mirror of
https://github.com/moses-smt/mosesdecoder.git
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114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
// $Id$
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#ifndef moses_DummyScoreProducers_h
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#define moses_DummyScoreProducers_h
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#include "FeatureFunction.h"
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namespace Moses
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{
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class WordsRange;
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/** Calculates Distortion scores
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*/
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class DistortionScoreProducer : public StatefulFeatureFunction
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{
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public:
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DistortionScoreProducer() : StatefulFeatureFunction("Distortion", 1) {}
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float CalculateDistortionScore(const Hypothesis& hypo,
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const WordsRange &prev, const WordsRange &curr, const int FirstGapPosition) const;
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std::string GetScoreProducerWeightShortName(unsigned) const;
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virtual const FFState* EmptyHypothesisState(const InputType &input) const;
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virtual FFState* Evaluate(
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const Hypothesis& cur_hypo,
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const FFState* prev_state,
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ScoreComponentCollection* accumulator) const;
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virtual FFState* EvaluateChart(
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const ChartHypothesis& /* cur_hypo */,
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int /* featureID - used to index the state in the previous hypotheses */,
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ScoreComponentCollection*) const {
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CHECK(0); // feature function not valid in chart decoder
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return NULL;
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}
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};
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/** Doesn't do anything but provide a key into the global
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* score array to store the word penalty in.
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*/
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class WordPenaltyProducer : public StatelessFeatureFunction
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{
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public:
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WordPenaltyProducer() : StatelessFeatureFunction("WordPenalty",1) {}
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std::string GetScoreProducerWeightShortName(unsigned) const;
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virtual void Evaluate(
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const PhraseBasedFeatureContext& context,
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ScoreComponentCollection* accumulator) const;
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virtual void EvaluateChart(
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const ChartBasedFeatureContext& context,
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ScoreComponentCollection* accumulator) const
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{
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//required but does nothing.
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}
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};
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/** unknown word penalty */
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class UnknownWordPenaltyProducer : public StatelessFeatureFunction
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{
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public:
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UnknownWordPenaltyProducer() : StatelessFeatureFunction("!UnknownWordPenalty",1) {}
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std::string GetScoreProducerWeightShortName(unsigned) const;
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virtual bool ComputeValueInTranslationOption() const;
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void Evaluate( const PhraseBasedFeatureContext& context,
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ScoreComponentCollection* accumulator) const
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{
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//do nothing - not a real feature
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}
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void EvaluateChart(
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const ChartBasedFeatureContext& context,
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ScoreComponentCollection* accumulator) const
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{
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//do nothing - not a real feature
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}
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bool ComputeValueInTranslationTable() const {return true;}
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};
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class MetaFeatureProducer : public StatelessFeatureFunction
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{
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public:
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MetaFeatureProducer(std::string shortName) : StatelessFeatureFunction("MetaFeature_"+shortName,1), m_shortName(shortName) {}
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std::string m_shortName;
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std::string GetScoreProducerWeightShortName(unsigned) const;
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void Evaluate(const PhraseBasedFeatureContext& context,
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ScoreComponentCollection* accumulator) const {
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//do nothing - not a real feature
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}
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void EvaluateChart(const ChartBasedFeatureContext& context,
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ScoreComponentCollection*) const {
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//do nothing - not a real feature
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}
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};
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}
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#endif
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