/data/refman/pasoursint/CMSSW_6_1_2_SLHC4_patch1/src/Alignment/OfflineValidation/plugins/TrackerOfflineValidationSummary.cc

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// -*- C++ -*-
//
// Package:    TrackerOfflineValidationSummary
// Class:      TrackerOfflineValidationSummary
// 
//
// Original Author:  Johannes Hauk
//         Created:  Sat Aug 22 10:31:34 CEST 2009
// $Id: TrackerOfflineValidationSummary.cc,v 1.7 2012/06/30 09:09:47 eulisse Exp $
//
//


// system include files
#include <memory>

// user include files
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/EDAnalyzer.h"

#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"

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


#include "FWCore/Framework/interface/ESHandle.h"
#include "Geometry/TrackerGeometryBuilder/interface/TrackerGeometry.h"
#include "Geometry/Records/interface/TrackerDigiGeometryRecord.h"
#include "Alignment/TrackerAlignment/interface/AlignableTracker.h"
#include "Alignment/CommonAlignment/interface/AlignableObjectId.h"


#include "TTree.h"
//#include "Alignment/OfflineValidation/interface/TrackerValidationVariables.h"
#include "Alignment/OfflineValidation/interface/TkOffTreeVariables.h"

#include "DataFormats/SiPixelDetId/interface/PixelSubdetector.h"
#include "DataFormats/SiPixelDetId/interface/PXBDetId.h"
#include "DataFormats/SiPixelDetId/interface/PXFDetId.h"
#include "DataFormats/SiStripDetId/interface/TECDetId.h"
#include "DataFormats/SiStripDetId/interface/TIBDetId.h"
#include "DataFormats/SiStripDetId/interface/TIDDetId.h"
#include "DataFormats/SiStripDetId/interface/TOBDetId.h"
#include "DataFormats/GeometrySurface/interface/Surface.h"
#include "Geometry/CommonDetUnit/interface/GeomDet.h"
#include "DataFormats/Math/interface/deltaPhi.h"
#include "TH1.h"
#include "TMath.h"

#include "DQMServices/Core/interface/DQMStore.h"
#include "DQMServices/Core/interface/MonitorElement.h"
#include "FWCore/ServiceRegistry/interface/Service.h"

//
// class decleration
//

class TrackerOfflineValidationSummary : public edm::EDAnalyzer {
   public:
      explicit TrackerOfflineValidationSummary(const edm::ParameterSet&);
      ~TrackerOfflineValidationSummary();


   private:
      
      struct ModuleHistos{
        ModuleHistos() :  ResHisto(), NormResHisto(), ResXprimeHisto(), NormResXprimeHisto(), 
                          ResYprimeHisto(), NormResYprimeHisto() {} 
        TH1* ResHisto;
        TH1* NormResHisto;
        TH1* ResXprimeHisto;
        TH1* NormResXprimeHisto;
        TH1* ResYprimeHisto;
        TH1* NormResYprimeHisto;
      };
      
      struct HarvestingHistos{
        HarvestingHistos() : DmrXprime(), DmrYprime() {}
        TH1* DmrXprime;
        TH1* DmrYprime;
      };
      
      struct HarvestingHierarchy{
        HarvestingHierarchy() {}
        HarvestingHierarchy(const std::string& name, const std::string& component, const std::vector<unsigned int>& entries) : hierarchyName(name), componentName(component), treeEntries(entries) {}
        // Needed for naming of histogram according to residual histograms
        std::string hierarchyName;
        // "Pixel" or "Strip"
        std::string componentName;
        // Modules belonging to selected hierarchy
        std::vector<unsigned int> treeEntries;
        HarvestingHistos harvestingHistos;
      };
      
      virtual void analyze(const edm::Event& evt, const edm::EventSetup&);
      virtual void endJob() ;
      
      void fillTree(TTree& tree, std::map<int, TrackerOfflineValidationSummary::ModuleHistos>& moduleHist, 
                TkOffTreeVariables& treeMem, const TrackerGeometry& tkgeom, std::map<std::string,std::string>& substructureName);
      
      std::pair<float,float> fitResiduals(TH1* hist)const;
      float getMedian(const TH1* hist)const;
      
      const std::string associateModuleHistsWithTree(const TkOffTreeVariables& treeMem, TrackerOfflineValidationSummary::ModuleHistos& moduleHists, std::map<std::string,std::string>& substructureName);
      
      void collateHarvestingHists(TTree& tree);
      void applyHarvestingHierarchy(TTree& treeMem);
      void bookHarvestingHists();
      void getBinning(const std::string& binningPSetName, int& nBinsX, double& lowerBoundX, double& upperBoundX)const;
      void fillHarvestingHists(TTree& tree);
      
      // ----------member data ---------------------------
      
      const edm::ParameterSet parSet_;
      edm::ESHandle<TrackerGeometry> tkGeom_;
      
      // parameters from cfg to steer
      const std::string moduleDirectory_;
      const bool useFit_;
      
      DQMStore* dbe_;
      
      bool moduleMapsInitialized;
      
      std::map<int,TrackerOfflineValidationSummary::ModuleHistos> mPxbResiduals_;
      std::map<int,TrackerOfflineValidationSummary::ModuleHistos> mPxeResiduals_;
      std::map<int,TrackerOfflineValidationSummary::ModuleHistos> mTibResiduals_;
      std::map<int,TrackerOfflineValidationSummary::ModuleHistos> mTidResiduals_;
      std::map<int,TrackerOfflineValidationSummary::ModuleHistos> mTobResiduals_;
      std::map<int,TrackerOfflineValidationSummary::ModuleHistos> mTecResiduals_;
      
      std::vector<HarvestingHierarchy> vHarvestingHierarchy_;
};

//
// constants, enums and typedefs
//

//
// static data member definitions
//

//
// constructors and destructor
//
TrackerOfflineValidationSummary::TrackerOfflineValidationSummary(const edm::ParameterSet& iConfig):
   parSet_(iConfig), moduleDirectory_(parSet_.getParameter<std::string>("moduleDirectoryInOutput")),
   useFit_(parSet_.getParameter<bool>("useFit")), dbe_(0), moduleMapsInitialized(false)
{
  //now do what ever initialization is needed
  dbe_ = edm::Service<DQMStore>().operator->();
}


TrackerOfflineValidationSummary::~TrackerOfflineValidationSummary()
{
 
   // do anything here that needs to be done at desctruction time
   // (e.g. close files, deallocate resources etc.)

}


//
// member functions
//

// ------------ method called to for each event  ------------
void
TrackerOfflineValidationSummary::analyze(const edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  // Access of EventSetup is needed to get the list of silicon-modules and their IDs
  // Since they do not change, it is accessed only once
  if(moduleMapsInitialized)return;
  iSetup.get<TrackerDigiGeometryRecord>().get( tkGeom_ );
  const TrackerGeometry* bareTkGeomPtr = &(*tkGeom_);
  const TrackingGeometry::DetIdContainer& detIdContainer = bareTkGeomPtr->detIds();
  std::vector<DetId>::const_iterator iDet;
  for(iDet = detIdContainer.begin(); iDet != detIdContainer.end(); ++iDet){
    const DetId& detId = *iDet;
    const uint32_t rawId = detId.rawId();
    const unsigned int subdetId = detId.subdetId();
    if     (subdetId == PixelSubdetector::PixelBarrel) mPxbResiduals_[rawId];
    else if(subdetId == PixelSubdetector::PixelEndcap) mPxeResiduals_[rawId];
    else if(subdetId  == StripSubdetector::TIB) mTibResiduals_[rawId];
    else if(subdetId  == StripSubdetector::TID) mTidResiduals_[rawId];
    else if(subdetId  == StripSubdetector::TOB) mTobResiduals_[rawId];
    else if(subdetId  == StripSubdetector::TEC) mTecResiduals_[rawId];
    else {
      throw cms::Exception("Geometry Error")
        << "[TrackerOfflineValidationSummary] Error, tried to get reference for non-tracker subdet " << subdetId 
        << " from detector " << detId.det();
    }
  }
  moduleMapsInitialized = true;
}


// ------------ method called once each job just after ending the event loop  ------------
void 
TrackerOfflineValidationSummary::endJob()
{
  AlignableTracker aliTracker(&(*tkGeom_));
  
  TTree* tree = new TTree("TkOffVal","TkOffVal");
  
  TkOffTreeVariables *treeMemPtr = new TkOffTreeVariables;
  // We create branches for all members of 'TkOffTreeVariables' (even if not needed).
  // This works because we have a dictionary for 'TkOffTreeVariables'
  // (see src/classes_def.xml and src/classes.h):
  tree->Branch("TkOffTreeVariables", &treeMemPtr); // address of pointer!
  // second branch needed for assigning names and titles to harvesting histograms consistent to others
  std::map<std::string,std::string> *substructureName = new std::map<std::string,std::string>;
  tree->Branch("SubstructureName", &substructureName, 32000, 00);  // SplitLevel must be set to zero
  
  
  this->fillTree(*tree, mPxbResiduals_, *treeMemPtr, *tkGeom_, *substructureName);
  this->fillTree(*tree, mPxeResiduals_, *treeMemPtr, *tkGeom_, *substructureName);
  this->fillTree(*tree, mTibResiduals_, *treeMemPtr, *tkGeom_, *substructureName);
  this->fillTree(*tree, mTidResiduals_, *treeMemPtr, *tkGeom_, *substructureName);
  this->fillTree(*tree, mTobResiduals_, *treeMemPtr, *tkGeom_, *substructureName);
  this->fillTree(*tree, mTecResiduals_, *treeMemPtr, *tkGeom_, *substructureName);
  
  //dbe_->showDirStructure();
  //dbe_->save("dqmOut.root");
  
  // Method for filling histograms which show summarized values (mean, rms, median ...)
  // of the module-based histograms from TrackerOfflineValidation
  this->collateHarvestingHists(*tree);
  
  delete tree; tree = 0;
  delete treeMemPtr; treeMemPtr = 0;
  delete substructureName; substructureName = 0;
}


void 
TrackerOfflineValidationSummary::fillTree(TTree& tree,
                                   std::map<int, TrackerOfflineValidationSummary::ModuleHistos>& moduleHist,
                                   TkOffTreeVariables& treeMem, const TrackerGeometry& tkgeom, std::map<std::string,std::string>& substructureName)
{
  for(std::map<int, TrackerOfflineValidationSummary::ModuleHistos>::iterator it = moduleHist.begin(), 
        itEnd= moduleHist.end(); it != itEnd;++it ) { 
    treeMem.clear(); // make empty/default
    
    //variables concerning the tracker components/hierarchy levels
    const DetId detId = it->first;
    treeMem.moduleId = detId;
    treeMem.subDetId = detId.subdetId();

    if(treeMem.subDetId == PixelSubdetector::PixelBarrel){
      PXBDetId pxbId(detId);
      unsigned int whichHalfBarrel(1), rawId(detId.rawId());  //DetId does not know about halfBarrels is PXB ...
      if( (rawId>=302056964 && rawId<302059300) || (rawId>=302123268 && rawId<302127140) || (rawId>=302189572 && rawId<302194980) )whichHalfBarrel=2;
      treeMem.layer = pxbId.layer();
      treeMem.half = whichHalfBarrel; 
      treeMem.rod = pxbId.ladder();     // ... so, ladder is not per halfBarrel-Layer, but per barrel-layer! Needs complicated calculation in associateModuleHistsWithTree()
      treeMem.module = pxbId.module();
    } else if(treeMem.subDetId == PixelSubdetector::PixelEndcap){
      PXFDetId pxfId(detId); 
      unsigned int whichHalfCylinder(1), rawId(detId.rawId());  //DetId does not kmow about halfCylinders in PXF
      if( (rawId>=352394500 && rawId<352406032) || (rawId>=352460036 && rawId<352471568) || (rawId>=344005892 && rawId<344017424) || (rawId>=344071428 && rawId<344082960) )whichHalfCylinder=2;
      treeMem.layer = pxfId.disk(); 
      treeMem.side = pxfId.side();
      treeMem.half = whichHalfCylinder;
      treeMem.blade = pxfId.blade(); 
      treeMem.panel = pxfId.panel();
      treeMem.module = pxfId.module();
    } else if(treeMem.subDetId == StripSubdetector::TIB){
      TIBDetId tibId(detId); 
      unsigned int whichHalfShell(1), rawId(detId.rawId());  //DetId does not kmow about halfShells in TIB
       if ( (rawId>=369120484 && rawId<369120688) || (rawId>=369121540 && rawId<369121776) || (rawId>=369136932 && rawId<369137200) || (rawId>=369137988 && rawId<369138288) ||
            (rawId>=369153396 && rawId<369153744) || (rawId>=369154436 && rawId<369154800) || (rawId>=369169844 && rawId<369170256) || (rawId>=369170900 && rawId<369171344) ||
            (rawId>=369124580 && rawId<369124784) || (rawId>=369125636 && rawId<369125872) || (rawId>=369141028 && rawId<369141296) || (rawId>=369142084 && rawId<369142384) ||
            (rawId>=369157492 && rawId<369157840) || (rawId>=369158532 && rawId<369158896) || (rawId>=369173940 && rawId<369174352) || (rawId>=369174996 && rawId<369175440) ) whichHalfShell=2;
      treeMem.layer = tibId.layer(); 
      treeMem.side = tibId.string()[0];
      treeMem.half = whichHalfShell;
      treeMem.rod = tibId.string()[2]; 
      treeMem.outerInner = tibId.string()[1]; 
      treeMem.module = tibId.module();
      treeMem.isStereo = tibId.stereo();
      treeMem.isDoubleSide = tibId.isDoubleSide();
    } else if(treeMem.subDetId == StripSubdetector::TID){
      TIDDetId tidId(detId); 
      treeMem.layer = tidId.wheel(); 
      treeMem.side = tidId.side();
      treeMem.ring = tidId.ring(); 
      treeMem.outerInner = tidId.module()[0]; 
      treeMem.module = tidId.module()[1];
      treeMem.isStereo = tidId.stereo();
      treeMem.isDoubleSide = tidId.isDoubleSide();
    } else if(treeMem.subDetId == StripSubdetector::TOB){
      TOBDetId tobId(detId); 
      treeMem.layer = tobId.layer(); 
      treeMem.side = tobId.rod()[0];
      treeMem.rod = tobId.rod()[1]; 
      treeMem.module = tobId.module();
      treeMem.isStereo = tobId.stereo();
      treeMem.isDoubleSide = tobId.isDoubleSide();
    } else if(treeMem.subDetId == StripSubdetector::TEC) {
      TECDetId tecId(detId); 
      treeMem.layer = tecId.wheel(); 
      treeMem.side  = tecId.side();
      treeMem.ring  = tecId.ring(); 
      treeMem.petal = tecId.petal()[1]; 
      treeMem.outerInner = tecId.petal()[0];
      treeMem.module = tecId.module();
      treeMem.isStereo = tecId.stereo();
      treeMem.isDoubleSide = tecId.isDoubleSide();
    }
    
    //variables concerning the tracker geometry
    
    const Surface::PositionType &gPModule = tkgeom.idToDet(detId)->position();
    treeMem.posPhi = gPModule.phi();
    treeMem.posEta = gPModule.eta();
    treeMem.posR   = gPModule.perp();
    treeMem.posX   = gPModule.x();
    treeMem.posY   = gPModule.y();
    treeMem.posZ   = gPModule.z();
 
    const Surface& surface =  tkgeom.idToDet(detId)->surface();
    
    //global Orientation of local coordinate system of dets/detUnits   
    LocalPoint  lUDirection(1.,0.,0.), lVDirection(0.,1.,0.), lWDirection(0.,0.,1.);
    GlobalPoint gUDirection = surface.toGlobal(lUDirection),
                gVDirection = surface.toGlobal(lVDirection),
                gWDirection = surface.toGlobal(lWDirection);
    double dR(999.), dPhi(999.), dZ(999.);
    if(treeMem.subDetId==PixelSubdetector::PixelBarrel || treeMem.subDetId==StripSubdetector::TIB || treeMem.subDetId==StripSubdetector::TOB){
      dR = gWDirection.perp() - gPModule.perp();
      dPhi = deltaPhi(gUDirection.phi(),gPModule.phi());
      dZ = gVDirection.z() - gPModule.z();
      if(dZ>=0.)treeMem.rOrZDirection = 1; else treeMem.rOrZDirection = -1;
    }else if(treeMem.subDetId==PixelSubdetector::PixelEndcap){
      dR = gUDirection.perp() - gPModule.perp();
      dPhi = deltaPhi(gVDirection.phi(),gPModule.phi());
      dZ = gWDirection.z() - gPModule.z();
      if(dR>=0.)treeMem.rOrZDirection = 1; else treeMem.rOrZDirection = -1;
    }else if(treeMem.subDetId==StripSubdetector::TID || treeMem.subDetId==StripSubdetector::TEC){
      dR = gVDirection.perp() - gPModule.perp();
      dPhi = deltaPhi(gUDirection.phi(),gPModule.phi());
      dZ = gWDirection.z() - gPModule.z();
      if(dR>=0.)treeMem.rOrZDirection = 1; else treeMem.rOrZDirection = -1;
    }
    if(dR>=0.)treeMem.rDirection = 1; else treeMem.rDirection = -1;
    if(dPhi>=0.)treeMem.phiDirection = 1; else treeMem.phiDirection = -1;
    if(dZ>=0.)treeMem.zDirection = 1; else treeMem.zDirection = -1;
    
    
    // Assign histos from first step (TrackerOfflineValidation) to the module's entry in the TTree for retrieving mean, rms, median ...
    const std::string histDir = associateModuleHistsWithTree(treeMem, it->second, substructureName);
    
    
    //mean and RMS values (extracted from histograms Xprime on module level)
    treeMem.entries = static_cast<UInt_t>(it->second.ResXprimeHisto->GetEntries());
    treeMem.meanX = it->second.ResXprimeHisto->GetMean();
    treeMem.rmsX  = it->second.ResXprimeHisto->GetRMS();
    //treeMem.sigmaX = Fwhm(it->second.ResXprimeHisto)/2.355;
    if (useFit_) {
      //call fit function which returns mean and sigma from the fit
      //for absolute residuals
      std::pair<float,float> fitResult1 = this->fitResiduals(it->second.ResXprimeHisto);
      treeMem.fitMeanX = fitResult1.first;
      treeMem.fitSigmaX = fitResult1.second;
      //for normalized residuals
      std::pair<float,float> fitResult2 = this->fitResiduals(it->second.NormResXprimeHisto);
      treeMem.fitMeanNormX = fitResult2.first;
      treeMem.fitSigmaNormX = fitResult2.second;
    }
    
    //get median for absolute residuals
    treeMem.medianX = this->getMedian(it->second.ResXprimeHisto);

    int numberOfBins=it->second.ResXprimeHisto->GetNbinsX();
    treeMem.numberOfUnderflows = it->second.ResXprimeHisto->GetBinContent(0);
    treeMem.numberOfOverflows = it->second.ResXprimeHisto->GetBinContent(numberOfBins+1);
    treeMem.numberOfOutliers =  it->second.ResXprimeHisto->GetBinContent(0)+it->second.ResXprimeHisto->GetBinContent(numberOfBins+1);
    //mean and RMS values (extracted from histograms(normalized Xprime on module level)
    treeMem.meanNormX = it->second.NormResXprimeHisto->GetMean();
    treeMem.rmsNormX = it->second.NormResXprimeHisto->GetRMS();

    double stats[20];
    it->second.NormResXprimeHisto->GetStats(stats);
    // GF  treeMem.chi2PerDofX = stats[3]/(stats[0]-1);
    if (stats[0]) treeMem.chi2PerDofX = stats[3]/stats[0];
    
    //treeMem.sigmaNormX = Fwhm(it->second.NormResXprimeHisto)/2.355;
    treeMem.histNameX = it->second.ResXprimeHisto->GetName();
    treeMem.histNameNormX = it->second.NormResXprimeHisto->GetName();
    

    // fill tree variables in local coordinates if set in cfg of TrackerOfllineValidation
    if(it->second.ResHisto && it->second.NormResHisto){ // if(lCoorHistOn_) {
      treeMem.meanLocalX = it->second.ResHisto->GetMean();
      treeMem.rmsLocalX = it->second.ResHisto->GetRMS();
      treeMem.meanNormLocalX = it->second.NormResHisto->GetMean();
      treeMem.rmsNormLocalX = it->second.NormResHisto->GetRMS();
      treeMem.histNameLocalX = it->second.ResHisto->GetName();
      treeMem.histNameNormLocalX = it->second.NormResHisto->GetName();
    }

    // mean and RMS values in local y (extracted from histograms Yprime on module level)
    // might exist in pixel only
    if (it->second.ResYprimeHisto) { //(stripYResiduals_){
      TH1 *h = it->second.ResYprimeHisto;
      treeMem.meanY = h->GetMean();
      treeMem.rmsY  = h->GetRMS();
      
      if (useFit_) { // fit function which returns mean and sigma from the fit
        std::pair<float,float> fitMeanSigma = this->fitResiduals(h);
        treeMem.fitMeanY  = fitMeanSigma.first;
        treeMem.fitSigmaY = fitMeanSigma.second;
      }
      
      //get median for absolute residuals
      treeMem.medianY = this->getMedian(h);

      treeMem.histNameY = h->GetName();
    }
    
    if (it->second.NormResYprimeHisto) {
      TH1 *h = it->second.NormResYprimeHisto;
      treeMem.meanNormY = h->GetMean();
      treeMem.rmsNormY  = h->GetRMS();
      h->GetStats(stats); // stats buffer defined above
      if (stats[0]) treeMem.chi2PerDofY = stats[3]/stats[0];

      if (useFit_) { // fit function which returns mean and sigma from the fit
        std::pair<float,float> fitMeanSigma = this->fitResiduals(h);
        treeMem.fitMeanNormY  = fitMeanSigma.first;
        treeMem.fitSigmaNormY = fitMeanSigma.second;
      }
      treeMem.histNameNormY = h->GetName();
    }
    
    // Delete module level hists if set in cfg
    const bool removeModuleLevelHists(parSet_.getParameter<bool>("removeModuleLevelHists"));
    if(removeModuleLevelHists){
      dbe_->setCurrentFolder("");
      if(it->second.ResHisto)          dbe_->removeElement(histDir + "/" + it->second.ResHisto->GetName());
      if(it->second.NormResHisto)      dbe_->removeElement(histDir + "/" + it->second.NormResHisto->GetName());
      if(it->second.ResXprimeHisto)    dbe_->removeElement(histDir + "/" + it->second.ResXprimeHisto->GetName());
      if(it->second.NormResXprimeHisto)dbe_->removeElement(histDir + "/" + it->second.NormResXprimeHisto->GetName());
      if(it->second.ResYprimeHisto)    dbe_->removeElement(histDir + "/" + it->second.ResYprimeHisto->GetName());
      if(it->second.NormResYprimeHisto)dbe_->removeElement(histDir + "/" + it->second.NormResYprimeHisto->GetName());
    }
    
    tree.Fill();
  }
}


const std::string
TrackerOfflineValidationSummary::associateModuleHistsWithTree(const TkOffTreeVariables& treeMem, TrackerOfflineValidationSummary::ModuleHistos& moduleHists, std::map<std::string,std::string>& substructureName){
   std::stringstream histDir, sSubdetName;
   std::string componentName;
   if(moduleDirectory_.length() != 0)histDir<<moduleDirectory_<<"/";
   std::string wheelOrLayer("_layer_");
   if(treeMem.subDetId == PixelSubdetector::PixelBarrel){
     unsigned int half(treeMem.half), layer(treeMem.layer), ladder(0);
     if(layer==1){
       if(half==2)ladder = treeMem.rod -5;
       else if(treeMem.rod>15)ladder = treeMem.rod -10;
       else ladder = treeMem.rod;
     }else if(layer==2){
       if(half==2)ladder = treeMem.rod -8;
       else if(treeMem.rod>24)ladder = treeMem.rod -16;
       else ladder = treeMem.rod;
     }else if(layer==3){
       if(half==2)ladder = treeMem.rod -11;
       else if(treeMem.rod>33)ladder = treeMem.rod -22;
       else ladder = treeMem.rod;
     }
     componentName = "Pixel";
     sSubdetName<<"TPBBarrel_1";
     histDir<<componentName<<"/"<<sSubdetName.str()<<"/TPBHalfBarrel_"<<treeMem.half<<"/TPBLayer_"<<treeMem.layer<<"/TPBLadder_"<<ladder;
   }else if(treeMem.subDetId == PixelSubdetector::PixelEndcap){
     unsigned int side(treeMem.side), half(treeMem.half), blade(0);
     if(side==1)side=3;
     if(half==2)blade = treeMem.blade -6;
     else if(treeMem.blade>18)blade = treeMem.blade -12;
     else blade = treeMem.blade;
     componentName = "Pixel";
     sSubdetName<<"TPEEndcap_"<<side;
     histDir<<componentName<<"/"<<sSubdetName.str()<<"/TPEHalfCylinder_"<<treeMem.half<<"/TPEHalfDisk_"<<treeMem.layer<<"/TPEBlade_"<<blade<<"/TPEPanel_"<<treeMem.panel;
     wheelOrLayer = "_wheel_";
   }else if(treeMem.subDetId == StripSubdetector::TIB){
     unsigned int half(treeMem.half), layer(treeMem.layer), surface(treeMem.outerInner), string(0);
     if(half==2){
       if(layer==1){
         if(surface==1)string = treeMem.rod -13;
         else if(surface==2)string = treeMem.rod -15;
       }
       if(layer==2){
         if(surface==1)string = treeMem.rod -17;
         else if(surface==2)string = treeMem.rod -19;
       }
       if(layer==3){
         if(surface==1)string = treeMem.rod -22;
         else if(surface==2)string = treeMem.rod -23;
       }
       if(layer==4){
         if(surface==1)string = treeMem.rod -26;
         else if(surface==2)string = treeMem.rod -28;
       }
     }
     else string = treeMem.rod;
     std::stringstream detString;
     if(treeMem.layer<3 && !treeMem.isDoubleSide)detString<<"/Det_"<<treeMem.module;
     else detString<<"";
     componentName = "Strip";
     sSubdetName<<"TIBBarrel_1";
     histDir<<componentName<<"/"<<sSubdetName.str()<<"/TIBHalfBarrel_"<<treeMem.side<<"/TIBLayer_"<<treeMem.layer<<"/TIBHalfShell_"<<treeMem.half<<"/TIBSurface_"<<treeMem.outerInner<<"/TIBString_"<<string<<detString.str();
   }else if(treeMem.subDetId == StripSubdetector::TID){
     unsigned int side(treeMem.side), outerInner(0);
     if(side==1)side=3;
     if(treeMem.outerInner==1)outerInner=2;
     else if(treeMem.outerInner==2)outerInner=1;
     std::stringstream detString;
     if(treeMem.ring<3 && !treeMem.isDoubleSide)detString<<"/Det_"<<treeMem.module;
     else detString<<"";
     componentName = "Strip";
     sSubdetName<<"TIDEndcap_"<<side;
     histDir<<componentName<<"/"<<sSubdetName.str()<<"/TIDDisk_"<<treeMem.layer<<"/TIDRing_"<<treeMem.ring<<"/TIDSide_"<<outerInner<<detString.str();
     wheelOrLayer = "_wheel_";
   }else if(treeMem.subDetId == StripSubdetector::TOB){
     std::stringstream detString;
     if(treeMem.layer<3 && !treeMem.isDoubleSide)detString<<"/Det_"<<treeMem.module;
     else detString<<"";
     componentName = "Strip";
     sSubdetName<<"TOBBarrel_4";
     histDir<<componentName<<"/"<<sSubdetName.str()<<"/TOBHalfBarrel_"<<treeMem.side<<"/TOBLayer_"<<treeMem.layer<<"/TOBRod_"<<treeMem.rod<<detString.str();
   }else if(treeMem.subDetId == StripSubdetector::TEC) {
     unsigned int side(0), outerInner(0), ring(0);
     if(treeMem.side==1)side=6;
     else if(treeMem.side==2)side=5;
     if(treeMem.outerInner==1)outerInner = 2;
     else if(treeMem.outerInner==2)outerInner=1;
     if(treeMem.layer>3 && treeMem.layer<7)ring = treeMem.ring -1;
     else if(treeMem.layer==7 || treeMem.layer==8)ring = treeMem.ring -2;
     else if(treeMem.layer==9)ring = treeMem.ring -3;
     else ring = treeMem.ring;
     std::stringstream detString;
     if((treeMem.ring<3 || treeMem.ring==5) && !treeMem.isDoubleSide)detString<<"/Det_"<<treeMem.module;
     else detString<<"";
     componentName = "Strip";
     sSubdetName<<"TECEndcap_"<<side;
     histDir<<componentName<<"/"<<sSubdetName.str()<<"/TECDisk_"<<treeMem.layer<<"/TECSide_"<<outerInner<<"/TECPetal_"<<treeMem.petal<<"/TECRing_"<<ring<<detString.str();
     wheelOrLayer = "_wheel_";
   }
   
   substructureName["component"] = componentName;
   substructureName["subdet"] = sSubdetName.str();
   
   std::stringstream histName;
   histName<<"residuals_subdet_"<<treeMem.subDetId<<wheelOrLayer<<treeMem.layer<<"_module_"<<treeMem.moduleId;
   
   std::string fullPath;
   fullPath = histDir.str()+"/h_xprime_"+histName.str();
   if(dbe_->get(fullPath)) moduleHists.ResXprimeHisto = dbe_->get(fullPath)->getTH1();
   else{edm::LogError("TrackerOfflineValidationSummary")<<"Problem with names in input file produced in TrackerOfflineValidation ...\n"
                                                        <<"This histogram should exist in every configuration, "
                                                        <<"but no histogram with name "<<fullPath<<" is found!";
     return "";
   }
   fullPath = histDir.str()+"/h_normxprime"+histName.str();
   if(dbe_->get(fullPath)) moduleHists.NormResXprimeHisto = dbe_->get(fullPath)->getTH1();
   fullPath = histDir.str()+"/h_yprime_"+histName.str();
   if(dbe_->get(fullPath)) moduleHists.ResYprimeHisto = dbe_->get(fullPath)->getTH1();
   fullPath = histDir.str()+"/h_normyprime"+histName.str();
   if(dbe_->get(fullPath)) moduleHists.NormResYprimeHisto = dbe_->get(fullPath)->getTH1();
   fullPath = histDir.str()+"/h_"+histName.str();
   if(dbe_->get(fullPath)) moduleHists.ResHisto = dbe_->get(fullPath)->getTH1();
   fullPath = histDir.str()+"/h_norm"+histName.str();
   if(dbe_->get(fullPath)) moduleHists.NormResHisto = dbe_->get(fullPath)->getTH1();
   
   return histDir.str();
}


std::pair<float,float> 
TrackerOfflineValidationSummary::fitResiduals(TH1* hist) const
{
  std::pair<float,float> fitResult(9999., 9999.);
  if (!hist || hist->GetEntries() < 20) return fitResult;

  float mean  = hist->GetMean();
  float sigma = hist->GetRMS();

  try { // for < CMSSW_2_2_0 since ROOT warnings from fit are converted to exceptions
    // Remove the try/catch for more recent CMSSW!
    // first fit: two RMS around mean
    TF1 func("tmp", "gaus", mean - 2.*sigma, mean + 2.*sigma); 
    if (0 == hist->Fit(&func,"QNR")) { // N: do not blow up file by storing fit!
      mean  = func.GetParameter(1);
      sigma = func.GetParameter(2);
      // second fit: three sigma of first fit around mean of first fit
      func.SetRange(mean - 3.*sigma, mean + 3.*sigma);
      // I: integral gives more correct results if binning is too wide
      // L: Likelihood can treat empty bins correctly (if hist not weighted...)
      if (0 == hist->Fit(&func, "Q0LR")) {
        if (hist->GetFunction(func.GetName())) { // Take care that it is later on drawn:
          hist->GetFunction(func.GetName())->ResetBit(TF1::kNotDraw);
        }
        fitResult.first = func.GetParameter(1);
        fitResult.second = func.GetParameter(2);
      }
    }
  } catch (cms::Exception const & e) {
    edm::LogWarning("Alignment") << "@SUB=TrackerOfflineValidation::fitResiduals"
                                 << "Caught this exception during ROOT fit: "
                                 << e.what();
  }
  return fitResult;
}


float 
TrackerOfflineValidationSummary::getMedian(const TH1 *histo) const
{
  float median = 999;
  const int nbins = histo->GetNbinsX();
 
  //extract median from histogram
  double *x = new double[nbins];
  double *y = new double[nbins];
  for (int j = 0; j < nbins; j++) {
    x[j] = histo->GetBinCenter(j+1);
    y[j] = histo->GetBinContent(j+1);
  }
  median = TMath::Median(nbins, x, y);
  
  delete[] x; x = 0;
  delete [] y; y = 0;  

  return median;
}


void
TrackerOfflineValidationSummary::collateHarvestingHists(TTree& tree)
{
  this->applyHarvestingHierarchy(tree);
  this->fillHarvestingHists(tree);
}


void
TrackerOfflineValidationSummary::applyHarvestingHierarchy(TTree& tree)
{
  TkOffTreeVariables *treeMemPtr = 0;
  std::map<std::string,std::string> *substructureName = 0;
  tree.SetBranchAddress("TkOffTreeVariables", &treeMemPtr);
  tree.SetBranchAddress("SubstructureName", &substructureName);
  
  // Loop over modules to select accumulation criteria for harvesting plots
  for(unsigned int iSubdet = 1; iSubdet<7; ++iSubdet){
    std::string hierarchyName("");
    std::string componentName("");
    std::vector<unsigned int> treeEntries;
    for(unsigned int iSide = 1; iSide<3; ++iSide){
      // Set up only one collection for Barrels, not separated for side
      if(iSide==1 && (iSubdet==PixelSubdetector::PixelBarrel || iSubdet==StripSubdetector::TIB || iSubdet==StripSubdetector::TOB))continue;
      for(int iTree=0; iTree<tree.GetEntries(); ++iTree){
        tree.GetEntry(iTree);
        // Do not use glued Dets
        if(treeMemPtr->isDoubleSide)continue;
        if(treeMemPtr->subDetId == iSubdet){
          if(iSide!=treeMemPtr->side && (iSubdet==PixelSubdetector::PixelEndcap || iSubdet==StripSubdetector::TID || iSubdet==StripSubdetector::TEC))continue;
          treeEntries.push_back(iTree);
          if(hierarchyName.length() == 0){
            hierarchyName = (*substructureName)["subdet"];
            componentName = (*substructureName)["component"];
          }
        }
      }
      HarvestingHierarchy harvestingHierarchy(hierarchyName,componentName,treeEntries);
      vHarvestingHierarchy_.push_back(harvestingHierarchy);
      hierarchyName = ""; componentName = ""; treeEntries.clear();
    }
  }
  // Here could be a further separation of the HarvestingHierarchy.
  // E.g. separate the existing ones by layer and add them to the vector without deleting any element from the vector.
  // The existing hists will stay and the new ones are added
  
  // Now, book the corresponding histos
  this->bookHarvestingHists();
}


void
TrackerOfflineValidationSummary::bookHarvestingHists()
{
  edm::LogInfo("TrackerOfflineValidationSummary")<<"Harvesting histograms will be booked for "<<vHarvestingHierarchy_.size()<<" different hierarchy selections";
  for(std::vector<HarvestingHierarchy>::iterator iHier = vHarvestingHierarchy_.begin(); iHier != vHarvestingHierarchy_.end(); ++iHier){
    
    std::stringstream dmrXprimeHistoName, dmrYprimeHistoName, dmrXprimeHistoTitle, dmrYprimeHistoTitle;
    dmrXprimeHistoName << "h_DmrXprime_" << iHier->hierarchyName;
    dmrYprimeHistoName << "h_DmrYprime_" << iHier->hierarchyName;
    dmrXprimeHistoTitle<<  "DMR for " << iHier->hierarchyName <<";<#DeltaX> [cm];# modules";
    dmrYprimeHistoTitle<<  "DMR for " << iHier->hierarchyName <<";<#DeltaY> [cm];# modules";
    
    std::string directoryString(moduleDirectory_);
    if(directoryString.length()!=0)directoryString += "/";
    directoryString += iHier->componentName;
    dbe_->setCurrentFolder(directoryString);
    
    int nBinsX(0); double xMin(0.), xMax(0.);
    if(iHier->componentName == "Pixel"){
      this->getBinning("TH1DmrXprimePixelModules",nBinsX,xMin,xMax);
      iHier->harvestingHistos.DmrXprime = dbe_->book1D(dmrXprimeHistoName.str(),dmrXprimeHistoTitle.str(),nBinsX,xMin,xMax)->getTH1();
      this->getBinning("TH1DmrYprimePixelModules",nBinsX,xMin,xMax);
      iHier->harvestingHistos.DmrYprime = dbe_->book1D(dmrYprimeHistoName.str(),dmrYprimeHistoTitle.str(),nBinsX,xMin,xMax)->getTH1();
    }
    else if(iHier->componentName == "Strip"){
      this->getBinning("TH1DmrXprimeStripModules",nBinsX,xMin,xMax);
      iHier->harvestingHistos.DmrXprime = dbe_->book1D(dmrXprimeHistoName.str(),dmrXprimeHistoTitle.str(),nBinsX,xMin,xMax)->getTH1();
      if(!parSet_.getParameter<bool>("stripYDmrs"))continue;
      this->getBinning("TH1DmrYprimeStripModules",nBinsX,xMin,xMax);
      iHier->harvestingHistos.DmrYprime = dbe_->book1D(dmrYprimeHistoName.str(),dmrYprimeHistoTitle.str(),nBinsX,xMin,xMax)->getTH1();
    }
  }
}


void
TrackerOfflineValidationSummary::getBinning(const std::string& binningPSetName, int& nBinsX, double& lowerBoundX, double& upperBoundX)const
{
  const edm::ParameterSet& binningPSet = parSet_.getParameter<edm::ParameterSet>(binningPSetName);
  nBinsX      = binningPSet.getParameter<int>("Nbinx");                
  lowerBoundX = binningPSet.getParameter<double>("xmin");                      
  upperBoundX = binningPSet.getParameter<double>("xmax");
}


void
TrackerOfflineValidationSummary::fillHarvestingHists(TTree& tree)
{
  TkOffTreeVariables *treeMemPtr = 0;
  std::map<std::string,std::string> *substructureName = 0;
  tree.SetBranchAddress("TkOffTreeVariables", &treeMemPtr);
  tree.SetBranchAddress("SubstructureName", &substructureName);
  
  const unsigned int minEntriesPerModule(parSet_.getParameter<unsigned int>("minEntriesPerModuleForDmr"));
  edm::LogInfo("TrackerOfflineValidationSummary")<<"Median of a module is added to DMR plots if it contains at least "<<minEntriesPerModule<<" hits";
  
  for(std::vector<HarvestingHierarchy>::iterator iHier = vHarvestingHierarchy_.begin(); iHier != vHarvestingHierarchy_.end(); ++iHier){
    for(std::vector<unsigned int>::const_iterator iTreeEntries = iHier->treeEntries.begin(); iTreeEntries != iHier->treeEntries.end(); ++iTreeEntries){
      tree.GetEntry(*iTreeEntries);
      if(treeMemPtr->entries < minEntriesPerModule)continue;
      iHier->harvestingHistos.DmrXprime->Fill(treeMemPtr->medianX);
      if(iHier->harvestingHistos.DmrYprime)iHier->harvestingHistos.DmrYprime->Fill(treeMemPtr->medianY);
    }
  }
}


//define this as a plug-in
DEFINE_FWK_MODULE(TrackerOfflineValidationSummary);