EventFlagSelectionAlg.cxx

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/

 
#include <AsgAnalysisAlgorithms/EventFlagSelectionAlg.h>
#include <EventBookkeeperTools/FilterReporter.h>
#include <xAODEventInfo/EventInfo.h>
 
StatusCode CP::EventFlagSelectionAlg::initialize()
{
  if (m_invertFlags.size() != m_selFlags.size() && !m_invertFlags.empty()) {
    ATH_MSG_ERROR("Property invertFlags has different size to selectionFlags. Please check your configuration");
    return StatusCode::FAILURE;
  }
  if (m_invertFlags.empty()) {
    m_invertFlags = std::vector<bool>(m_selFlags.size(), false);
  }
 
  for (size_t index = 0; index < m_selFlags.size(); ++index) {
    const std::string& thisflag = m_selFlags[index];
    if (thisflag.empty()) {
      ATH_MSG_ERROR("Empty string passed as selection flag!");
      return StatusCode::FAILURE;
    } else {
      std::unique_ptr<ISelectionReadAccessor> accessor;
      ANA_CHECK (makeSelectionReadAccessor (m_selFlags[index], accessor));
      m_accessors.push_back(std::move(accessor));
    }
  }
 
  ANA_CHECK(m_filterParams.initialize());
 
  return StatusCode::SUCCESS;
}
 
StatusCode CP::EventFlagSelectionAlg::execute(const EventContext& /*ctx*/)
{
  FilterReporter filter (m_filterParams, false);
 
  const xAOD::EventInfo *evtInfo = nullptr;
  ANA_CHECK(evtStore()->retrieve(evtInfo, "EventInfo"));
 
  for (size_t index = 0; index < m_selFlags.size(); ++index) {
    // Test against the opposite of the invert value
    bool testval = !m_invertFlags[index];
    ATH_MSG_VERBOSE("Now testing flag \"" << m_selFlags[index] << "\" requiring value " << testval);
 
    if (m_accessors[index]->getBool(*evtInfo) != testval) {
      ATH_MSG_VERBOSE("Event failed.");
      filter.setPassed(false);
      return StatusCode::SUCCESS;
    }
  }
 
  ATH_MSG_VERBOSE("Event passed all flags.");
  filter.setPassed(true);
 
  return StatusCode::SUCCESS;
}
 
StatusCode CP::EventFlagSelectionAlg::finalize()
{
  ANA_MSG_INFO (m_filterParams.summary());
 
  return StatusCode::SUCCESS;
}