pgr_bipartite_driver.hpp

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/*PGR-GNU*****************************************************************
File: pgr_bipartite_driver.hpp
 
Generated with Template by:
Copyright (c) 2015 pgRouting developers
Mail: [email protected]
 
Function's developer:
Copyright (c) 2020 Prakash Tiwari
Mail: [email protected]
 
------
 
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 2 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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
 ********************************************************************PGR-GNU*/
 
 
#ifndef INCLUDE_COLORING_PGR_BIPARTITE_DRIVER_HPP_
#define INCLUDE_COLORING_PGR_BIPARTITE_DRIVER_HPP_
#pragma once
 
#include <boost/property_map/property_map.hpp>
#include <boost/property_map/vector_property_map.hpp>
#include <boost/type_traits.hpp>
#include <boost/graph/bipartite.hpp>
 
#include <iostream>
#include <algorithm>
#include <vector>
 
#include "cpp_common/pgr_base_graph.hpp"
#include "cpp_common/pgr_messages.h"
#include "cpp_common/interruption.h"
 
 
namespace pgrouting {
namespace functions {
 
template<class G>
class Pgr_Bipartite : public pgrouting::Pgr_messages {
 public:
            typedef typename G::V_i V_i;
            std::vector<pgr_bipartite_rt> print_Bipartite(
                    G &graph) {
                std::vector<pgr_bipartite_rt> results;
                std::vector <boost::default_color_type> partition(graph.num_vertices());
                auto partition_map =
                    make_iterator_property_map(partition.begin(), boost::get(boost::vertex_index, graph.graph));
 
               /* abort in case of an interruption occurs (e.g. the query is being cancelled) */
                CHECK_FOR_INTERRUPTS();
                try {
                boost::is_bipartite(graph.graph, boost::get(boost::vertex_index, graph.graph), partition_map);
                     } catch (boost::exception const& ex) {
                          (void)ex;
                             throw;
                     } catch (std::exception &e) {
                         (void)e;
                         throw;
                      } catch (...) {
                          throw;
                      }
                V_i v, vend;
                for (boost::tie(v, vend) = vertices(graph.graph); v != vend; ++v) {
                    int64_t vid = graph[*v].id;
                    boost::get(partition_map, *v) ==
                        boost::color_traits <boost::default_color_type>::white() ?
                        results.push_back({vid, 0}) :results.push_back({vid, 1});
                }
                return results;
            }
            std::vector<pgr_bipartite_rt> pgr_bipartite(
                    G &graph ){
                std::vector<pgr_bipartite_rt> results;
                bool bipartite = boost::is_bipartite(graph.graph);
                if (bipartite) results = print_Bipartite(graph);
                return results;
            }
};
}  // namespace functions
}  // namespace pgrouting
#endif  // INCLUDE_COLORING_PGR_BIPARTITE_DRIVER_HPP_