/data/refman/pasoursint/CMSSW_6_1_1/src/TrackPropagation/SteppingHelixPropagator/plugins/SteppingHelixPropagatorESProducer.cc

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#include "SteppingHelixPropagatorESProducer.h"
#include "MagneticField/Engine/interface/MagneticField.h"
#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"
#include "MagneticField/VolumeBasedEngine/interface/VolumeBasedMagneticField.h"

#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/Framework/interface/ModuleFactory.h"
#include "FWCore/Framework/interface/ESProducer.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include <string>
#include <memory>

using namespace edm;

SteppingHelixPropagatorESProducer::SteppingHelixPropagatorESProducer(const edm::ParameterSet & p) 
{
  std::string myname = p.getParameter<std::string>("ComponentName");
  pset_ = p;
  setWhatProduced(this,myname);
}

SteppingHelixPropagatorESProducer::~SteppingHelixPropagatorESProducer() {}

boost::shared_ptr<Propagator> 
SteppingHelixPropagatorESProducer::produce(const TrackingComponentsRecord & iRecord){ 
//   if (_propagator){
//     delete _propagator;
//     _propagator = 0;
//   }
  ESHandle<MagneticField> magfield;
  iRecord.getRecord<IdealMagneticFieldRecord>().get(magfield );

  std::string pdir = pset_.getParameter<std::string>("PropagationDirection");

  PropagationDirection dir = alongMomentum;
  
  if (pdir == "oppositeToMomentum") dir = oppositeToMomentum;
  if (pdir == "alongMomentum") dir = alongMomentum;
  if (pdir == "anyDirection") dir = anyDirection;
  
  SteppingHelixPropagator* shProp = new SteppingHelixPropagator(&(*magfield), dir);

  bool useInTeslaFromMagField = pset_.getParameter<bool>("useInTeslaFromMagField");
  bool setVBFPointer = pset_.getParameter<bool>("SetVBFPointer");
  bool useMagVolumes = pset_.getParameter<bool>("useMagVolumes");

  // if useMagVolumes == true and an alternate VBF field is not specified with setVBFPointer,
  // Force "useInTeslaFromMagField=true" for a B=0 VBF map.
  if (useMagVolumes==true && !useInTeslaFromMagField && !setVBFPointer && magfield->nominalValue() == 0) {
    const VolumeBasedMagneticField* vbfCPtr = dynamic_cast<const VolumeBasedMagneticField*>(&(*magfield));
    if (vbfCPtr ==0 ){
      edm::LogWarning("SteppingHelixPropagator") << "Config specifies useMagVolumes==True but no VBF field available: SHP has no access to yoke material properties. Use setVBFPointer=true and VBFName cards to set a VBF field, otherwise set useMagVolumes==False." << std::endl;
    } else {
      edm::LogInfo("SteppingHelixPropagator") << "Config specifies useMagVolumes==true and VBF field available: Forcing useInTeslaFromMagField = True." <<std::endl;
      useInTeslaFromMagField = true;
    }
  }

  if (setVBFPointer){
    std::string vbfName = pset_.getParameter<std::string>("VBFName");
    ESHandle<MagneticField> vbfField;
    iRecord.getRecord<IdealMagneticFieldRecord>().get(vbfName, vbfField );
    const VolumeBasedMagneticField* vbfCPtr = dynamic_cast<const VolumeBasedMagneticField*>(&(*vbfField));
    if (vbfField.isValid()) shProp->setVBFPointer(vbfCPtr);
  }

  shProp->setUseInTeslaFromMagField(useInTeslaFromMagField);

  bool haveX0Corr = pset_.getParameter<bool>("ApplyRadX0Correction");
  shProp->applyRadX0Correction(haveX0Corr);

  bool assumeNoMaterial = pset_.getParameter<bool>("AssumeNoMaterial");
  shProp->setMaterialMode(assumeNoMaterial);

  bool noErrorPropagation = pset_.getParameter<bool>("NoErrorPropagation");
  shProp->setNoErrorPropagation(noErrorPropagation);

  bool debugMode = pset_.getParameter<bool>("debug");
  shProp->setDebug(debugMode);

  shProp->setUseMagVolumes(useMagVolumes);

  bool useMatVolumes = pset_.getParameter<bool>("useMatVolumes");
  shProp->setUseMatVolumes(useMatVolumes);

  bool useIsYokeFlag = pset_.getParameter<bool>("useIsYokeFlag");
  shProp->setUseIsYokeFlag(useIsYokeFlag);

  bool returnTangentPlane = pset_.getParameter<bool>("returnTangentPlane");
  shProp->setReturnTangentPlane(returnTangentPlane);

  bool sendLogWarning = pset_.getParameter<bool>("sendLogWarning");
  shProp->setSendLogWarning(sendLogWarning);

  bool useTuningForL2Speed = pset_.getParameter<bool>("useTuningForL2Speed");
  shProp->setUseTuningForL2Speed(useTuningForL2Speed);


  bool useECoffsets = pset_.getParameter<bool>("useEndcapShiftsInZ");
  if (useECoffsets){
    double valPos = pset_.getParameter<double>("endcapShiftInZPos");
    double valNeg = pset_.getParameter<double>("endcapShiftInZNeg");
    shProp->setEndcapShiftsInZPosNeg(valPos, valNeg);
  }

  _propagator  = boost::shared_ptr<Propagator>(shProp);
  return _propagator;
}