Moses::TargetNgramFeature Class Reference

#include <TargetNgramFeature.h>

Inheritance diagram for Moses::TargetNgramFeature:

Collaboration diagram for Moses::TargetNgramFeature:

List of all members.

Public Member Functions

TargetNgramFeature (const std::string &line)

void Load (AllOptions::ptr const &opts)

override to load model files

bool IsUseable (const FactorMask &mask) const

virtual const FFState * EmptyHypothesisState (const InputType &input) const

return the state associated with the empty hypothesis for a given sentence

virtual FFState * EvaluateWhenApplied (const Hypothesis &cur_hypo, const FFState *prev_state, ScoreComponentCollection *accumulator) const

This interface should be implemented. Notes: When evaluating the value of this feature function, you should avoid calling hypo.GetPrevHypo(). If you need something from the "previous" hypothesis, you should store it in an FFState object which will be passed in as prev_state. If you don't do this, you will get in trouble.

virtual FFState * EvaluateWhenApplied (const ChartHypothesis &cur_hypo, int featureId, ScoreComponentCollection *accumulator) const

void SetParameter (const std::string &key, const std::string &value)

Detailed Description

Sets the features of observed ngrams.

Definition at line 201 of file TargetNgramFeature.h.

Constructor & Destructor Documentation

Moses::TargetNgramFeature::TargetNgramFeature ( const std::string & line )

Definition at line 47 of file TargetNgramFeature.cpp.

References Moses::FactorCollection::AddFactor(), BOS_, Moses::FeatureFunction::GetScoreProducerDescription(), Moses::FactorCollection::Instance(), Moses::Output, Moses::FeatureFunction::ReadParameters(), and Moses::Word::SetFactor().

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Member Function Documentation

const FFState * Moses::TargetNgramFeature::EmptyHypothesisState ( const InputType & input ) const [virtual]

return the state associated with the empty hypothesis for a given sentence

Implements Moses::StatefulFeatureFunction.

Definition at line 100 of file TargetNgramFeature.cpp.

FFState * Moses::TargetNgramFeature::EvaluateWhenApplied	(	const ChartHypothesis &	cur_hypo,
		int	featureId,
		ScoreComponentCollection *	accumulator
	)			const `[virtual]`

Implements Moses::StatefulFeatureFunction.

Definition at line 218 of file TargetNgramFeature.cpp.

References StringPiece::compare(), Moses::TargetPhrase::GetAlignNonTerm(), Moses::ChartHypothesis::GetCurrTargetPhrase(), Moses::ChartHypothesis::GetFFState(), Moses::AlignmentInfo::GetNonTermIndexMap(), Moses::TargetNgramChartState::GetNumTargetTerminals(), Moses::TargetNgramChartState::GetPrefix(), Moses::ChartHypothesis::GetPrevHypo(), Moses::Phrase::GetSize(), Moses::Word::GetString(), Moses::TargetNgramChartState::GetSuffix(), Moses::Phrase::GetWord(), Moses::Word::IsNonTerminal(), Moses::ScoreComponentCollection::SparseMinusEquals(), Moses::ScoreComponentCollection::SparsePlusEquals(), and util::StringStream::str().

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FFState * Moses::TargetNgramFeature::EvaluateWhenApplied	(	const Hypothesis &	cur_hypo,
		const FFState *	prev_state,
		ScoreComponentCollection *	accumulator
	)			const `[virtual]`

This interface should be implemented. Notes: When evaluating the value of this feature function, you should avoid calling hypo.GetPrevHypo(). If you need something from the "previous" hypothesis, you should store it in an FFState object which will be passed in as prev_state. If you don't do this, you will get in trouble.

Implements Moses::StatefulFeatureFunction.

Definition at line 106 of file TargetNgramFeature.cpp.

References EOS_, FindStringPiece(), Moses::Hypothesis::GetCurrTargetPhrase(), Moses::Hypothesis::GetSize(), Moses::Phrase::GetSize(), Moses::Word::GetString(), Moses::Hypothesis::GetWord(), Moses::Phrase::GetWord(), Moses::TargetNgramState::GetWords(), Moses::Hypothesis::GetWordsBitmap(), Moses::Bitmap::IsComplete(), n, Moses::ScoreComponentCollection::PlusEquals(), skip, and util::StringStream::str().

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bool Moses::TargetNgramFeature::IsUseable ( const FactorMask & mask ) const [virtual]

Implements Moses::FeatureFunction.

Definition at line 461 of file TargetNgramFeature.cpp.

void Moses::TargetNgramFeature::Load ( AllOptions::ptr const & opts ) [virtual]

override to load model files

Reimplemented from Moses::FeatureFunction.

Definition at line 77 of file TargetNgramFeature.cpp.

References BOS_, EOS_, Moses::FeatureFunction::m_options, and UTIL_THROW.

void Moses::TargetNgramFeature::SetParameter	(	const std::string &	key,
		const std::string &	value
	)			`[virtual]`

Reimplemented from Moses::FeatureFunction.

Definition at line 62 of file TargetNgramFeature.cpp.

References Moses::Scan< bool >().

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The documentation for this class was generated from the following files:

/disk4/html/www/moses/doxygen/mosesdecoder/moses/FF/TargetNgramFeature.h
/disk4/html/www/moses/doxygen/mosesdecoder/moses/FF/TargetNgramFeature.cpp


Public Member Functions
	TargetNgramFeature (const std::string &line)
void	Load (AllOptions::ptr const &opts)
	override to load model files
bool	IsUseable (const FactorMask &mask) const
virtual const FFState *	EmptyHypothesisState (const InputType &input) const
	return the state associated with the empty hypothesis for a given sentence
virtual FFState *	EvaluateWhenApplied (const Hypothesis &cur_hypo, const FFState prev_state, ScoreComponentCollection accumulator) const
	This interface should be implemented. Notes: When evaluating the value of this feature function, you should avoid calling hypo.GetPrevHypo(). If you need something from the "previous" hypothesis, you should store it in an FFState object which will be passed in as prev_state. If you don't do this, you will get in trouble.
virtual FFState *	EvaluateWhenApplied (const ChartHypothesis &cur_hypo, int featureId, ScoreComponentCollection *accumulator) const
void	SetParameter (const std::string &key, const std::string &value)