ExpressionParserUser<AthAlgTool>, IThinningTool> {
    public: 
      GenericObjectThinning(const std::string& t, const std::string& n, const IInterface* p);
      ~GenericObjectThinning();
      virtual StatusCode initialize() override;
      virtual StatusCode finalize() override;
      virtual StatusCode doThinning(const EventContext& ctx) const override;
 
    private:
      StringProperty m_streamName
        { this, "StreamName", "", "Name of the stream being thinned" };
      SG::ThinningHandleKey<xAOD::IParticleContainer> m_SGKey
        { this, "ContainerName", "", "" };
 
      //Expression for object thinning selection
      std::string m_selectionString;
 
      //Counters
      mutable std::atomic<unsigned int> m_ntot, m_npass;
  }; 
}
 
#endif // DERIVATIONFRAMEWORK_GENERICOBJECTTHINNING_H