/data/doxygen/doxygen-1.7.3/gen/CMSSW_4_2_8/src/RecoEcal/EgammaClusterProducers/src/UnifiedSCCollectionProducer.cc

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// C/C++ headers
#include <iostream>
#include <vector>
#include <memory>

// Framework
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "DataFormats/Common/interface/Handle.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Framework/interface/ESHandle.h"
// Reconstruction Classes
#include "DataFormats/EcalRecHit/interface/EcalRecHit.h"
#include "DataFormats/EcalRecHit/interface/EcalRecHitCollections.h"
#include "DataFormats/EcalDetId/interface/EBDetId.h"
#include "DataFormats/EgammaReco/interface/BasicCluster.h"
#include "DataFormats/EgammaReco/interface/SuperCluster.h"
#include "DataFormats/EgammaReco/interface/SuperClusterFwd.h"
#include "DataFormats/EgammaReco/interface/BasicClusterFwd.h"
#include "CondFormats/DataRecord/interface/EcalChannelStatusRcd.h"
#include "CondFormats/EcalObjects/interface/EcalChannelStatus.h"

// Class header file
#include "RecoEcal/EgammaClusterProducers/interface/UnifiedSCCollectionProducer.h"
#include "RecoEcal/EgammaCoreTools/interface/PositionCalc.h"
#include "DataFormats/CaloRecHit/interface/CaloCluster.h"


/*
UnifiedSCCollectionProducer:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Takes  as  input the cleaned  and the  uncleaned collection of SC
and  produces two collections of SC: one with the clean SC, but flagged
such that with the algoID value one can identify the SC that are also
in the unclean collection and a collection with the unclean only SC.
This collection has the algoID enumeration of the SC altered
such that:
flags = 0   (cleanedOnly)     cluster is only in the cleaned collection
flags = 100 (common)          cluster is common in both collections
flags = 200 (uncleanedOnly)   cluster is only in the uncleaned collection

In that way the user can get hold of objects from the
-  cleaned   collection only if they choose flags <  200
-  uncleaned collection only if they choose flags >= 100

18 Aug 2010
Nikolaos Rompotis and Chris Seez  - Imperial College London
many thanks to David Wardrope, Shahram Rahatlou and Federico Ferri
*/


UnifiedSCCollectionProducer::UnifiedSCCollectionProducer(const edm::ParameterSet& ps)
{

        // get the parameters
        // the cleaned collection:
        cleanBcCollection_ = ps.getParameter<edm::InputTag>("cleanBcCollection");
        cleanScCollection_ = ps.getParameter<edm::InputTag>("cleanScCollection");
        // the uncleaned collection
        uncleanBcCollection_ = ps.getParameter<edm::InputTag>("uncleanBcCollection");
        uncleanScCollection_ = ps.getParameter<edm::InputTag>("uncleanScCollection");
        // the names of the products to be produced:
        //
        // the clean collection: this is as it was before, but labeled
        bcCollection_ = ps.getParameter<std::string>("bcCollection");
        scCollection_ = ps.getParameter<std::string>("scCollection");
        // the unclean only collection: SC unique to the unclean collection
        bcCollectionUncleanOnly_ = ps.getParameter<std::string>("bcCollectionUncleanOnly");
        scCollectionUncleanOnly_ = ps.getParameter<std::string>("scCollectionUncleanOnly");
        // the products:
        produces< reco::BasicClusterCollection >(bcCollection_);
        produces< reco::SuperClusterCollection >(scCollection_);
        produces< reco::BasicClusterCollection >(bcCollectionUncleanOnly_);
        produces< reco::SuperClusterCollection >(scCollectionUncleanOnly_);

}


UnifiedSCCollectionProducer::~UnifiedSCCollectionProducer() {;}


void UnifiedSCCollectionProducer::produce(edm::Event& evt, 
                                          const edm::EventSetup& es)
{

  edm::LogInfo("UnifiedSC")<< ">>>>> Entering UnifiedSCCollectionProducer <<<<<";
  // get the input collections
  // __________________________________________________________________________
  //
  // cluster collections:
  edm::Handle<reco::BasicClusterCollection> pCleanBC;
  edm::Handle<reco::SuperClusterCollection> pCleanSC;
  //
  edm::Handle<reco::BasicClusterCollection> pUncleanBC;
  edm::Handle<reco::SuperClusterCollection> pUncleanSC;
  
  evt.getByLabel(cleanScCollection_, pCleanSC);
  if (!(pCleanSC.isValid())) 
    {
  
      edm::LogError("MissingInput") << "could not handle clean super clusters";
      return;
    }
  
        evt.getByLabel(uncleanScCollection_, pUncleanSC);
        if (!(pUncleanSC.isValid())) 
        {

          edm::LogError("MissingInput")<< "could not handle unclean super clusters!" ;
          return;
        }

        // the collections to be produced ___________________________________________
        reco::BasicClusterCollection basicClusters;
        reco::SuperClusterCollection superClusters;
        //
        reco::BasicClusterCollection basicClustersUncleanOnly;
        reco::SuperClusterCollection superClustersUncleanOnly;
        //
        // run over the uncleaned SC and check how many of them are matched to 
        // the cleaned ones
        // if you find a matched one, then keep the info that it is matched 
        //    along with which clean SC was matched + its basic clusters
        // if you find an unmatched one, keep the info and store its basic clusters
        //
        // 
        int uncleanSize = pUncleanSC->size();
        int cleanSize =   pCleanSC->size();
        
        LogDebug("UnifiedSC") << "Size of Clean Collection: " << cleanSize 
                        << ", uncleanSize: " << uncleanSize;


        // keep the indices
        std::vector<int> inUncleanOnlyInd;      // counting the unclean
        std::vector<int> inCleanInd;            // counting the unclean
        std::vector<int> inCleanOnlyInd;        // counting the clean
        std::vector<DetId> scUncleanSeedDetId;  // counting the unclean
        std::vector<DetId> scCleanSeedDetId;    // counting the clean
        // ontains the index of the SC that owns that BS
        // first basic cluster index, second: 0 for unclean and 1 for clean
        std::vector< std::pair<int, int> > basicClusterOwner; 
        std::vector< std::pair<int, int> > basicClusterOwnerUncleanOnly; 
        // if this basic cluster is a seed it is 1
        std::vector<int> uncleanBasicClusterIsSeed;

        // loop over unclean SC _____________________________________________________
        for (int isc =0; isc< uncleanSize; ++isc) {
                reco::SuperClusterRef unscRef( pUncleanSC, isc);    
                const std::vector< std::pair<DetId, float> > & uhits = unscRef->hitsAndFractions();
                int uhitsSize = uhits.size();
                bool foundTheSame = false;
                for (int jsc=0; jsc < cleanSize; ++jsc) { // loop over the cleaned SC
                        reco::SuperClusterRef cscRef( pCleanSC, jsc );
                        const std::vector<std::pair<DetId,float> > & chits = cscRef->hitsAndFractions();
                        int chitsSize =  chits.size();
                        foundTheSame = false;
                        if (unscRef->seed()->seed()==cscRef->seed()->seed() && chitsSize == uhitsSize) { 
                                // if the clusters are exactly the same then because the clustering
                                // algorithm works in a deterministic way, the order of the rechits
                                // will be the same
                                for (int i=0; i< chitsSize; ++i) {
                                        if (uhits[i].first != chits[i].first ) { break;}
                                }
                                foundTheSame = true;
                        }
                        if (foundTheSame) { // ok you have found it:
                                // this supercluster belongs to both collections
                                inUncleanOnlyInd.push_back(0);
                                inCleanInd.push_back(jsc); // keeps the index of the clean SC
                                scUncleanSeedDetId.push_back(unscRef->seed()->seed());
                                //
                                // keep its basic clusters:
                                for (reco::CaloCluster_iterator bciter = unscRef->clustersBegin(); bciter != unscRef->clustersEnd(); ++bciter) {
                                        // the basic clusters
                                        basicClusters.push_back(**bciter);
                                        // index of the unclean SC
                                        basicClusterOwner.push_back( std::make_pair(isc,0) ); 
                                } 
                                break; // break the loop over unclean sc
                        }
                }
                if (not foundTheSame) { // this SC is only in the unclean collection
                        // mark it as unique in the uncleaned
                        inUncleanOnlyInd.push_back(1);
                        scUncleanSeedDetId.push_back(unscRef->seed()->seed());
                        // keep all its basic clusters
                        for (reco::CaloCluster_iterator bciter = unscRef->clustersBegin(); bciter != unscRef->clustersEnd(); ++bciter) {
                                // the basic clusters
                                basicClustersUncleanOnly.push_back(**bciter);
                                basicClusterOwnerUncleanOnly.push_back( std::make_pair(isc,0) );
                        }
                }
        } // loop over the unclean SC _______________________________________________
        //
        int inCleanSize = inCleanInd.size();
        //
        // loop over the clean SC, check that are not in common with the unclean
        // ones and then store their SC as before ___________________________________
        for (int jsc =0; jsc< cleanSize; ++jsc) {
                // check whether this index is already in the common collection
                bool takenAlready = false;
                for (int j=0; j< inCleanSize; ++j) {
                        if (jsc == inCleanInd[j]) { takenAlready = true ;break;}
                }
                if (takenAlready) {
                        inCleanOnlyInd.push_back(0);
                        scCleanSeedDetId.push_back(DetId(0));
                        continue;
                }
                inCleanOnlyInd.push_back(1);
                reco::SuperClusterRef cscRef( pCleanSC, jsc );
                scCleanSeedDetId.push_back(cscRef->seed()->seed());
                for (reco::CaloCluster_iterator bciter = cscRef->clustersBegin(); bciter != cscRef->clustersEnd(); ++bciter) {
                        // the basic clusters
                        basicClusters.push_back(**bciter);
                        basicClusterOwner.push_back( std::make_pair(jsc,1) );
                }
        } // end loop over clean SC _________________________________________________
        //
        //
        // at this point we have the basic cluster collection ready
        // 
        int bcSize = (int) basicClusters.size();
        int bcSizeUncleanOnly = (int) basicClustersUncleanOnly.size();

        LogDebug("UnifiedSC") << "Found cleaned SC: " << cleanSize 
                              <<  " uncleaned SC: "   << uncleanSize ;
        //
        // export the clusters to the event from the clean clusters
        std::auto_ptr< reco::BasicClusterCollection> 
                basicClusters_p(new reco::BasicClusterCollection);
        basicClusters_p->assign(basicClusters.begin(), basicClusters.end());
        edm::OrphanHandle<reco::BasicClusterCollection> bccHandle =  
                evt.put(basicClusters_p, bcCollection_);
        if (!(bccHandle.isValid())) {
              
          edm::LogWarning("MissingInput")<< "could not handle the new BasicClusters!";
          return;
        }
        reco::BasicClusterCollection basicClustersProd = *bccHandle;

        LogDebug("UnifiedSC")<< "Got the BasicClusters from the event again" ;
        //
        // export the clusters to the event: from the unclean only clusters
        std::auto_ptr< reco::BasicClusterCollection> 
                basicClustersUncleanOnly_p(new reco::BasicClusterCollection);
        basicClustersUncleanOnly_p->assign(basicClustersUncleanOnly.begin(), 
                                           basicClustersUncleanOnly.end());
        edm::OrphanHandle<reco::BasicClusterCollection> bccHandleUncleanOnly =  
                evt.put(basicClustersUncleanOnly_p, bcCollectionUncleanOnly_);
        if (!(bccHandleUncleanOnly.isValid())) {

          edm::LogWarning("MissingInput")<< "could not handle the new BasicClusters (Unclean Only)!" ;
          return;
        }
        reco::BasicClusterCollection basicClustersUncleanOnlyProd = *bccHandleUncleanOnly;
        LogDebug("UnifiedSC")<< "Got the BasicClusters from the event again  (Unclean Only)" ;
        //

        // now we can build the SC collection
        //
        // start again from the unclean collection
        // all the unclean SC will become members of the new collection
        // with different algoIDs ___________________________________________________
        for (int isc=0; isc< uncleanSize; ++isc) {
                reco::CaloClusterPtrVector clusterPtrVector;
                // the seed is the basic cluster with the highest energy
                reco::CaloClusterPtr seed; 
                if (inUncleanOnlyInd[isc] == 1) { // unclean SC Unique in Unclean
                        for (int jbc=0; jbc< bcSizeUncleanOnly; ++jbc) {
                                std::pair<int, int> theBcOwner = basicClusterOwnerUncleanOnly[jbc];
                                if (theBcOwner.first == isc && theBcOwner.second == 0) {
                                        reco::CaloClusterPtr currentClu=reco::CaloClusterPtr(bccHandleUncleanOnly,jbc);
                                        clusterPtrVector.push_back(currentClu);
                                        if (scUncleanSeedDetId[isc] == currentClu->seed()) {
                                                seed = currentClu;
                                        }
                                }
                        }

                }
                else { // unclean SC common in clean and unclean
                        for (int jbc=0; jbc< bcSize; ++jbc) {
                                std::pair<int, int> theBcOwner = basicClusterOwner[jbc];
                                if (theBcOwner.first == isc && theBcOwner.second == 0) {
                                        reco::CaloClusterPtr currentClu=reco::CaloClusterPtr(bccHandle,jbc);
                                        clusterPtrVector.push_back(currentClu);
                                        if (scUncleanSeedDetId[isc] == currentClu->seed()) {
                                                seed = currentClu;
                                        }
                                }
                        }
                }
                //std::cout << "before getting the uncl" << std::endl;
                reco::SuperClusterRef unscRef( pUncleanSC, isc ); 
                reco::SuperCluster newSC(unscRef->energy(), unscRef->position(), 
                                         seed, clusterPtrVector );
                // now set the algoID for this SC again
                if (inUncleanOnlyInd[isc] == 1) {
                        // set up the quality to unclean only .............
                        newSC.setFlags(reco::CaloCluster::uncleanOnly);
                        superClustersUncleanOnly.push_back(newSC);
                }
                else {
                        // set up the quality to common  .............
                        newSC.setFlags(reco::CaloCluster::common);
                        superClusters.push_back(newSC);
                }
                // now you can store your SC

        } // end loop over unclean SC _______________________________________________
        //  flags numbering scheme
        //  flags =   0 = cleanedOnly     cluster is only in the cleaned collection
        //  flags = 100 = common          cluster is common in both collections
        //  flags = 200 = uncleanedOnly   cluster is only in the uncleaned collection

        // now loop over the clean SC and do the same but now you have to avoid the
        // the duplicated ones ______________________________________________________
        for (int jsc=0; jsc< cleanSize; ++jsc) {
                //std::cout << "working in cl #" << jsc << std::endl;
                // check that the SC is not in the unclean collection
                if (inCleanOnlyInd[jsc] == 0) continue;
                reco::CaloClusterPtrVector clusterPtrVector;
                // the seed is the basic cluster with the highest energy
                reco::CaloClusterPtr seed; 
                for (int jbc=0; jbc< bcSize; ++jbc) {
                        std::pair<int, int> theBcOwner = basicClusterOwner[jbc];
                        if (theBcOwner.first == jsc && theBcOwner.second == 1) {
                                reco::CaloClusterPtr currentClu=reco::CaloClusterPtr(bccHandle,jbc);
                                clusterPtrVector.push_back(currentClu);
                                if (scCleanSeedDetId[jsc] == currentClu->seed()) {
                                        seed = currentClu;
                                }
                        }
                }
                reco::SuperClusterRef cscRef( pCleanSC, jsc ); 
                reco::SuperCluster newSC(cscRef->energy(), cscRef->position(),
                                         seed, clusterPtrVector );
                newSC.setFlags(reco::CaloCluster::cleanOnly);

                // add it to the collection:
                superClusters.push_back(newSC);

        } // end loop over clean SC _________________________________________________


        LogDebug("UnifiedSC")<< "New SC collection was created";

        std::auto_ptr< reco::SuperClusterCollection> 
                superClusters_p(new reco::SuperClusterCollection);
        superClusters_p->assign(superClusters.begin(), superClusters.end());

        evt.put(superClusters_p, scCollection_);
        
        LogDebug("UnifiedSC") << "Clusters (Basic/Super) added to the Event! :-)";

        std::auto_ptr< reco::SuperClusterCollection> 
                superClustersUncleanOnly_p(new reco::SuperClusterCollection);
        superClustersUncleanOnly_p->assign(superClustersUncleanOnly.begin(), 
                                           superClustersUncleanOnly.end());

        evt.put(superClustersUncleanOnly_p, scCollectionUncleanOnly_);

        // ----- debugging ----------
        // print the new collection SC quantities

        // print out the clean collection SC
        LogDebug("UnifiedSC") << "Clean Collection SC ";
        for (int i=0; i < cleanSize; ++i) {
          reco::SuperClusterRef cscRef( pCleanSC, i );
          LogDebug("UnifiedSC") << " >>> clean    #" << i << "; Energy: " << cscRef->energy()
                                << " eta: " << cscRef->eta() 
                                << " sc seed detid: " << cscRef->seed()->seed().rawId()
                                << std::endl;
                }
                // the unclean SC
                LogDebug("UnifiedSC") << "Unclean Collection SC ";
                for (int i=0; i < uncleanSize; ++i) {
                        reco::SuperClusterRef uscRef( pUncleanSC, i );
                        LogDebug("UnifiedSC") << " >>> unclean  #" << i << "; Energy: " << uscRef->energy()
                                << " eta: " << uscRef->eta() 
                                << " sc seed detid: " << uscRef->seed()->seed().rawId();
                }
                // the new collection
                LogDebug("UnifiedSC")<< "The new SC clean collection with size "<< superClusters.size()  << std::endl;

                int new_unclean = 0, new_clean=0;
                for (int i=0; i < (int) superClusters.size(); ++i) {
                        const reco::SuperCluster & nsc = superClusters[i];
                        LogDebug("UnifiedSC") << "SC was got" << std::endl
                                << " ---> energy: " << nsc.energy() << std::endl
                                << " ---> eta: " << nsc.eta() << std::endl
                                << " ---> inClean: " << nsc.isInClean() << std::endl
                                << " ---> id: " << nsc.seed()->seed().rawId() << std::endl
                                << " >>> newSC    #" << i << "; Energy: " << nsc.energy()
                                << " eta: " << nsc.eta()  << " isClean=" 
                                << nsc.isInClean() << " isUnclean=" << nsc.isInUnclean()
                                << " sc seed detid: " << nsc.seed()->seed().rawId();

                        if (nsc.isInUnclean()) ++new_unclean;
                        if (nsc.isInClean()) ++new_clean;
                }
                LogDebug("UnifiedSC")<< "The new SC unclean only collection with size "<< superClustersUncleanOnly.size();
                for (int i=0; i < (int) superClustersUncleanOnly.size(); ++i) {
                        const reco::SuperCluster nsc = superClustersUncleanOnly[i];
                        LogDebug ("UnifiedSC") << " >>> newSC    #" << i << "; Energy: " << nsc.energy()
                                << " eta: " << nsc.eta()  << " isClean=" 
                                << nsc.isInClean() << " isUnclean=" << nsc.isInUnclean()
                                << " sc seed detid: " << nsc.seed()->seed().rawId();
                        if (nsc.isInUnclean()) ++new_unclean;
                        if (nsc.isInClean()) ++new_clean;      
                }
                if ( (new_unclean != uncleanSize) || (new_clean != cleanSize) ) {
                        LogDebug("UnifiedSC") << ">>>>!!!!!! MISMATCH: new unclean/ old unclean= " 
                                << new_unclean << " / " << uncleanSize 
                                << ", new clean/ old clean" << new_clean << " / " << cleanSize;
                }
        
}