languagemodelmultifactor.h.svn-base

moses开源的机器翻译系统

// $Id$

/***********************************************************************
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
***********************************************************************/

#pragma once

#include <vector>
#include <string>
#include "LanguageModel.h"
#include "Word.h"
#include "FactorTypeSet.h"

class Phrase;

//! Abstract class for for multi factor LM 
class LanguageModelMultiFactor : public LanguageModel
{
protected:
	FactorMask m_factorTypes;

	LanguageModelMultiFactor(bool registerScore, ScoreIndexManager &scoreIndexManager);
	
public:
	virtual bool Load(const std::string &filePath
					, const std::vector<FactorType> &factorTypes
					, float weight
					, size_t nGramOrder) = 0;

	LMType GetLMType() const
	{
		return MultiFactor;
	}

	std::string GetScoreProducerDescription() const;	
	bool Useable(const Phrase &phrase) const;	
};