/data/refman/pasoursint/CMSSW_6_1_2_SLHC4_patch1/src/RecoLocalMuon/DTRecHit/plugins/DTRecHitProducer.cc

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#include "DTRecHitProducer.h"


#include "FWCore/Framework/interface/Event.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Framework/interface/ESHandle.h"

#include "DataFormats/DTDigi/interface/DTDigiCollection.h"

#include "Geometry/DTGeometry/interface/DTLayer.h"
#include "Geometry/DTGeometry/interface/DTGeometry.h"
#include "Geometry/Records/interface/MuonGeometryRecord.h"
#include "DataFormats/MuonDetId/interface/DTLayerId.h"
#include "DataFormats/DTRecHit/interface/DTRecHit1DPair.h"

#include "RecoLocalMuon/DTRecHit/interface/DTRecHitBaseAlgo.h"
#include "RecoLocalMuon/DTRecHit/interface/DTRecHitAlgoFactory.h"
#include "DataFormats/DTRecHit/interface/DTRecHitCollection.h"
#include <string>


using namespace edm;
using namespace std;




DTRecHitProducer::DTRecHitProducer(const ParameterSet& config){
  // Set verbose output
  debug = config.getUntrackedParameter<bool>("debug", false); 

  if(debug)
    cout << "[DTRecHitProducer] Constructor called" << endl;
  
  produces<DTRecHitCollection>();

  theDTDigiLabel = config.getParameter<InputTag>("dtDigiLabel");
  
  // Get the concrete reconstruction algo from the factory
  string theAlgoName = config.getParameter<string>("recAlgo");
  theAlgo = DTRecHitAlgoFactory::get()->create(theAlgoName,
                                               config.getParameter<ParameterSet>("recAlgoConfig"));
}

DTRecHitProducer::~DTRecHitProducer(){
  if(debug)
    cout << "[DTRecHitProducer] Destructor called" << endl;
  delete theAlgo;
}



void DTRecHitProducer::produce(Event& event, const EventSetup& setup) {
  // Get the DT Geometry
  ESHandle<DTGeometry> dtGeom;
  setup.get<MuonGeometryRecord>().get(dtGeom);

  // Get the digis from the event
  Handle<DTDigiCollection> digis; 
  event.getByLabel(theDTDigiLabel, digis);

  // Pass the EventSetup to the algo
  theAlgo->setES(setup);

  // Create the pointer to the collection which will store the rechits
  auto_ptr<DTRecHitCollection> recHitCollection(new DTRecHitCollection());


  // Iterate through all digi collections ordered by LayerId   
  DTDigiCollection::DigiRangeIterator dtLayerIt;
  for (dtLayerIt = digis->begin();
           dtLayerIt != digis->end();
           ++dtLayerIt){
    // The layerId
    const DTLayerId& layerId = (*dtLayerIt).first;
    // Get the GeomDet from the setup
    const DTLayer* layer = dtGeom->layer(layerId);

    // Get the iterators over the digis associated with this LayerId
    const DTDigiCollection::Range& range = (*dtLayerIt).second;
    
    OwnVector<DTRecHit1DPair> recHits =
      theAlgo->reconstruct(layer, layerId, range);
    
    if(debug)
      cout << "Number of hits in this layer: " << recHits.size() << endl;
    if(recHits.size() > 0) //FIXME: is it really needed?
      recHitCollection->put(layerId, recHits.begin(), recHits.end());
  }

  event.put(recHitCollection);
}



bool
DTRecHitProducer::debug;