EventModifier.cpp

Go to the documentation of this file.

/*
 *  CepGen: a central exclusive processes event generator
 *  Copyright (C) 2019-2024  Laurent Forthomme
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "CepGen/Core/ParametersList.h"
#include "CepGen/EventFilter/EventModifier.h"
#include "CepGen/Utils/Message.h"
 
namespace cepgen {
  EventModifier::EventModifier(const ParametersList& params)
      : EventHandler(params), seed_(steerAs<int, long long>("seed")), max_trials_(steer<int>("maxTrials")) {
    CG_DEBUG("EventModifier:init") << "\"" << name_ << "\"-type event modifier built with:\n\t"
                                   << "* seed = " << seed_ << "\n\t"
                                   << "* maximum trials: " << max_trials_;
  }
 
  void EventModifier::readStrings(const std::vector<std::string>& params) {
    if (params.empty())
      return;
    std::ostringstream os;
    for (const auto& p : params) {
      readString(p);
      os << "\n\t  '" << p << "'";
    }
    CG_DEBUG("EventModifier:configure") << "Feeding \"" << name_ << "\" event modifier algorithm with:" << os.str();
  }
 
  ParametersDescription EventModifier::description() {
    auto desc = EventHandler::description();
    desc.add<int>("seed", -1).setDescription("Random number generator seed");
    desc.add<int>("maxTrials", 1)
        .setDescription(
            "Maximum number of attempts to modify the event"
            " before giving up and returning a zero-weight");
    return desc;
  }
}  // namespace cepgen