/data/git/CMSSW_5_3_11_patch5/src/GeneratorInterface/RivetInterface/plugins/DQMRivetClient.cc

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/*
 *  Class:DQMRivetClient 
 *
 *
 *  $Date: 2012/06/22 08:47:17 $
 *  $Revision: 1.1 $
 * 
 *  \author Junghwan Goh - SungKyunKwan University
 */

#include "GeneratorInterface/RivetInterface/interface/DQMRivetClient.h"

#include "DQMServices/ClientConfig/interface/FitSlicesYTool.h"
#include "DQMServices/Core/interface/DQMStore.h"
#include "DQMServices/Core/interface/MonitorElement.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include <TH1F.h>
#include <TClass.h>
#include <TString.h>
#include <TPRegexp.h>

#include <cmath>
#include <boost/tokenizer.hpp>

using namespace std;
using namespace edm;

typedef MonitorElement ME;

TPRegexp metacharacters("[\\^\\$\\.\\*\\+\\?\\|\\(\\)\\{\\}\\[\\]]");

DQMRivetClient::DQMRivetClient(const ParameterSet& pset)
{
  
  typedef std::vector<edm::ParameterSet> VPSet;
  typedef std::vector<std::string> vstring;
  typedef boost::escaped_list_separator<char> elsc;

  elsc commonEscapes("\\", " \t", "\'"); 

  // Parse Normalization commands
  vstring normCmds = pset.getUntrackedParameter<vstring>("normalizationToIntegral", vstring());
  for ( vstring::const_iterator normCmd = normCmds.begin();
        normCmd != normCmds.end(); ++normCmd )
  {
    if ( normCmd->empty() ) continue;
    boost::tokenizer<elsc> tokens(*normCmd, commonEscapes);

    vector<string> args;
    for(boost::tokenizer<elsc>::const_iterator iToken = tokens.begin();
        iToken != tokens.end(); ++iToken) {
      if ( iToken->empty() ) continue;
      args.push_back(*iToken);
    }

    if ( args.empty() or args.size() > 2 ) {
      LogInfo("DQMRivetClient") << "Wrong input to normCmds\n";
      continue;
    }

    DQMGenericClient::NormOption opt;
    opt.name = args[0];
    opt.normHistName = args.size() == 2 ? args[1] : args[0];

    normOptions_.push_back(opt);
  }

  VPSet normSets = pset.getUntrackedParameter<VPSet>("normalizationToIntegralSets", VPSet());
  for ( VPSet::const_iterator normSet = normSets.begin();
        normSet != normSets.end(); ++normSet )
  {
    DQMGenericClient::NormOption opt;
    opt.name = normSet->getUntrackedParameter<string>("name");
    opt.normHistName = normSet->getUntrackedParameter<string>("normalizedTo", opt.name);

    normOptions_.push_back(opt);
  }

  //normalize to lumi 
  vstring lumiCmds = pset.getUntrackedParameter<vstring>("normalizationToLumi", vstring());
  for ( vstring::const_iterator lumiCmd = lumiCmds.begin();
        lumiCmd != lumiCmds.end(); ++lumiCmd )
  {
    if ( lumiCmd->empty() ) continue;
    boost::tokenizer<elsc> tokens(*lumiCmd, commonEscapes);

    vector<string> args;
    for(boost::tokenizer<elsc>::const_iterator iToken = tokens.begin();
        iToken != tokens.end(); ++iToken) {
      if ( iToken->empty() ) continue;
      args.push_back(*iToken);
    }

    if ( args.size() != 2 ) {
      LogInfo("DQMRivetClient") << "Wrong input to lumiCmds\n";
      continue;
    }

    DQMRivetClient::LumiOption opt;
    opt.name = args[0];
    opt.normHistName = args[1] ;
    opt.xsection = pset.getUntrackedParameter<double>("xsection", -1.);
    //opt.xsection = atof(args[2].c_str());

    //std::cout << opt.name << " " << opt.normHistName << " " << opt.xsection << std::endl; 
    lumiOptions_.push_back(opt);
  } 

  //multiply by a number
  vstring scaleCmds = pset.getUntrackedParameter<vstring>("scaleBy", vstring());
  for ( vstring::const_iterator scaleCmd = scaleCmds.begin();
        scaleCmd != scaleCmds.end(); ++scaleCmd )
  {
    if ( scaleCmd->empty() ) continue;
    boost::tokenizer<elsc> tokens(*scaleCmd, commonEscapes);

    vector<string> args;
    for(boost::tokenizer<elsc>::const_iterator iToken = tokens.begin();
        iToken != tokens.end(); ++iToken) {
      if ( iToken->empty() ) continue;
      args.push_back(*iToken);
    }

    if ( args.empty() or args.size() > 2 ) {
      LogInfo("DQMRivetClient") << "Wrong input to normCmds\n";
      continue;
    }

    ScaleFactorOption opt;
    opt.name = args[0];
    opt.scale = atof(args[1].c_str());
    scaleOptions_.push_back(opt);
  }  
   

  outputFileName_ = pset.getUntrackedParameter<string>("outputFileName", "");
  subDirs_ = pset.getUntrackedParameter<vstring>("subDirs");

}

void DQMRivetClient::endRun(const edm::Run& r, const edm::EventSetup& c) {

  typedef vector<string> vstring;

  // Update 2009-09-23
  // Migrated all code from endJob to this function
  // endJob is not necessarily called in the proper sequence
  // and does not necessarily book histograms produced in
  // that step.
  // It more robust to do the histogram manipulation in
  // this endRun function


  
  theDQM = 0;
  theDQM = Service<DQMStore>().operator->();

  if ( ! theDQM ) {
    LogInfo("DQMRivetClient") << "Cannot create DQMStore instance\n";
    return;
  }

  // Process wildcard in the sub-directory
  set<string> subDirSet;

  for(vstring::const_iterator iSubDir = subDirs_.begin();
      iSubDir != subDirs_.end(); ++iSubDir) {
    string subDir = *iSubDir;

    if ( subDir[subDir.size()-1] == '/' ) subDir.erase(subDir.size()-1);

    subDirSet.insert(subDir);
  }

  for(set<string>::const_iterator iSubDir = subDirSet.begin();
      iSubDir != subDirSet.end(); ++iSubDir) {
    const string& dirName = *iSubDir;
    for ( vector<DQMGenericClient::NormOption>::const_iterator normOption = normOptions_.begin();
          normOption != normOptions_.end(); ++normOption ){
      normalizeToIntegral(dirName, normOption->name, normOption->normHistName);
    }
  }

  for(set<string>::const_iterator iSubDir = subDirSet.begin();
      iSubDir != subDirSet.end(); ++iSubDir) {
    const string& dirName = *iSubDir;
    for ( vector<LumiOption>::const_iterator lumiOption = lumiOptions_.begin();
          lumiOption != lumiOptions_.end(); ++lumiOption ){
      normalizeToLumi(dirName, lumiOption->name, lumiOption->normHistName, lumiOption->xsection);
    }
  }

  for(set<string>::const_iterator iSubDir = subDirSet.begin();
      iSubDir != subDirSet.end(); ++iSubDir) {
    const string& dirName = *iSubDir;
    for ( vector<ScaleFactorOption>::const_iterator scaleOption = scaleOptions_.begin();
          scaleOption != scaleOptions_.end(); ++scaleOption ){
      scaleByFactor(dirName, scaleOption->name, scaleOption->scale);
    }
  }


  if ( ! outputFileName_.empty() ) theDQM->save(outputFileName_);
  
}

void DQMRivetClient::endJob()
{

  // Update 2009-09-23
  // Migrated all code from here to endRun

  LogTrace ("DQMRivetClient") << "inside of DQMGenericClient::endJob()"
                                << endl;

}

void DQMRivetClient::normalizeToIntegral(const std::string& startDir, const std::string& histName, const std::string& normHistName) 
{
  if ( ! theDQM->dirExists(startDir) ) {
    LogInfo("DQMRivetClient") << "normalizeToEntries() : "
                                     << "Cannot find sub-directory " << startDir << endl;
    return;
  }

  theDQM->cd();

  ME* element = theDQM->get(startDir+"/"+histName);
  ME* normME = theDQM->get(startDir+"/"+normHistName);

  if ( !element ) {
    LogInfo("DQMRivetClient") << "normalizeToEntries() : "
                                     << "No such element '" << histName << "' found\n";
    return;
  }

  if ( !normME ) {
    LogInfo("DQMRivetClient") << "normalizeToEntries() : "
                                     << "No such element '" << normHistName << "' found\n";
    return;
  }

  TH1F* hist  = element->getTH1F();
  if ( !hist) {
    LogInfo("DQMRivetClient") << "normalizeToEntries() : "
                                     << "Cannot create TH1F from ME\n";
    return;
  }

  TH1F* normHist = normME->getTH1F();
  if ( !normHist ) {
    LogInfo("DQMRivetClient") << "normalizeToEntries() : "
                                     << "Cannot create TH1F from ME\n";
    return;
  }

  const double entries = normHist->Integral();
  if ( entries != 0 ) {
    hist->Scale(1./entries, "width");
  }
  else {
    LogInfo("DQMRivetClient") << "normalizeToEntries() : " 
                                   << "Zero entries in histogram\n";
  }

  return;
}

void DQMRivetClient::normalizeToLumi(const std::string& startDir, const std::string& histName, const std::string& normHistName, double xsection){
  normalizeToIntegral(startDir, histName, normHistName);
  theDQM->cd();
  ME* element = theDQM->get(startDir+"/"+histName);
  TH1F* hist  = element->getTH1F();
  if ( !hist) {
    LogInfo("DQMRivetClient") << "normalizeToEntries() : "
                              << "Cannot create TH1F from ME\n";
    return;
  }
  hist->Scale(xsection);
  return;
}

void DQMRivetClient::scaleByFactor(const std::string& startDir, const std::string& histName, double factor){
  if ( ! theDQM->dirExists(startDir) ) {
    LogInfo("DQMRivetClient") << "normalizeToEntries() : "
                                     << "Cannot find sub-directory " << startDir << endl;
    return;
  }

  theDQM->cd();

  ME* element = theDQM->get(startDir+"/"+histName);

  if ( !element ) {
    LogInfo("DQMRivetClient") << "normalizeToEntries() : "
                                     << "No such element '" << histName << "' found\n";
    return;
  }

  TH1F* hist  = element->getTH1F();
  if ( !hist) {
    LogInfo("DQMRivetClient") << "normalizeToEntries() : "
                                     << "Cannot create TH1F from ME\n";
    return;
  }
  hist->Scale(factor);
}

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

DEFINE_FWK_MODULE(DQMRivetClient);