EventModifier.h

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/*
 *  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/>.
 */
 
#ifndef CepGen_EventFilter_EventModifier_h
#define CepGen_EventFilter_EventModifier_h
 
#include "CepGen/EventFilter/EventHandler.h"
 
namespace cepgen {
  class Value;
  class EventModifier : public EventHandler {
  public:
    explicit EventModifier(const ParametersList&);  
 
    static ParametersDescription description();
 
    void setSeed(long long seed) { seed_ = seed; }
 
    inline virtual void readString(const std::string&) {}       
    virtual void readStrings(const std::vector<std::string>&);  
 
    virtual bool run(Event& ev, double& weight, bool fast = false) = 0;
    inline virtual void setCrossSection(const Value&) {}  
 
  protected:
    long long seed_{0ll};           
    unsigned short max_trials_{1};  
  };
}  // namespace cepgen
 
#endif