/***************************************************************************
 *   Copyright (C) 2005 by Pierre-Henri WUILLEMIN et Christophe GONZALES   *
 *   {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.             *
 ***************************************************************************/
/**
 * @file
 * @brief count aggregator
 *
 * @author Pierre-Henri WUILLEMIN et Christophe GONZALES
 */

#include <agrum/multidim/aggregators/count.h>
#include <sstream>

namespace gum {

  namespace aggregator {
    template < typename GUM_SCALAR >
    INLINE Count< GUM_SCALAR >::Count(Idx value) :
        MultiDimAggregator< GUM_SCALAR >(), __value(value) {
      GUM_CONSTRUCTOR(Count);
    }

    template < typename GUM_SCALAR >
    INLINE Count< GUM_SCALAR >::Count(const Count< GUM_SCALAR >& from) :
        MultiDimAggregator< GUM_SCALAR >(from) {
      __value = from.__value;
      GUM_CONS_CPY(Count);
    }

    template < typename GUM_SCALAR >
    INLINE Count< GUM_SCALAR >::~Count() {
      GUM_DESTRUCTOR(Count);
    }

    template < typename GUM_SCALAR >
    INLINE Idx Count< GUM_SCALAR >::_neutralElt() const {
      return (Idx)0;
    }

    template < typename GUM_SCALAR >
    INLINE Idx Count< GUM_SCALAR >::_fold(const DiscreteVariable& v,
                                          Idx                     i1,
                                          Idx                     i2,
                                          bool& stop_iteration) const {
      return (i1 == __value) ? 1 + i2 : i2;
    }

    template < typename GUM_SCALAR >
    INLINE std::string Count< GUM_SCALAR >::aggregatorName() const {
      std::stringstream ss;
      ss << "count[" << __value << "]";
      return ss.str();
    }

    template < typename GUM_SCALAR >
    INLINE MultiDimContainer< GUM_SCALAR >*
           Count< GUM_SCALAR >::newFactory() const {
      return new Count< GUM_SCALAR >(__value);
    }

  }   // namespace aggregator
}   // namespace gum
