PickEvents.cc

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// -*- C++ -*-
//
// Package:    PickEvents
// Class:      PickEvents
// 
//
// Original Author:  Michael Henry Schmitt
//         Created:  Mon Sep 15 19:36:37 CEST 2008
// $Id: PickEvents.cc,v 1.4 2010/08/07 14:55:55 wmtan Exp $
//         Modified: 27/03/2009 Luca Malgeri
//                   reading external file, defining selection syntax
//         Modified: 30/06/2014 Giovanni Franzoni
//                   reading run-lumisection list from json
//
//


// system include files
#include <memory>
#include <iostream>
#include <fstream>
#include <vector>
#include <sstream>
#include <limits>
#include <cassert>

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

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

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

#include "DataFormats/Provenance/interface/LuminosityBlockRange.h"


// ordering function to sort LuminosityBlockRange based on the starting run number
bool orderLuminosityBlockRange (edm::LuminosityBlockRange u, edm::LuminosityBlockRange v) { return ( u.startRun() < v.startRun() ); }


//
// class declaration
//

class PickEvents : public edm::EDFilter {
   public:
      explicit PickEvents(const edm::ParameterSet&);
      ~PickEvents() override;

   private:
      void beginJob() override ;
      bool filter(edm::Event&, const edm::EventSetup&) override;
      void endJob() override ;

  std::string listrunevents_; 
  std::string listruneventsinpath_; 
  bool        isRunLsBased_;
  std::vector<edm::LuminosityBlockRange> luminositySectionsBlockRanges_;


  std::vector<bool> whattodo;
  std::vector<edm::RunNumber_t> startrun;
  std::vector<edm::RunNumber_t> endrun;
  std::vector<edm::EventNumber_t> startevent;
  std::vector<edm::EventNumber_t> endevent;
  
  int nEventsAnalyzed;
  int nEventsSelected;
      
};


PickEvents::PickEvents(const edm::ParameterSet& iConfig)
{

  isRunLsBased_=iConfig.getParameter<bool> ("IsRunLsBased");
  luminositySectionsBlockRanges_ = iConfig.getUntrackedParameter< std::vector<edm::LuminosityBlockRange> >("LuminositySectionsBlockRange");

  listruneventsinpath_=iConfig.getUntrackedParameter<std::string> ("RunEventList","");
  edm::FileInPath listruneventstmp(listruneventsinpath_);
  listrunevents_=listruneventstmp.fullPath();

  // sanity checks
  if ( isRunLsBased_ && luminositySectionsBlockRanges_.empty() ) {
    assert( "ERROR: selection based on run/Lumisection from json file, but LuminositySectionsBlockRange is emptpy." ==nullptr );
  }
  if ( (!isRunLsBased_) && !luminositySectionsBlockRanges_.empty() ) {
    assert( "ERROR: selection based on run/event from txt file, but LuminositySectionsBlockRange is not emptpy." ==nullptr );
  }

  if (isRunLsBased_ ){     std::cout <<"Selection based on run/luminositySection; file with run/event list: " << std::endl;      }  
  else              {     std::cout <<"Selection based on run/event; file with run/event list: "<< listrunevents_ << std::endl; }

}


PickEvents::~PickEvents()
{
}

bool
PickEvents::filter(edm::Event& iEvent, const edm::EventSetup& iSetup)
{
   using namespace edm;

   RunNumber_t             kRun   = iEvent.id().run();
   EventNumber_t           kEvent = iEvent.id().event();
   LuminosityBlockNumber_t kLumi = iEvent.id().luminosityBlock();

   bool selectThisEvent = false;

   // two alternative definition of the filter selection are possible, according to isRunLsBased_

   if( isRunLsBased_ ) {

     // std::cout << "GF DEBUG: kRun is " << kRun << " kLumi is: " << kLumi << std::endl;

     for(std::vector<edm::LuminosityBlockRange>::iterator oneLumiRange = luminositySectionsBlockRanges_.begin();
     oneLumiRange != luminositySectionsBlockRanges_.end(); ++oneLumiRange)
       {
     // luminositySectionsBlockRanges_ is sorted according to startRun()
     // => if kRun below it, you can stop the loop and return false
     if (  kRun < (*oneLumiRange).startRun()        ) {
       // std::cout << "GF DEBUG: LS has NOT PASSED (early bail-out) ! ***" << std::endl;
       break;
     }

     // if endRun() below kRun, go to the next iteration
     if (         (*oneLumiRange).endRun() < kRun   ) continue;

     // if the run number and lumi section match => exit from the loop
     if (   (*oneLumiRange).startLumi() <= kLumi     &&   kLumi <= (*oneLumiRange).endLumi()  )
       {
         selectThisEvent = true;
         // std::cout << "GF DEBUG: LS HAS PASSED ! ***" << std::endl;
         break;
       }

       }

   }        // end of isRunLsBased_
   else  {  // !isRunLsBased_

     for (unsigned int cond=0; cond<whattodo.size();cond++)
       {
     //       std::string what;
     if ( kRun>=startrun[cond] &&
          kRun<=endrun[cond]   &&
          kEvent>=startevent[cond] &&
          kEvent<=endevent[cond] )
       { // it's in the range, use
         selectThisEvent=whattodo[cond];
       }
       } // loop on whattodo

   } // !isRunLsBased_

   nEventsAnalyzed++;
   if (selectThisEvent) nEventsSelected++;
   //   if (selectThisEvent) std::cout << "Event selected: " << kRun << " " << kEvent << std::endl;

   return selectThisEvent;
}

void 
PickEvents::beginJob()
{
  using namespace std;

  std::string line;
  std::string buf;

  std::stringstream ss;
  std::vector<std::string> tokens;

  nEventsAnalyzed = 0;
  nEventsSelected = 0;


   if( isRunLsBased_ ) 
     {
       // sorting luminositySectionsBlockRanges_ according to the starting run of the block allows the speedup the search by an average factor 2
       std::sort (luminositySectionsBlockRanges_.begin(), luminositySectionsBlockRanges_.end(), orderLuminosityBlockRange);
     }      // if isRunLsBased_

   else {   // !isRunLsBased_

     // open file listevent file
     std::ifstream listfile;
     listfile.open(listrunevents_.c_str());
     if (listfile.is_open())
       {
     while (! listfile.eof() )
       {
         getline (listfile,line);
         ss.clear();
         ss.str(line);
         tokens.clear();
         while (ss>>buf)
           {
         tokens.push_back(buf);
         //       std::cout << buf << std::endl;
           }
         // std::cout << tokens.size() << std::endl;
         if (tokens.size()<3)
           {
         //       std::cout << "strange selection line:" << line << std::endl;
         //       std::cout << "skipping it" << std::endl;
         continue;
           }
         if(tokens[0]=="-" || tokens[0]=="+")
           {
         // it's a selection line, use it
         if(tokens[0]=="-") whattodo.push_back(false);
         else whattodo.push_back(true);

         // start with run selecion
         int loc=tokens[1].find(":",0);

         std::string first=tokens[1].substr(0,loc);
         startrun.push_back((edm::RunNumber_t)atoi(first.c_str()));

         std::string last=tokens[1].substr(loc+1,tokens[1].size());
         if (last=="infty")
           endrun.push_back(std::numeric_limits<unsigned int>::max());
         else
           endrun.push_back((edm::RunNumber_t) atoi(last.c_str()));

         // then event number selecion
         loc=tokens[2].find(":",0);

         first=tokens[2].substr(0,loc);
         startevent.push_back((edm::EventNumber_t)atoi(first.c_str()));

         last=tokens[2].substr(loc+1,tokens[2].size());
         if (last=="infty")
           endevent.push_back(edm::EventID::maxEventNumber());
         //     endevent.push_back(std::numeric_limits<long long int>::max());
         else
           endevent.push_back((edm::EventNumber_t)atoi(last.c_str()));

           }
       }
     listfile.close();
     // printout summary
     std::cout << "Summary from list of run/event number selection" << std::endl;
     for (unsigned int cond=0; cond<whattodo.size();cond++)
       {
         std::string what;
         if(whattodo[cond]) what="select";
         else what="reject";
         std::cout << what << " "; 
         std::cout << "from run " << startrun[cond] << " to run " << endrun[cond] << " ";
         std::cout << "from eve " << startevent[cond] << " to eve " << endevent[cond] << std::endl; 
       }
       }

     else std::cout << "Unable to open file"; 
     
   } // !isRunLsBased_


}
void 
PickEvents::endJob() {
  using namespace std;
  std::cout << "================================================\n"
       << "  n Events Analyzed ............... " << nEventsAnalyzed << std::endl
       << "  n Events Selected ............... " << nEventsSelected<< std::endl
       << "================================================\n\n" ;
}


DEFINE_FWK_MODULE(PickEvents);