VectorExploderAlg.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef FLAVORTAGJETDECORATORS_VECTOR_EXPLODER_ALG_H
#define FLAVORTAGJETDECORATORS_VECTOR_EXPLODER_ALG_H
 
#include "AthenaBaseComps/AthReentrantAlgorithm.h"
#include "StoreGate/ReadHandleKey.h"
#include "StoreGate/ReadDecorHandleKey.h"
#include "StoreGate/WriteDecorHandleKey.h"
 
#include "xAODJet/JetContainer.h"
 
#include <map>
#include <string>
#include <vector>
#include <utility>
 
namespace FlavorTagJetDecorators {

 
  class VectorExploderAlg : public AthReentrantAlgorithm {
  public:
    VectorExploderAlg(const std::string& name, ISvcLocator* pSvcLocator);
 
    virtual StatusCode initialize() override;
    virtual StatusCode execute(const EventContext& ctx) const override;
 
  private:
    SG::ReadHandleKey<xAOD::JetContainer> m_collectionKey{
      this, "Collection", "AntiKt4EMPFlowJets",
      "Input jet collection to read decorations from"};

    SG::ReadDecorHandleKey<xAOD::JetContainer> m_inputVectorKey{
      this, "InputVectorName", m_collectionKey, "",
      "Name of the input vector decoration to explode"};

    Gaudi::Property<std::map<int, std::string>> m_outputNamesMap{
      this, "OutputNamesMap", {},
      "Mapping between indices and names for the output scalar decorations"};

    std::vector<std::pair<int, SG::WriteDecorHandleKey<xAOD::JetContainer>>> m_outputKeys;

    int m_maxIndex{-1};
  };
 
}  // namespace FlavorTagJetDecorators
 
#endif  // FLAVORTAGJETDECORATORS_VECTOR_EXPLODER_ALG_H