partition_history.hh

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// This file is part of Awali.
// Copyright 2016-2023 Sylvain Lombardy, Victor Marsault, Jacques Sakarovitch
//
// Awali is a 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
// (at your option) 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 AWALI_PARTITION_HISTORY_HH
# define AWALI_PARTITION_HISTORY_HH
 
# include <map>
# include <set>
 
#include <awali/sttc/history/history.hh>
 
# include <stdexcept>
 
namespace awali {
  namespace sttc {
 
        //Make every state in relation with the set of states of another automaton
  template <typename Autb>
    class partition_history final : public history_base
    {
    public:
      //the subsets of source states are std::set of states
      using state_set_t = std::set<state_t>;
 
    private:
      std::map<state_t, state_set_t> origins_;
      Autb from_;
 
    public:
      partition_history(const Autb& source)
        : from_(source)
      {}
 
      history_kind_t get_nature() const override
      {
        return history_kind_t::PARTITION;
      }
 
      bool has_history(state_t s) const override {
        return (origins_.find(s)!=origins_.end());
      }
 
      bool remove_history(state_t s) override {
        return origins_.erase(s);
      }
 
      std::ostream&
      print_state_name(state_t s, std::ostream& o,
                       const std::string& fmt) const override
      {
        const auto& set = origins_.at(s);
        const char* separator = "{";
        for (auto origin_state : set)
          {
            o << separator;
            from_->print_state_history(origin_state , o, fmt);
            separator = ", ";
          }
        return o << "}";
      }
 
      const std::map<state_t, state_set_t>& origins() const
      {
        return origins_;
      }
 
      void
      add_state(state_t s,const state_set_t& set)
      {
        origins_[s] = set;
      }
 
     state_t get_state(state_t) override {
        throw std::runtime_error("Origin state not available");
      }
 
      std::vector<state_t> get_state_set(state_t s) override {
        std::vector<state_t> v(origins_[s].begin(),origins_[s].end());
        return v;
      }
 
    }; // class
 
}}//end of ns awali::stc
 
#endif // !AWALI_PARTITION_HISTORY_HH