IVertexFinder.h

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/*
  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
*/
 
/***************************************************************************
                          IVertexFinder.h  -  Description
                             -------------------
    begin   : 14-02-2006
    authors : Andreas Wildauer (CERN PH-ATC)
            : Giacinto Piacquadio (Freiburg University), Kirill Prokofiev
 (Sheffield University) email   : andreas.wildauer@cern.ch
              giacinto.piacquadio@physik.uni-freiburg.de
    changes : David Shope <david.richard.shope@cern.ch> (2016-04-26)
 
                EDM Migration to xAOD - from Trk::VxCandidate to xAOD::Vertex
 
                findVertex will now always return an xAOD::VertexContainer,
                even when using a TrackCollection or a
 TrackParticleBaseCollection as input.
 
            : Christos Anastopoulos Athena MT
 ***************************************************************************/
 
#ifndef InDetRecToolInterfaces_IVertexFinder_H
#define InDetRecToolInterfaces_IVertexFinder_H
#include "GaudiKernel/AlgTool.h"
#include "GaudiKernel/EventContext.h"
#include "GaudiKernel/ThreadLocalContext.h"
#include "TrkParticleBase/TrackParticleBaseCollection.h"
#include "TrkTrack/TrackCollection.h"
 
// xAOD includes
#include "xAODTracking/TrackParticleAuxContainer.h"
#include "xAODTracking/TrackParticleContainerFwd.h"
#include "xAODTracking/TrackParticleFwd.h"
#include "xAODTracking/VertexAuxContainer.h"
#include "xAODTracking/VertexContainerFwd.h"
#include "xAODTracking/VertexFwd.h"
 
namespace InDet {
static const InterfaceID IID_IVertexFinder("IVertexFinder", 1, 0);
class IVertexFinder : virtual public IAlgTool
{
public:
  virtual ~IVertexFinder(){};
  static const InterfaceID& interfaceID() { return IID_IVertexFinder; }
 
  virtual std::pair<xAOD::VertexContainer*, xAOD::VertexAuxContainer*>
  findVertex(const EventContext& ctx,
             const TrackCollection* trackTES) const = 0;
 
  virtual std::pair<xAOD::VertexContainer*, xAOD::VertexAuxContainer*>
  findVertex(const EventContext& ctx,
             const xAOD::TrackParticleContainer* trackParticles) const = 0;
 
  /* 
   * Non Event context aware methods.
   * Can be remove when all clients move to EventContext 
   * aware calls
   */
 
  virtual std::pair<xAOD::VertexContainer*, xAOD::VertexAuxContainer*>
  findVertex(const TrackCollection* trackTES) const
  {
    return findVertex(Gaudi::Hive::currentContext(), trackTES);
  }
 
  virtual std::pair<xAOD::VertexContainer*, xAOD::VertexAuxContainer*>
  findVertex(const xAOD::TrackParticleContainer* trackParticles) const
  {
    return findVertex(Gaudi::Hive::currentContext(), trackParticles);
  }
};
}
#endif