TriggerExpressionPathReader.cc

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#include <cassert>
#include <sstream>

#include "FWCore/Utilities/interface/RegexMatch.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "HLTrigger/HLTcore/interface/TriggerExpressionData.h"
#include "HLTrigger/HLTcore/interface/TriggerExpressionPathReader.h"

namespace triggerExpression {

  // define the result of the module from the HLT reults
  bool PathReader::operator()(const Data& data) const {
    if (not data.hasHLT() && not data.usePathStatus())
      return false;

    auto const& triggers = masksEnabled() ? m_triggersAfterMasking : m_triggers;

    for (auto const& trigger : triggers)
      if (data.passHLT(trigger.second))
        return true;

    return false;
  }

  void PathReader::dump(std::ostream& out, bool const ignoreMasks) const {
    if (not m_initialised) {
      out << "Uninitialised_Path_Expression";
      return;
    }

    auto const& triggers = ignoreMasks or not masksEnabled() ? m_triggers : m_triggersAfterMasking;

    if (triggers.empty()) {
      out << "FALSE";
    } else if (triggers.size() == 1) {
      out << triggers[0].first;
    } else {
      out << "(" << triggers[0].first;
      for (unsigned int i = 1; i < triggers.size(); ++i)
        out << " OR " << triggers[i].first;
      out << ")";
    }
  }

  // (re)initialize the module
  void PathReader::init(const Data& data) {
    // clear the previous configuration
    m_triggers.clear();

    // check if the pattern has is a glob expression, or a single trigger name
    if (not edm::is_glob(m_pattern)) {
      // no wildcard expression
      auto index = data.triggerIndex(m_pattern);
      if (index >= 0)
        m_triggers.push_back(std::make_pair(m_pattern, index));
      else {
        std::stringstream msg;
        msg << "requested HLT path \"" << m_pattern << "\" does not exist - known paths are:";
        if (data.triggerNames().empty())
          msg << " (none)";
        else
          for (auto const& p : data.triggerNames())
            msg << "\n\t" << p;
        if (data.shouldThrow())
          throw cms::Exception("Configuration") << msg.str();
        else
          edm::LogWarning("Configuration") << msg.str();
      }
    } else {
      // expand wildcards in the pattern
      const std::vector<std::vector<std::string>::const_iterator>& matches =
          edm::regexMatch(data.triggerNames(), m_pattern);
      if (matches.empty()) {
        // m_pattern does not match any trigger paths
        std::stringstream msg;
        msg << "requested pattern \"" << m_pattern << "\" does not match any HLT paths - known paths are:";
        if (data.triggerNames().empty())
          msg << " (none)";
        else
          for (auto const& p : data.triggerNames())
            msg << "\n\t" << p;
        if (data.shouldThrow())
          throw cms::Exception("Configuration") << msg.str();
        else
          edm::LogWarning("Configuration") << msg.str();
      } else {
        // store indices corresponding to the matching triggers
        for (auto const& match : matches) {
          auto index = data.triggerIndex(*match);
          assert(index >= 0);
          m_triggers.push_back(std::make_pair(*match, index));
        }
      }
    }

    m_triggersAfterMasking = m_triggers;
    m_initialised = true;
  }

  void PathReader::mask(Evaluator const& eval) {
    auto const& triggersToMask = eval.triggers();

    if (triggersToMask.empty()) {
      edm::LogInfo("NoTriggersToMask") << "\tPathReader[\"" << *this << "\"]::mask(arg = \"" << eval << "\")"
                                       << " failed: arg.triggers() is empty";
      return;
    }

    // patterns() is always empty for a L1uGTReader, and not empty for PathReader;
    // here, L1uGTReader evaluators are skipped as they shouldn't be used to mask a PathReader
    if (eval.patterns().empty()) {
      edm::LogWarning("InvalidArgumentForMasking")
          << "\tPathReader[\"" << *this << "\"]::mask(arg = \"" << eval << "\")"
          << " failed: arg.patterns() is empty (arg is not a PathReader)";
      return;
    }

    enableMasks();

    // clang-format off
    m_triggersAfterMasking.erase(
      std::remove_if(
        m_triggersAfterMasking.begin(),
        m_triggersAfterMasking.end(),
        [&triggersToMask](auto const& foo) {
          return std::find(triggersToMask.begin(), triggersToMask.end(), foo) != triggersToMask.end();
        }
      ),
      m_triggersAfterMasking.end()
    );
    // clang-format on
  }

}  // namespace triggerExpression