Moses::DistortionScoreProducer Class Reference

#include <DummyScoreProducers.h>

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List of all members.

Public Member Functions
	DistortionScoreProducer (ScoreIndexManager &scoreIndexManager)
float	CalculateDistortionScore (const Hypothesis &hypo, const WordsRange &prev, const WordsRange &curr, const int FirstGapPosition) const
size_t	GetNumScoreComponents () const
std::string	GetScoreProducerDescription () const
	returns a string description of this producer
std::string	GetScoreProducerWeightShortName () const
	returns the weight parameter name of this producer (used in n-best list)
size_t	GetNumInputScores () const
	returns the number of scores gathered from the input (0 by default)
virtual const FFState *	EmptyHypothesisState (const InputType &input) const
	return the state associated with the empty hypothesis for a given sentence
virtual FFState *	Evaluate (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.

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Detailed Description

Calculates Distortion scores

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Constructor & Destructor Documentation

Moses::DistortionScoreProducer::DistortionScoreProducer

(

ScoreIndexManager &

scoreIndexManager

)

References Moses::ScoreIndexManager::AddScoreProducer().

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Member Function Documentation

float Moses::DistortionScoreProducer::CalculateDistortionScore	(	const Hypothesis &	hypo,
		const WordsRange &	prev,
		const WordsRange &	curr,
		const int	FirstGapPosition
	)			const

References Moses::InputType::ComputeDistortionDistance(), Moses::WordsRange::GetEndPos(), Moses::Hypothesis::GetInput(), Moses::WordsRange::GetNumWordsBetween(), Moses::WordsRange::GetNumWordsCovered(), and Moses::WordsRange::GetStartPos().

Referenced by Evaluate(), and Moses::HypothesisScoreOrdererWithDistortion::operator()().

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const FFState * Moses::DistortionScoreProducer::EmptyHypothesisState

(

const InputType &

input

)

const [virtual]

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

Implements Moses::StatefulFeatureFunction.

References Moses::InputType::m_frontSpanCoveredLength, and NOT_FOUND.

FFState * Moses::DistortionScoreProducer::Evaluate	(	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.

References CalculateDistortionScore(), Moses::DistortionState_traditional::first_gap, Moses::Hypothesis::GetCurrSourceWordsRange(), Moses::WordsBitmap::GetFirstGapPos(), Moses::Hypothesis::GetPrevHypo(), Moses::Hypothesis::GetWordsBitmap(), Moses::ScoreComponentCollection::PlusEquals(), and Moses::DistortionState_traditional::range.

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size_t Moses::DistortionScoreProducer::GetNumInputScores

(

)

const [virtual]

returns the number of scores gathered from the input (0 by default)

Reimplemented from Moses::ScoreProducer.

size_t Moses::DistortionScoreProducer::GetNumScoreComponents

(

)

const [virtual]

returns the number of scores that a subclass produces. For example, a language model conventionally produces 1, a translation table some arbitrary number, etc

Implements Moses::ScoreProducer.

std::string Moses::DistortionScoreProducer::GetScoreProducerDescription

(

)

const [virtual]

returns a string description of this producer

Implements Moses::ScoreProducer.

std::string Moses::DistortionScoreProducer::GetScoreProducerWeightShortName

(

)

const [virtual]

returns the weight parameter name of this producer (used in n-best list)

Implements Moses::ScoreProducer.

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

• moses/src/DummyScoreProducers.h
• moses/src/DummyScoreProducers.cpp