PileupProfileWeight Class Reference

This class provides the weight used to reweight pileup (mu) distribution by querying JSON. More...

#include <PileupProfileWeight.h>

Inheritance diagram for PileupProfileWeight:

Collaboration diagram for PileupProfileWeight:

Public Member Functions
virtual StatusCode	initialize () override
virtual StatusCode	getValue (double &value) const override

Private Attributes
Gaudi::Property< std::string >	m_weightsFile {this, "WeightsFile", "", "Path to the weights file"}
nlohmann::json	m_weightsMap

Detailed Description

This class provides the weight used to reweight pileup (mu) distribution by querying JSON.

Definition at line 19 of file PileupProfileWeight.h.

Member Function Documentation

getValue()

StatusCode PileupProfileWeight::getValue ( double & value ) const

overridevirtual

Definition at line 22 of file PileupProfileWeight.cxx.

                                                            {
  const xAOD::EventInfo* evt {nullptr};
  ATH_CHECK(evtStore()->retrieve(evt, "EventInfo"));
 
  auto mu_actual = static_cast<std::size_t>(std::ceil(evt->actualInteractionsPerCrossing()));
  auto mu = std::to_string(mu_actual);
 
  // mu values that are not included in the weight mapping will be skipped
  if (m_weightsMap.find(mu) == m_weightsMap.end()) {
    value = 0.0;
    return StatusCode::SUCCESS;
  }
 
  // retrieve the weigths
  try {
    auto wt = m_weightsMap.at(mu).get<double>();
    value = wt;
  } catch (const std::exception&) {
    ATH_MSG_ERROR("Failed to get the mu weight!");
    return StatusCode::FAILURE;
  }
 
  return StatusCode::SUCCESS;
}

initialize()

StatusCode PileupProfileWeight::initialize ( )

overridevirtual

Definition at line 11 of file PileupProfileWeight.cxx.

                                           {
  std::ifstream fs(m_weightsFile);
  try {
    m_weightsMap = nlohmann::json::parse(fs);
  } catch (const std::exception&) {
    ATH_MSG_ERROR("Failed to parse input " << m_weightsFile);
    return StatusCode::FAILURE;
  }
  return StatusCode::SUCCESS;
}

Member Data Documentation

m_weightsFile

Gaudi::Property<std::string> PileupProfileWeight::m_weightsFile {this, "WeightsFile", "", "Path to the weights file"}

private

Definition at line 27 of file PileupProfileWeight.h.

{this, "WeightsFile", "", "Path to the weights file"};

m_weightsMap

nlohmann::json PileupProfileWeight::m_weightsMap

private

Definition at line 28 of file PileupProfileWeight.h.

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The documentation for this class was generated from the following files:

• PileupProfileWeight.h
• PileupProfileWeight.cxx