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/*
* LanguageModelDALM.h
*
* Created on: 5 Dec 2015
* Author: hieu
*/
#pragma once
#include "../FF/StatefulFeatureFunction.h"
#include "../legacy/Util2.h"
#include "../legacy/Factor.h"
namespace DALM
{
class Logger;
class Vocabulary;
class State;
class LM;
union Fragment;
class Gap;
typedef unsigned int VocabId;
}
namespace Moses2
{
class LanguageModelDALM: public StatefulFeatureFunction
{
public:
LanguageModelDALM(size_t startInd, const std::string &line);
virtual ~LanguageModelDALM();
virtual void Load(System &system);
virtual void SetParameter(const std::string& key, const std::string& value);
virtual FFState* BlankState(MemPool &pool, const System &sys) const;
virtual void EmptyHypothesisState(FFState &state, const ManagerBase &mgr,
const InputType &input, const Hypothesis &hypo) const;
virtual void
EvaluateInIsolation(MemPool &pool, const System &system, const Phrase &source,
const TargetPhraseImpl &targetPhrase, Scores &scores,
SCORE &estimatedScore) const;
virtual void EvaluateWhenApplied(const ManagerBase &mgr,
const Hypothesis &hypo, const FFState &prevState, Scores &scores,
FFState &state) const;
virtual void EvaluateWhenApplied(const SCFG::Manager &mgr,
const SCFG::Hypothesis &hypo, int featureID, Scores &scores,
FFState &state) const;
protected:
FactorType m_factorType;
std::string m_filePath;
size_t m_nGramOrder; //! max n-gram length contained in this LM
size_t m_ContextSize;
DALM::Logger *m_logger;
DALM::Vocabulary *m_vocab;
DALM::LM *m_lm;
DALM::VocabId wid_start, wid_end;
const Factor *m_beginSentenceFactor;
mutable std::vector<DALM::VocabId> m_vocabMap;
void CreateVocabMapping(const std::string &wordstxt, const System &system);
};
}
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