JetCorrectionESChain.cc

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//
// Original Author:  Fedor Ratnikov
//         Created:  Dec. 28, 2006
//
//

#include "JetMETCorrections/Modules/interface/JetCorrectionESChain.h"
#include "JetMETCorrections/Objects/interface/ChainedJetCorrector.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "JetMETCorrections/Objects/interface/JetCorrectionsRecord.h"

#include <algorithm>

JetCorrectionESChain::JetCorrectionESChain(edm::ParameterSet const& fParameters) 
  : mCorrectors (fParameters.getParameter < std::vector<std::string> > ("correctors")),
    mChainCorrector (new ChainedJetCorrector ())
{
  std::string label(fParameters.getParameter<std::string>("@module_label"));
  if (std::find(mCorrectors.begin(), mCorrectors.end(), label) != mCorrectors.end()) {
    throw cms::Exception("Recursion is not allowed")
      << "JetCorrectionESChain: corrector " << label << " is chained to itself";
  }
  setWhatProduced(this, label);
}

JetCorrectionESChain::~JetCorrectionESChain() {}

boost::shared_ptr<JetCorrector> JetCorrectionESChain::produce(JetCorrectionsRecord const& fRecord) {
  ChainedJetCorrector* corrector = dynamic_cast<ChainedJetCorrector*>(&*mChainCorrector);
  corrector->clear ();
  for (size_t i = 0; i < mCorrectors.size(); ++i) {
    edm::ESHandle <JetCorrector> handle;
    fRecord.get(mCorrectors[i], handle);
    corrector->push_back(&*handle);
  }
  return mChainCorrector;
}