// $Id$

/***********************************************************************
Moses - factored phrase-based language decoder
Copyright (C) 2006 University of Edinburgh

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 2.1 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, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
***********************************************************************/

#include "LM/MultiFactor.h"
#include "Phrase.h"

namespace Moses
{
bool LanguageModelMultiFactor::Useable(const Phrase &phrase) const
{
  if (phrase.GetSize()==0)
    return false;

  // whether phrase contains all factors in this LM
  const Word &word = phrase.GetWord(0);
  for (size_t currFactor = 0 ; currFactor < MAX_NUM_FACTORS ; ++currFactor) {
    if (m_factorTypes[currFactor] && word[currFactor] == NULL)
      return false;
  }
  return  true;

}

}