/***************************************************************************
 *   Copyright (C) 2005 by Christophe GONZALES et Pierre-Henri WUILLEMIN   *
 *   {prenom.nom}_at_lip6.fr                                               *
 *                                                                         *
 *   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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

namespace gum {

  /// returns the set of barren potentials in messages sent in a junction tree
  template < typename GUM_SCALAR >
  ArcProperty< Set< const Potential< GUM_SCALAR >* > >
     BarrenNodesFinder::barrenPotentials(const CliqueGraph& junction_tree,
                                         const IBayesNet< GUM_SCALAR >& bn) {
    // get the barren nodes
    ArcProperty< NodeSet > barren_nodes = this->barrenNodes(junction_tree);

    // transform the node sets into sets of potentials
    ArcProperty< Set< const Potential< GUM_SCALAR >* > > result;
    for (const auto& barren : barren_nodes) {
      Set< const Potential< GUM_SCALAR >* > potentials;
      for (const auto node : barren.second) {
        potentials.insert(&(bn.cpt(node)));
      }
      result.insert(Arc(barren.first), std::move(potentials));
    }

    return result;
  }


} /* namespace gum */
