/data/refman/pasoursint/CMSSW_5_3_9_patch3/src/Fireworks/Core/src/FWBeamSpot.cc

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#include "Fireworks/Core/interface/FWBeamSpot.h"
#include "DataFormats/BeamSpot/interface/BeamSpot.h"
#include "FWCore/Common/interface/EventBase.h"
#include "Fireworks/Core/interface/fwLog.h"

void FWBeamSpot::checkBeamSpot(const edm::EventBase* event)
{ 
   try
   {
      edm::InputTag tag("offlineBeamSpot");
      edm::Handle<reco::BeamSpot> spot;

      event->getByLabel(tag, spot);
      if (spot.isValid())
      {
         m_beamspot = spot.product();
      }
      else
      {
         m_beamspot = 0;
      }
   }
   catch (cms::Exception& iException)
   {
      fwLog(fwlog::kError) <<"FWBeamSpot::checkBeamSpot failed "<<iException.what() <<std::endl;
      m_beamspot = 0;
   }
}

double FWBeamSpot::x0() const
{
   return m_beamspot ? m_beamspot->x0() : 0.0;
}

double FWBeamSpot::y0() const
{
   return m_beamspot ? m_beamspot->y0() : 0.0;
}

double FWBeamSpot::z0() const
{
   return m_beamspot ? m_beamspot->z0() : 0.0;
}

double FWBeamSpot::x0Error() const
{
   return m_beamspot ? m_beamspot->x0Error() : 0.0;
}

double FWBeamSpot::y0Error() const
{
   return m_beamspot ? m_beamspot->y0Error() : 0.0;
}

double FWBeamSpot::z0Error() const
{
   return m_beamspot ? m_beamspot->z0Error() : 0.0;
}