Photon_v1.cxx

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/*
  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
*/
 
// $Id: Photon_v1.cxx 741489 2016-04-20 01:30:34Z christos $
 
// EDM include(s):
#include "xAODCore/AuxStoreAccessorMacros.h"
#include "TruthUtils/ParticleConstants.h"
 
// Local include(s):
#include "xAODEgamma/versions/Photon_v1.h"
#include "PhotonAccessors_v1.h"
 
#include <stdexcept>
 
namespace xAOD {
 
   Photon_v1::Photon_v1()
      : Egamma_v1() {
 
   }
 
  Photon_v1::Photon_v1(const Photon_v1& ph) : Egamma_v1(ph){
    makePrivateStore(ph);  
  }
 
  Photon_v1& Photon_v1::operator=(const Photon_v1& ph ){
 
    if (this != &ph){ // protect against invalid self-assignment      
      this->Egamma_v1::operator=( ph );
    }
    // by convention, always return *this
    return *this;
  }  
 
   Type::ObjectType Photon_v1::type() const {
 
      return Type::Photon;
   }
 
   double Photon_v1::m() const {
      return ParticleConstants::photonMassInMeV;
   }
 
   double Photon_v1::e() const {
      // for a massless particle E = pT * cosh(eta)
      return pt() * std::cosh(eta());
   }
 
   double Photon_v1::rapidity() const {
      // massless rapidity is the same as pseudorapidity
      return eta();
   }
 
   //
   //       Implementation of the vertex handling functions
   //
 
   const xAOD::Vertex* Photon_v1::vertex( size_t index ) const {
 
      if( index >= nVertices() ) {
         return nullptr;
      }
      const VxELVec_t& links = vertexLinks();
      if( ! links[ index ].isValid() ) {
         return nullptr;
      }
      return *( links[ index ] );
   }
 
   const ElementLink< VertexContainer >&
   Photon_v1::vertexLink( size_t index ) const {
 
      if( index >= nVertices() ) {
         static const ElementLink< VertexContainer > dummy;
         return dummy;
      }
      return vertexLinks()[ index ];
   }
 
   AUXSTORE_OBJECT_SETTER_AND_GETTER( Photon_v1, Photon_v1::VxELVec_t,
                                      vertexLinks, setVertexLinks )
 
   size_t xAOD::Photon_v1::nVertices() const {
 
      static const SG::AuxElement::Accessor< Photon_v1::VxELVec_t >
         vertexAcc( "vertexLinks" );
 
      if( vertexAcc.isAvailable( *this ) ) {
         return vertexAcc( *this ).size();
      }
      return 0;
   }
 
   //
 
  //Implementation of the summary value accessor functions
 
  bool Photon_v1::vertexCaloMatchValue( float& value, const EgammaParameters::VertexCaloMatchType information ) const {
 
    const xAOD::Photon_v1::Accessor< float >* acc = vertexCaloMatchAccessorV1( information );
    if( ! acc ) { 
      return false;
    }
    if(! acc->isAvailable( *this) ) {
      return  false;
    }
    // Retrieve the value:
    value = ( *acc )( *this );
    return true;
  }
 
  float Photon_v1::vertexCaloMatchValue( const EgammaParameters::VertexCaloMatchType information ) const {
 
    const xAOD::Photon_v1::Accessor< float >* acc = vertexCaloMatchAccessorV1( information );
    if(! acc ) throw std::runtime_error( "Unknown/Unavailable Vertex to Calo Match type requested" );
    // Retrieve the value:
    return ( *acc )( *this );
  }
 
  bool Photon_v1::setVertexCaloMatchValue( const float value, 
                                           const EgammaParameters::VertexCaloMatchType information ) {
 
    const xAOD::Photon_v1::Accessor< float >* acc =  vertexCaloMatchAccessorV1( information );
    if( ! acc ) return false;
    // Set the value:
    ( *acc )( *this ) = value;
    return true;
  }
 
 
} // namespace xAOD