DTT0FillDefaultFromDB.cc

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/*
 *  See header file for a description of this class.
 */
 
#include "DTT0FillDefaultFromDB.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
 
#include "DataFormats/MuonDetId/interface/DTWireId.h"
#include "CondFormats/DTObjects/interface/DTT0.h"
#include "CondFormats/DataRecord/interface/DTT0Rcd.h"
 
#include <string>
 
using namespace std;
using namespace edm;
 
namespace dtCalibration {
 
  DTT0FillDefaultFromDB::DTT0FillDefaultFromDB(const ParameterSet& pset)
      : dbLabelRef_(pset.getParameter<string>("dbLabelRef")) {}
 
  DTT0FillDefaultFromDB::~DTT0FillDefaultFromDB() {}
 
  void DTT0FillDefaultFromDB::setES(const EventSetup& setup) {
    // Get t0 record from DB
    ESHandle<DTT0> t0H;
    setup.get<DTT0Rcd>().get(t0H);
    t0Map_ = &*t0H;
    LogVerbatim("Calibration") << "[DTT0FillDefaultFromDB] T0 version: " << t0H->version();
 
    // Get reference t0 DB
    ESHandle<DTT0> t0RefH;
    setup.get<DTT0Rcd>().get(dbLabelRef_, t0RefH);
    t0MapRef_ = &*t0RefH;
    LogVerbatim("Calibration") << "[DTT0FillDefaultFromDB] Reference T0 version: " << t0RefH->version();
  }
 
  DTT0Data DTT0FillDefaultFromDB::correction(const DTWireId& wireId) {
    // Try to access value in default DB
    // If it does not exist return value from reference DB
    // If it does not exist in reference DB, throw exception
    // Could also set to default zero value
    float t0Mean, t0RMS;
    int status = t0Map_->get(wireId, t0Mean, t0RMS, DTTimeUnits::counts);
    if (!status) {
      return DTT0Data(t0Mean, t0RMS);
    } else {
      // Now access reference DB
      float t0MeanRef, t0RMSRef;
      int statusRef = t0MapRef_->get(wireId, t0MeanRef, t0RMSRef, DTTimeUnits::counts);
      if (!statusRef) {
        return DTT0Data(t0MeanRef, t0RMSRef);
      } else {
        //...
        throw cms::Exception("[DTT0FillDefaultFromDB]")
            << "Could not find t0 entry in reference DB for" << wireId << endl;
      }
    }
  }
 
}  // namespace dtCalibration