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60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
//
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// StatisticsBasedScorer.h
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// mert_lib
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//
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// Created by Hieu Hoang on 23/06/2012.
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// Copyright 2012 __MyCompanyName__. All rights reserved.
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//
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#ifndef mert_lib_StatisticsBasedScorer_h
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#define mert_lib_StatisticsBasedScorer_h
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#include "Scorer.h"
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#include "util/exception.hh"
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namespace MosesTuning
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{
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/**
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* Abstract base class for Scorers that work by adding statistics across all
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* outout sentences, then apply some formula, e.g., BLEU, PER.
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*/
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class StatisticsBasedScorer : public Scorer
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{
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friend class HopeFearDecoder;
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public:
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StatisticsBasedScorer(const std::string& name, const std::string& config);
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virtual ~StatisticsBasedScorer() {}
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virtual void score(const candidates_t& candidates, const diffs_t& diffs,
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statscores_t& scores) const;
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protected:
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enum RegularisationType {
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NONE,
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AVERAGE,
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MINIMUM
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};
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/**
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* Calculate the actual score.
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*/
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virtual statscore_t calculateScore(const std::vector<ScoreStatsType>& totals) const = 0;
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virtual float getReferenceLength(const std::vector<ScoreStatsType>& totals) const {
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UTIL_THROW(util::Exception, "getReferenceLength not implemented for this scorer type.");
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return 0;
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}
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// regularisation
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RegularisationType m_regularization_type;
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std::size_t m_regularization_window;
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};
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} // namespace
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#endif
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