classDependencyGraph_tpl.h

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/**
 *
 *   Copyright (c) 2005-2021 by Pierre-Henri WUILLEMIN(@LIP6) & Christophe GONZALES(@AMU)
 *   info_at_agrum_dot_org
 *
 *  This library is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This library 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */


/**
 * @file
 * @brief Inline implementation of ClassDependencyGraph.
 *
 * @author Lionel TORTI and Pierre-Henri WUILLEMIN(@LIP6)
 */
#include <agrum/PRM/classDependencyGraph.h>

namespace gum {
  namespace prm {

    // Destructor.
    template < typename GUM_SCALAR >
    ClassDependencyGraph< GUM_SCALAR >::~ClassDependencyGraph() {
      GUM_DESTRUCTOR(ClassDependencyGraph);

      for (const auto& elt: _node_map_)
        delete elt.second;

      for (const auto& elt: _elt_map_)
        delete elt.second;
    }

    // Build the class dependency graph.
    template < typename GUM_SCALAR >
    void ClassDependencyGraph< GUM_SCALAR >::_buildGraph_(const PRM< GUM_SCALAR >& prm) {
      // First we add all nodes
      for (const auto ci: prm.classes()) {
        _node_map_.insert(ci, new HashTable< const PRMClassElement< GUM_SCALAR >*, NodeId >());

        for (const auto node: ci->containerDag().nodes())
          _addNode_(ci, ci->get(node));
      }

      for (const auto ii: prm.interfaces()) {
        _node_map_.insert(ii, new HashTable< const PRMClassElement< GUM_SCALAR >*, NodeId >());

        for (const auto node: ii->containerDag().nodes()) {
          _addNode_(ii, ii->get(node));
        }
      }

      // Then we add the arcs
      for (const auto cc: prm.classes())
        for (const auto node: cc->containerDag().nodes())
          _addArcs_(*cc, node, *(_node_map_[cc]));
    }

    // Add arcs in  _graph_.
    template < typename GUM_SCALAR >
    void ClassDependencyGraph< GUM_SCALAR >::_addArcs_(
       const PRMClassElementContainer< GUM_SCALAR >&              c,
       NodeId                                                     node,
       HashTable< const PRMClassElement< GUM_SCALAR >*, NodeId >& map) {
      switch (c.get(node).elt_type()) {
        case PRMClassElement< GUM_SCALAR >::prm_slotchain: {
          const PRMSlotChain< GUM_SCALAR >& sc
             = static_cast< const PRMSlotChain< GUM_SCALAR >& >(c.get(node));

          for (const auto chi: c.containerDag().children(node))
            _graph_.addArc((*(_node_map_[&(sc.end())]))[&(sc.end().get(sc.lastElt().safeName()))],
                           map[&(c.get(chi))]);

          break;
        }

        case PRMClassElement< GUM_SCALAR >::prm_aggregate:
        case PRMClassElement< GUM_SCALAR >::prm_attribute: {
          for (const auto chi: c.containerDag().children(node))
            _graph_.addArc(map[&(c.get(node))], map[&(c.get(chi))]);

          break;
        }

        default: { /* do nothing */
          break;
        }
      }
    }

    template < typename GUM_SCALAR >
    INLINE ClassDependencyGraph< GUM_SCALAR >::ClassDependencyGraph(const PRM< GUM_SCALAR >& prm) {
      GUM_CONSTRUCTOR(ClassDependencyGraph);
      _buildGraph_(prm);
    }

    template < typename GUM_SCALAR >
    INLINE ClassDependencyGraph< GUM_SCALAR >::ClassDependencyGraph(
       const ClassDependencyGraph< GUM_SCALAR >& source) :
        _graph_(source._graph_),
        _modalitites_(source._modalitites_), _elt_map_(source._elt_map_) {
      GUM_CONS_CPY(ClassDependencyGraph);

      for (const auto elt: source._node_map_) {
        _node_map_.insert(
           elt.first,
           new HashTable< const PRMClassElement< GUM_SCALAR >*, NodeId >(*elt.second));
      }
    }

    template < typename GUM_SCALAR >
    INLINE const DAG& ClassDependencyGraph< GUM_SCALAR >::dag() const {
      return _graph_;
    }

    template < typename GUM_SCALAR >
    INLINE const typename ClassDependencyGraph< GUM_SCALAR >::EltPair&
       ClassDependencyGraph< GUM_SCALAR >::get(NodeId id) const {
      return *(_elt_map_[id]);
    }

    template < typename GUM_SCALAR >
    INLINE NodeId
       ClassDependencyGraph< GUM_SCALAR >::get(const PRMClassElementContainer< GUM_SCALAR >& c,
                                               const PRMClassElement< GUM_SCALAR >& elt) const {
      return (*(_node_map_[&c]))[&elt];
    }

    template < typename GUM_SCALAR >
    INLINE const NodeProperty< Size >& ClassDependencyGraph< GUM_SCALAR >::modalities() const {
      return _modalitites_;
    }

    template < typename GUM_SCALAR >
    INLINE void ClassDependencyGraph< GUM_SCALAR >::_addNode_(
       const PRMClassElementContainer< GUM_SCALAR >* c,
       const PRMClassElement< GUM_SCALAR >&          elt) {
      switch (elt.elt_type()) {
        case PRMClassElement< GUM_SCALAR >::prm_attribute:
        case PRMClassElement< GUM_SCALAR >::prm_aggregate: {
          NodeId id = _graph_.addNode();
          _elt_map_.insert(id, new ClassDependencyGraph< GUM_SCALAR >::EltPair(c, &elt));
          _node_map_[c]->insert(&elt, id);
          _modalitites_.insert(id, elt.type().variable().domainSize());
          break;
        }

        default: { /* do nothing */
          break;
        }
      }
    }

  } /* namespace prm */
} /* namespace gum */