/data/refman/pasoursint/CMSSW_5_2_7_hltpatch2/src/SimGeneral/DataMixingModule/plugins/DataMixingSiPixelWorker.cc

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// File: DataMixingSiPixelWorker.cc
// Description:  see DataMixingSiPixelWorker.h
// Author:  Mike Hildreth, University of Notre Dame
//
//--------------------------------------------

#include <map>
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "FWCore/Framework/interface/ConstProductRegistry.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "DataFormats/Common/interface/Handle.h"
#include "DataFormats/Provenance/interface/Provenance.h"
#include "DataFormats/Provenance/interface/BranchDescription.h"
//
//
#include "DataMixingSiPixelWorker.h"


using namespace std;

namespace edm
{

  // Virtual constructor

  DataMixingSiPixelWorker::DataMixingSiPixelWorker() { sel_=0;} 

  // Constructor 
  DataMixingSiPixelWorker::DataMixingSiPixelWorker(const edm::ParameterSet& ps) : 
                                                            label_(ps.getParameter<std::string>("Label"))

  {                                                         

    // get the subdetector names
    //    this->getSubdetectorNames();  //something like this may be useful to check what we are supposed to do...

    // create input selector
    if (label_.size()>0){
      sel_=new Selector( ModuleLabelSelector(label_));
    }
    else {
      sel_=new Selector( MatchAllSelector());
    }

    // declare the products to produce

    pixeldigi_collectionSig_   = ps.getParameter<edm::InputTag>("pixeldigiCollectionSig");
    pixeldigi_collectionPile_   = ps.getParameter<edm::InputTag>("pixeldigiCollectionPile");
    PixelDigiCollectionDM_  = ps.getParameter<std::string>("PixelDigiCollectionDM");

    // clear local storage for this event                                                                     
    SiHitStorage_.clear();

  }
               

  // Virtual destructor needed.
  DataMixingSiPixelWorker::~DataMixingSiPixelWorker() { 
    delete sel_;
    sel_=0;
  }  



  void DataMixingSiPixelWorker::addSiPixelSignals(const edm::Event &e) { 
    // fill in maps of hits

    LogDebug("DataMixingSiPixelWorker")<<"===============> adding MC signals for "<<e.id();

    Handle< edm::DetSetVector<PixelDigi> >  input;

    if( e.getByLabel(pixeldigi_collectionSig_,input) ) {

      //loop on all detsets (detectorIDs) inside the input collection
      edm::DetSetVector<PixelDigi>::const_iterator DSViter=input->begin();
      for (; DSViter!=input->end();DSViter++){

#ifdef DEBUG
        LogDebug("DataMixingSiPixelWorker")  << "Processing DetID " << DSViter->id;
#endif

        uint32_t detID = DSViter->id;
        edm::DetSet<PixelDigi>::const_iterator begin =(DSViter->data).begin();
        edm::DetSet<PixelDigi>::const_iterator end   =(DSViter->data).end();
        edm::DetSet<PixelDigi>::const_iterator icopy;
  
        OneDetectorMap LocalMap;

        for (icopy=begin; icopy!=end; icopy++) {
          LocalMap.insert(OneDetectorMap::value_type( (icopy->channel()), *icopy ));
        }

        SiHitStorage_.insert( SiGlobalIndex::value_type( detID, LocalMap ) );
      }
 
    }    
  } // end of addSiPixelSignals



  void DataMixingSiPixelWorker::addSiPixelPileups(const int bcr, const EventPrincipal *ep, unsigned int eventNr) {
  
    LogDebug("DataMixingSiPixelWorker") <<"\n===============> adding pileups from event  "<<ep->id()<<" for bunchcrossing "<<bcr;

    // fill in maps of hits; same code as addSignals, except now applied to the pileup events

    boost::shared_ptr<Wrapper<edm::DetSetVector<PixelDigi> >  const> inputPTR =
      getProductByTag<edm::DetSetVector<PixelDigi> >(*ep, pixeldigi_collectionPile_ );

    if(inputPTR ) {

      const edm::DetSetVector<PixelDigi>  *input = const_cast< edm::DetSetVector<PixelDigi> * >(inputPTR->product());



      //   Handle< edm::DetSetVector<PixelDigi> >  input;

      //   if( e->getByLabel(pixeldigi_collectionPile_,input) ) {

      //loop on all detsets (detectorIDs) inside the input collection
      edm::DetSetVector<PixelDigi>::const_iterator DSViter=input->begin();
      for (; DSViter!=input->end();DSViter++){

#ifdef DEBUG
        LogDebug("DataMixingSiPixelWorker")  << "Pileups: Processing DetID " << DSViter->id;
#endif

        uint32_t detID = DSViter->id;
        edm::DetSet<PixelDigi>::const_iterator begin =(DSViter->data).begin();
        edm::DetSet<PixelDigi>::const_iterator end   =(DSViter->data).end();
        edm::DetSet<PixelDigi>::const_iterator icopy;

        // find correct local map (or new one) for this detector ID

        SiGlobalIndex::const_iterator itest;

        itest = SiHitStorage_.find(detID);

        if(itest!=SiHitStorage_.end()) {  // this detID already has hits, add to existing map

          OneDetectorMap LocalMap = itest->second;

          // fill in local map with extra channels
          for (icopy=begin; icopy!=end; icopy++) {
            LocalMap.insert(OneDetectorMap::value_type( (icopy->channel()), *icopy ));
          }

          SiHitStorage_[detID]=LocalMap;
          
        }
        else{ // fill local storage with this information, put in global collection

          OneDetectorMap LocalMap;

          for (icopy=begin; icopy!=end; icopy++) {
            LocalMap.insert(OneDetectorMap::value_type( (icopy->channel()), *icopy ));
          }

          SiHitStorage_.insert( SiGlobalIndex::value_type( detID, LocalMap ) );
        }

      }
    }
  }


 
  void DataMixingSiPixelWorker::putSiPixel(edm::Event &e) {

    // collection of Digis to put in the event

    std::vector< edm::DetSet<PixelDigi> > vPixelDigi;

    // loop through our collection of detectors, merging hits and putting new ones in the output

    // big loop over Detector IDs:

    for(SiGlobalIndex::const_iterator IDet = SiHitStorage_.begin();
        IDet != SiHitStorage_.end(); IDet++) {

      edm::DetSet<PixelDigi> SPD(IDet->first); // Make empty collection with this detector ID
        
      OneDetectorMap LocalMap = IDet->second;

      //counter variables
      int formerPixel = -1;
      int currentPixel;
      int ADCSum = 0;


      OneDetectorMap::const_iterator iLocalchk;

      for(OneDetectorMap::const_iterator iLocal  = LocalMap.begin();
          iLocal != LocalMap.end(); ++iLocal) {

        currentPixel = iLocal->first; 

        if (currentPixel == formerPixel) { // we have to add these digis together
          ADCSum+=(iLocal->second).adc();
        }
        else{
          if(formerPixel!=-1){             // ADC info stolen from SiStrips...
            if (ADCSum > 511) ADCSum = 255;
            else if (ADCSum > 253 && ADCSum < 512) ADCSum = 254;
            PixelDigi aHit(formerPixel, ADCSum);
            SPD.push_back( aHit );        
          }
          // save pointers for next iteration
          formerPixel = currentPixel;
          ADCSum = (iLocal->second).adc();
        }

        iLocalchk = iLocal;
        if((++iLocalchk) == LocalMap.end()) {  //make sure not to lose the last one
          if (ADCSum > 511) ADCSum = 255;
          else if (ADCSum > 253 && ADCSum < 512) ADCSum = 254;
          SPD.push_back( PixelDigi(formerPixel, ADCSum) );        
        } 

      }// end of loop over one detector

      // stick this into the global vector of detector info
      vPixelDigi.push_back(SPD);

    } // end of big loop over all detector IDs

    // put the collection of digis in the event   
    LogInfo("DataMixingSiPixelWorker") << "total # Merged Pixels: " << vPixelDigi.size() ;

    // make new digi collection
    
    std::auto_ptr< edm::DetSetVector<PixelDigi> > MyPixelDigis(new edm::DetSetVector<PixelDigi>(vPixelDigi) );

    // put collection

    e.put( MyPixelDigis, PixelDigiCollectionDM_ );

    // clear local storage for this event
    SiHitStorage_.clear();
  }

} //edm