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https://github.com/moses-smt/mosesdecoder.git
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112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
#ifndef GLOBALLEXICALMODELUNLIMITED_H_
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#define GLOBALLEXICALMODELUNLIMITED_H_
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#include <stdexcept>
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#include <string>
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#include <vector>
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#include <boost/unordered_set.hpp>
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#include <boost/unordered_map.hpp>
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#include "StatelessFeatureFunction.h"
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#include "moses/Factor.h"
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#include "moses/Phrase.h"
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#include "moses/TypeDef.h"
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#include "moses/Util.h"
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#include "moses/WordsRange.h"
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#include "moses/FactorTypeSet.h"
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#include "moses/Sentence.h"
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#include "moses/FF/FFState.h"
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#ifdef WITH_THREADS
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#include <boost/thread/tss.hpp>
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#endif
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namespace Moses
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{
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class Factor;
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class Phrase;
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class Hypothesis;
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class InputType;
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/** Discriminatively trained global lexicon model
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* This is a implementation of Mauser et al., 2009's model that predicts
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* each output word from _all_ the input words. The intuition behind this
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* feature is that it uses context words for disambiguation
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*/
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class GlobalLexicalModelUnlimited : public StatelessFeatureFunction
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{
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typedef std::map< char, short > CharHash;
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typedef std::map< std::string, short > StringHash;
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struct ThreadLocalStorage {
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const Sentence *input;
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};
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private:
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#ifdef WITH_THREADS
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boost::thread_specific_ptr<ThreadLocalStorage> m_local;
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#else
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std::auto_ptr<ThreadLocalStorage> m_local;
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#endif
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CharHash m_punctuationHash;
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std::vector< FactorType > m_inputFactors;
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std::vector< FactorType > m_outputFactors;
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bool m_unrestricted;
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bool m_sourceContext;
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bool m_biphrase;
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bool m_bitrigger;
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bool m_biasFeature;
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bool m_ignorePunctuation;
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boost::unordered_set<std::string> m_vocabSource;
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boost::unordered_set<std::string> m_vocabTarget;
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public:
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GlobalLexicalModelUnlimited(const std::string &line);
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bool Load(const std::string &filePathSource, const std::string &filePathTarget);
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void InitializeForInput( Sentence const& in );
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const FFState* EmptyHypothesisState(const InputType &) const {
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return new DummyState();
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}
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//TODO: This implements the old interface, but cannot be updated because
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//it appears to be stateful
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void Evaluate(const Hypothesis& cur_hypo,
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ScoreComponentCollection* accumulator) const;
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void EvaluateChart(const ChartHypothesis& /* cur_hypo */,
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int /* featureID */,
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ScoreComponentCollection* ) const {
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throw std::logic_error("GlobalLexicalModelUnlimited not supported in chart decoder, yet");
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}
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void Evaluate(const InputType &input
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, const InputPath &inputPath
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, const TargetPhrase &targetPhrase
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, ScoreComponentCollection &scoreBreakdown
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, ScoreComponentCollection *estimatedFutureScore = NULL) const
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{}
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void Evaluate(const Phrase &source
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, const TargetPhrase &targetPhrase
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, ScoreComponentCollection &scoreBreakdown
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, ScoreComponentCollection &estimatedFutureScore) const
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{}
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void AddFeature(ScoreComponentCollection* accumulator,
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StringPiece sourceTrigger, StringPiece sourceWord, StringPiece targetTrigger,
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StringPiece targetWord) const;
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};
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}
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#endif /* GLOBALLEXICALMODELUNLIMITED_H_ */
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