phrasedictionarymemory.h.svn-base

moses开源的机器翻译系统

// $Id$
// vim:tabstop=2

/***********************************************************************
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 "PhraseDictionary.h"
#include "PhraseDictionaryNode.h"

/*** Implementation of a phrase table in a trie.  Looking up a phrase of
 * length n words requires n look-ups to find the TargetPhraseCollection.
 */
class PhraseDictionaryMemory : public PhraseDictionary
{
	typedef PhraseDictionary MyBase;
	friend std::ostream& operator<<(std::ostream&, const PhraseDictionaryMemory&);

protected:
	PhraseDictionaryNode m_collection;

	TargetPhraseCollection *CreateTargetPhraseCollection(const Phrase &source);
	
public:
	PhraseDictionaryMemory(size_t numScoreComponent)
		: MyBase(numScoreComponent)
	{
	}
	virtual ~PhraseDictionaryMemory();

	bool Load(const std::vector<FactorType> &input
								, const std::vector<FactorType> &output
								, const std::string &filePath
								, const std::vector<float> &weight
								, size_t tableLimit
								, const LMList &languageModels
						    , float weightWP);
	
	const TargetPhraseCollection *GetTargetPhraseCollection(const Phrase &source) const;

	void AddEquivPhrase(const Phrase &source, const TargetPhrase &targetPhrase);

	// for mert
	void SetWeightTransModel(const std::vector<float> &weightT);
	
	TO_STRING();
	
};