Class to hold N-to-one aassociations between tracks and vertices. More...

#include <TrackVertexAssociation.h>

Collaboration diagram for jet::TrackVertexAssociation:

Public Member Functions
	TrackVertexAssociation (const xAOD::TrackParticleContainer *trkCont=0)
void	associate (const xAOD::TrackParticle trk, const xAOD::Vertex vtx)
const xAOD::Vertex *	associatedVertex (const xAOD::TrackParticle *trk) const
std::vector< const xAOD::TrackParticle * >	associatedTracks (const xAOD::Vertex *vtx) const

Protected Attributes
std::vector< const xAOD::Vertex * >	m_vertex
const xAOD::TrackParticleContainer *	m_trackContainer

Detailed Description

Class to hold N-to-one aassociations between tracks and vertices.

It is assumed the track container is the one that directly holds the tracks, i.e. is not a view container.

Definition at line 23 of file TrackVertexAssociation.h.

Constructor & Destructor Documentation

◆ TrackVertexAssociation()

jet::TrackVertexAssociation::TrackVertexAssociation ( const xAOD::TrackParticleContainer * trkCont = 0 )

Definition at line 9 of file TrackVertexAssociation.cxx.

                                                                                           : 
    m_trackContainer(trkCont) {
    // Check if this is a view container, in which case we need to use the size of the owning container.
    size_t Ntracks = trkCont->size();
    if(Ntracks>0 && trkCont->ownPolicy() != SG::OWN_ELEMENTS) {
      Ntracks = trkCont->front()->container()->size_v();
    }
    m_vertex.resize(Ntracks, nullptr );
  }

Member Function Documentation

◆ associate()

void jet::TrackVertexAssociation::associate	(	const xAOD::TrackParticle *	trk,
		const xAOD::Vertex *	vtx )

Definition at line 19 of file TrackVertexAssociation.cxx.

                                                                                           {
    m_vertex[ trk->index() ] = vtx;
  }

◆ associatedTracks()

std::vector< const xAOD::TrackParticle * > jet::TrackVertexAssociation::associatedTracks ( const xAOD::Vertex * vtx ) const

Definition at line 27 of file TrackVertexAssociation.cxx.

  {
    std::vector<const xAOD::TrackParticle*> tracks;
    for (size_t iTrack = 0; iTrack < m_trackContainer->size(); ++iTrack)
      if (associatedVertex(m_trackContainer->at(iTrack))->index() == vtx->index())
        tracks.push_back(m_trackContainer->at(iTrack));
 
    return tracks;
  }

◆ associatedVertex()

const xAOD::Vertex * jet::TrackVertexAssociation::associatedVertex ( const xAOD::TrackParticle * trk ) const

Definition at line 23 of file TrackVertexAssociation.cxx.

                                                                                               {
    return m_vertex[trk->index()];
  }

Member Data Documentation

◆ m_trackContainer

const xAOD::TrackParticleContainer* jet::TrackVertexAssociation::m_trackContainer

protected

Definition at line 42 of file TrackVertexAssociation.h.

◆ m_vertex

std::vector<const xAOD::Vertex*> jet::TrackVertexAssociation::m_vertex