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