/data/refman/pasoursint/CMSSW_6_1_1/src/CalibMuon/DTCalibration/plugins/DTT0FillDefaultFromDB.cc

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/*
 *  See header file for a description of this class.
 *
 *  $Date: 2012/03/02 19:47:32 $
 *  $Revision: 1.1 $
 *  \author A. Vilela Pereira
 */

#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