mosesdecoder/moses/FF/DistortionScoreProducer.h
2015-01-14 11:07:42 +00:00

70 lines
2.2 KiB
C++

#pragma once
#include <stdexcept>
#include <string>
#include "StatefulFeatureFunction.h"
namespace Moses
{
class FFState;
class ScoreComponentCollection;
class Hypothesis;
class ChartHypothesis;
class WordsRange;
/** Calculates Distortion scores
*/
class DistortionScoreProducer : public StatefulFeatureFunction
{
protected:
static std::vector<const DistortionScoreProducer*> s_staticColl;
public:
static const std::vector<const DistortionScoreProducer*>& GetDistortionFeatureFunctions() {
return s_staticColl;
}
DistortionScoreProducer(const std::string &line);
bool IsUseable(const FactorMask &mask) const {
return true;
}
static float CalculateDistortionScore(const Hypothesis& hypo,
const WordsRange &prev, const WordsRange &curr, const int FirstGapPosition);
virtual const FFState* EmptyHypothesisState(const InputType &input) const;
virtual FFState* EvaluateWhenApplied(
const Hypothesis& cur_hypo,
const FFState* prev_state,
ScoreComponentCollection* accumulator) const;
virtual FFState* EvaluateWhenApplied(
const ChartHypothesis& /* cur_hypo */,
int /* featureID - used to index the state in the previous hypotheses */,
ScoreComponentCollection*) const {
throw std::logic_error("DistortionScoreProducer not supported in chart decoder, yet");
}
void EvaluateWithSourceContext(const InputType &input
, const InputPath &inputPath
, const TargetPhrase &targetPhrase
, const StackVec *stackVec
, ScoreComponentCollection &scoreBreakdown
, ScoreComponentCollection *estimatedFutureScore = NULL) const {
}
void EvaluateTranslationOptionListWithSourceContext(const InputType &input
, const TranslationOptionList &translationOptionList) const {
}
void EvaluateInIsolation(const Phrase &source
, const TargetPhrase &targetPhrase
, ScoreComponentCollection &scoreBreakdown
, ScoreComponentCollection &estimatedFutureScore) const {
}
};
}