JetGhostMergingAlg.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/

//   JetGhostMergingAlg
//
//   Ghost merger algorithm merges multiple collections of ghost
//   containers into one. This is useful for combining standard and
//   LRT ghost tracks into a single collection to pass to
//   downstream taggers.

 
#ifndef JET_ANALYSIS_ALGORITHMS__JET_GHOST_MERGING_ALG_H
#define JET_ANALYSIS_ALGORITHMS__JET_GHOST_MERGING_ALG_H
 
#include <AnaAlgorithm/AnaReentrantAlgorithm.h>
#include <xAODJet/JetContainer.h>
 
#include <AsgTools/PropertyWrapper.h>
#include <AsgDataHandles/WriteHandle.h>
#include <AsgDataHandles/WriteHandleKey.h>
#include <AsgDataHandles/WriteDecorHandleKey.h>
#include <AsgDataHandles/ReadHandle.h>
#include <AsgDataHandles/ReadHandleKey.h>
#include <AsgDataHandles/ReadDecorHandleKey.h>
 
#include <string>
#include <vector>
 
namespace CP
{
  class JetGhostMergingAlg final : public EL::AnaReentrantAlgorithm
  {
  public:
    using EL::AnaReentrantAlgorithm::AnaReentrantAlgorithm;
 
  public:
    StatusCode initialize () override;
 
  public:
    StatusCode execute (const EventContext &ctx) const override;
 
  private:
    SG::ReadHandleKey<xAOD::JetContainer> m_jetLocation {
      this, "JetCollection", "AntiKt4EMTopoJets"
    };

    SG::WriteDecorHandleKey< xAOD::JetContainer > m_mergedGhostContainer {
      this, "MergedGhostName", m_jetLocation, "GhostTrackLRTMerged", "name of the output merged ghost decoration on the JetCollection"
    };
 
  private:
    std::vector<SG::ReadDecorHandleKey<xAOD::JetContainer>> m_ghostTrackKeys;
 
  private:
    Gaudi::Property<std::vector<std::string>> m_inputGhostTrackNames {
      this, "InputGhostTrackNames", {"GhostTrack","GhostTrackLRT"}
    };
 
  };
}
 
#endif // JET_ANALYSIS_ALGORITHMS__JET_GHOST_MERGING_ALG_H