Tracking/TrkVertexFitter/TrkVertexTools/TrkVertexTools/VertexMergingTool.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
 #ifndef TrkVertexTools_VertexMergingTool_H
 #define TrkVertexTools_VertexMergingTool_H
 
#include "AthenaBaseComps/AthAlgTool.h"
#include "GaudiKernel/ToolHandle.h"
#include "TrkVertexFitterInterfaces/IVertexMergingTool.h"
#include "TrkVertexFitterInterfaces/IVertexFitter.h"
#include "BeamSpotConditionsData/BeamSpotData.h"
 
//xAOD include
#include "xAODTracking/VertexFwd.h"
#include "xAODTracking/TrackParticleFwd.h"
#include "xAODTracking/VertexContainerFwd.h"
#include "xAODTracking/VertexAuxContainer.h"
#include "xAODTracking/TrackParticleContainerFwd.h"
#include "xAODTracking/TrackParticleAuxContainer.h"

 
 
 namespace Trk
 {
  class IVertexFitter; 
 
  class VertexMergingTool : public AthAlgTool, virtual public IVertexMergingTool
  {
  public:
    StatusCode initialize() override;
    
    VertexMergingTool(const std::string& t, const std::string& n, const IInterface*  p);
    
    virtual ~VertexMergingTool();
    
    virtual std::pair<xAOD::VertexContainer*, xAOD::VertexAuxContainer*>
    mergeVertexContainer(const EventContext& ctx, const xAOD::VertexContainer& MyVxCont) const override;
 
  private:
    
    SG::ReadCondHandleKey<InDet::BeamSpotData> m_beamSpotKey { this, "BeamSpotKey", "BeamSpotData", "SG key for beam spot" };
    ToolHandle< Trk::IVertexFitter > m_iVertexFitter;
    bool m_useBeamConstraint;
 
    bool checkCompatibility( const xAOD::Vertex * vx1, const xAOD::Vertex * vx2 ) const;
     
  }; //end of class description
 }//end of namespace definition
 
 #endif