branch_fast.hpp

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/***************************************************************************
*                                                                          *
*   Copyright (C) 2018 by David B. Blumenthal                              *
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*   This file is part of GEDLIB.                                           *
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*   GEDLIB is free software: you can redistribute it and/or modify it      *
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*   GNU Lesser General Public License for more details.                    *
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#ifndef SRC_METHODS_BRANCH_FAST_HPP_
#define SRC_METHODS_BRANCH_FAST_HPP_

namespace ged {

template<class UserNodeLabel, class UserEdgeLabel>
class BranchFast : public LSAPEBasedMethod<UserNodeLabel, UserEdgeLabel> {

public:
    virtual ~BranchFast();

    BranchFast(const GEDData<UserNodeLabel, UserEdgeLabel> & ged_data);

private:

    enum SortMethod_ {STD, COUNTING};

    class SortedEdgeLabels_ {
    public:
        SortedEdgeLabels_(const GEDGraph & g, SortMethod_ sort_method);

        SortedEdgeLabels_();

        void operator=(const SortedEdgeLabels_ & sorted_edge_labels);

        const std::vector<LabelID> & get_incident_labels(GEDGraph::NodeID) const;
    private:
        std::map<GEDGraph::NodeID, std::vector<LabelID>> sorted_edge_labels_;
    };

    SortMethod_ sort_method_;

    std::map<GEDGraph::GraphID, SortedEdgeLabels_> sorted_edge_labels_;

    // Member functions inherited from LSAPEBasedMethod.

    virtual bool lsape_parse_option_(const std::string & option, const std::string & arg) final;

    virtual std::string lsape_valid_options_string_() const final;

    virtual void lsape_set_default_options_() final;

    virtual void lsape_populate_instance_(const GEDGraph & g, const GEDGraph & h, DMatrix & master_problem) final;

    virtual void lsape_init_graph_(const GEDGraph & graph) final;

    // Private helper member functions.

    double compute_substitution_cost_(const GEDGraph & g, const GEDGraph & h, GEDGraph::NodeID i, GEDGraph::NodeID k,
            const SortedEdgeLabels_ & sorted_edge_labels_g, const SortedEdgeLabels_ & sorted_edge_labels_h) const;

    double compute_deletion_cost_(const GEDGraph & g, GEDGraph::NodeID i) const;

    double compute_insertion_cost_(const GEDGraph & h, GEDGraph::NodeID k) const;
};

}

#endif /* SRC_METHODS_BRANCH_FAST_HPP_ */