/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/HLTriggerOffline/Common/src/HltComparator.cc

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// Originally written by James Jackson
// modified by Peter Wittich
// $Id: HltComparator.cc,v 1.8 2010/02/25 19:14:36 wdd Exp $

// user include files
#include "HLTriggerOffline/Common/interface/HltComparator.h"
#include "FWCore/Common/interface/TriggerNames.h"
//#include "FWCore/Utilities/interface/Exception.h"

//#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "CommonTools/UtilAlgos/interface/TFileService.h"

#include <TH1.h>
#include <vector>
#include <string>


typedef std::vector<std::string> StringCollection;


// types of outcomes possible.
// only some are errors
enum {
    kOnOffPass = 0, kOnOffFail, kOnPassOffFail, kOnFailOffPass, 
    kOnOffError, kOnRunOffError, kOnErrorOffRun, kOnRunOffNot, kOnNotOffRun,
    kOnOffNot
};


// Analyser constructor
HltComparator::HltComparator(const edm::ParameterSet & iConfig):
  hltOnlineResults_(iConfig.getParameter<edm::InputTag>("OnlineResults")),
  hltOfflineResults_(iConfig.getParameter<edm::InputTag>("OfflineResults")),
  init_(false),
  verbose_(iConfig.getUntrackedParameter<bool>("verbose")),
  skipPathList_(iConfig.getUntrackedParameter<std::vector<std::string> >("skipPaths")),
  usePathList_(iConfig.getUntrackedParameter<std::vector<std::string> >("usePaths"))
{
  //std::cout << " HERE I AM " << std::endl;
  produces<StringCollection >("failedTriggerDescription");
  //std::cout << " HERE I GO " << std::endl;
}


HltComparator::~HltComparator()
{
}

// Initialises online --> offline trigger bit mappings and histograms
void
HltComparator::initialise(const edm::TriggerResults & onlineResults,
                          const edm::TriggerResults & offlineResults,
                          edm::Event& e)
{
  init_ = true;

  // Get trigger names 
  const edm::TriggerNames & onlineTriggerNames = e.triggerNames(onlineResults);
  const edm::TriggerNames & offlineTriggerNames = e.triggerNames(offlineResults);
  onlineActualNames_ = onlineTriggerNames.triggerNames();
  offlineActualNames_ = offlineTriggerNames.triggerNames();
  numTriggers_ = onlineActualNames_.size();
  
  // do we need to throw? I guess the whole job is crap if this happens.
  // sort of assumes we're the only game in town.
  if (numTriggers_ != offlineActualNames_.size()) {
    throw cms::Exception("IncorrectTriggers") << "Online had "
                                              << numTriggers_ << "triggers, "
                                              << "Offline had " 
                                              << offlineActualNames_.size()
                                              << "triggers";
  }

  // Create bit mappings
  std::map<std::string, unsigned int >offlineNameBitMap;
  for (unsigned int i = 0; i < numTriggers_; ++i) {
    offlineNameBitMap[offlineActualNames_[i]] = i;
  }
  for (unsigned int i = 0; i < numTriggers_; ++i) {
    // Find offline position for fixed online bit
    std::map<std::string, unsigned int >::iterator it =
      offlineNameBitMap.find(onlineActualNames_[i]);
    if (it != offlineNameBitMap.end()) {
      onlineToOfflineBitMappings_.push_back(it->second);
    }
    else {
      throw cms:: Exception("IncorrectTriggers") << "Online trigger path " 
                                                 << onlineActualNames_[i] 
                                                 << " not found in Offline "
        "processing";
    }
  }
  
  // Create histograms
  edm::Service<TFileService> fs;
  for (std::vector<std::string>::iterator it = onlineActualNames_.begin();
       it != onlineActualNames_.end(); ++it) {
    // Bin descriptions: OnOfPass, OnOffFail, OnPassOffFail, OnFailOffPass, 
    // OnOffError, OnRunOffError, OnErrorOffRun, OnRunOffNot OnNotOffRun 
    // OnNotOffNot
    TH1F *h = fs->make<TH1F>(it->c_str(), it->c_str(), 10, 0, 10);
    TAxis *a = h->GetXaxis();
    a->SetBinLabel(1, "OnPass_OffPass");
    a->SetBinLabel(2, "OnFail_OffFail");
    a->SetBinLabel(3, "OnPass_OffFail");
    a->SetBinLabel(4, "OnFail_OffPass");
    a->SetBinLabel(5, "OnError_OffError");
    a->SetBinLabel(6, "OnRun_OffError");
    a->SetBinLabel(7, "OnError_OffRun");
    a->SetBinLabel(8, "OnRun_OffNotRun");
    a->SetBinLabel(9, "OnNotRun_OffRun");
    a->SetBinLabel(10, "OnNotRun_OffNotRun");
    comparisonHists_.push_back(h);
  }
}

// Format a comparison result
std::string HltComparator::formatResult(const unsigned int i)
{
  switch (i) {
  case 0:
    return std::string("OnPass_OffPass");
    break;
  case 1:
    return std::string("OnFail_OffFail");
    break;
  case 2:
    return std::string("OnPass_OffFail");
    break;
  case 3:
    return std::string("OnFail_OffPass");
    break;
  case 4:
    return std::string("OnError_OffError");
    break;
  case 5:
    return std::string("OnRun_OffError");
    break;
  case 6:
    return std::string("OnError_OffRun");
    break;
  case 7:
    return std::string("OnRun_OffNotRun");
    break;
  case 8:
    return std::string("OnNotRun_OffRun");
    break;
  case 9:
    return std::string("OnNotRun_OffNotRun");
    break;
  }
  return std::string("CODE NOT KNOWN");
}

bool
HltComparator::filter(edm::Event & event,
                      const edm::EventSetup & iSetup)
{
  //std::cout << "top of the filter " << std::endl;
  // Get trigger results
  edm::Handle<edm::TriggerResults> onlineResults;
  edm::Handle<edm::TriggerResults> offlineResults;
  event.getByLabel(hltOnlineResults_, onlineResults);
  event.getByLabel(hltOfflineResults_, offlineResults);

  std::auto_ptr<StringCollection> resultDescription(new StringCollection);
  
  // Initialise comparator if required
  if (!init_) {
    initialise(*onlineResults, *offlineResults, event);
  }
  
  // Perform trigger checks
  bool hasDisagreement = false;
  for (unsigned int i = 0; i < numTriggers_; ++i) {
    unsigned int offlineTriggerBit = onlineToOfflineBitMappings_[i];
    
    bool onRun = onlineResults->wasrun(i);
    bool offRun = offlineResults->wasrun(offlineTriggerBit);
    bool onAccept = onlineResults->accept(i);
    bool offAccept = offlineResults->accept(offlineTriggerBit);
    bool onError = onlineResults->error(i);
    bool offError = offlineResults->error(offlineTriggerBit);
    
    int result = -1;
    if (onError || offError) {
      if (onError && offError) {
        result = 4;
      }
      else if (onError) {
        result = 6;
      }
      else {
        result = 5;
      }
    }
    else if ((!onRun) || (!offRun)) {
      if ((!onRun) && (!offRun)) {
        result = 9;
      }
      else if (!onRun) {
        result = 8;
      }
      else {
        result = 7;
      }
    }
    else {
      if (onAccept && offAccept) {
        result = 0;
      }
      else if ((!onAccept) && (!offAccept)) {
        result = 1;
      }
      else if (onAccept) {
        result = 2;
      }
      else {
        result = 3;
      }
    }
    
    // Fill the results histogram
    comparisonHists_[i]->Fill(result);

  // if the online-offline comparison results in a failure, we
  // want to send the result to a special stream. Hence we _pass_ the filter.
  // If it all worked as expected the filter fails and the event doesn't go
  // to the output stream.
    if ( (result == kOnPassOffFail) || ( result == kOnFailOffPass ) ||
         (result == kOnRunOffError) || ( result == kOnErrorOffRun ) ||
         (result == kOnRunOffNot)   || ( result == kOnNotOffRun ) ) {
      // is this one we should ignore? check the skip list
      if ( verbose() ) {
        std::cout << "Found disagreemenet " << result << ", name is " 
                  << onlineActualNames_[i]
                  << std::endl;
      }
      std::ostringstream desc;
      desc << onlineActualNames_[i] << ":" << formatResult(result);
      resultDescription->push_back(desc.str());
      if ( std::find(skipPathList_.begin(), skipPathList_.end(), 
                     onlineActualNames_[i]) == skipPathList_.end() ) {

        if (usePathList_.size()!=0){
          //only use specified paths to debug
          if (std::find(usePathList_.begin(), usePathList_.end(),
                        onlineActualNames_[i]) != usePathList_.end() )
            hasDisagreement = true;
        }
        else
          hasDisagreement = true;
      }
    }
      
    // Record the trigger error code
    // I think this should be result > 2? (pw)
    if (verbose() && (result > 1)) {
      std::cout << "HLT-Compare: Event " << event.id().event() 
                << " Path " << onlineActualNames_[i] << " " 
                << formatResult(result) << std::endl;
#ifdef NOTDEF      
      triggerComparisonErrors_[event.id().event()][onlineActualNames_[i]] = result;
#endif // NOTDEF
    }
  }

  //std::cout << " HERE I STAY " << std::endl;
  event.put(resultDescription,"failedTriggerDescription");
  //std::cout << " HERE I WENT " << std::endl;

  if ( hasDisagreement ) 
    return true;
  else
    return false;
}


void
HltComparator::beginJob()
{
}

// Print the trigger results
void
HltComparator::endJob()
{
#ifdef NOTDEF
  std::cout << "HLT-Compare ---------- Trigger Comparison Summary ----------" << std::endl;
  std::cout << "HLT-Compare  The following events had trigger mismatches:" << std::endl;
  std::map<unsigned int, std::map<std::string, unsigned int> >::iterator it;
  for(it = triggerComparisonErrors_.begin(); it != triggerComparisonErrors_.end(); ++it) {
    std::cout << "HLT-Compare  Event: " << it->first << std::endl;
    std::map<std::string, unsigned int>::iterator jt;
    for(jt = it->second.begin(); jt != it->second.end(); ++jt) {
      std::cout << "HLT-Compare    Path: " << jt->first << " : " << formatResult(jt->second) << std::endl;
    }
  }
  std::cout << "HLT-Compare ------------ End Trigger Comparison ------------" << std::endl;
#endif //NOTDEF
}