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// $Id$
#ifndef moses_ScoreProducer_h
#define moses_ScoreProducer_h
#include <set>
#include <string>
#include <vector>
#include "FeatureVector.h"
namespace Moses
{
/*
* @note do not confuse this with a producer/consumer pattern.
* this is not a producer in that sense.
*/
class ScoreProducer
{
private:
std::string m_description;
bool m_reportSparseFeatures;
size_t m_numScoreComponents;
//In case there's multiple producers with the same description
static std::multiset<std::string> description_counts;
ScoreProducer(const ScoreProducer&); // don't implement
protected:
ScoreProducer(const std::string& description, size_t numScoreComponents);
virtual ~ScoreProducer();
public:
static const size_t unlimited;
static void ResetDescriptionCounts() {
description_counts.clear();
}
//! returns the number of scores that a subclass produces.
//! For example, a language model conventionally produces 1, a translation table some arbitrary number, etc
//! sparse features returned unlimited
size_t GetNumScoreComponents() const {return m_numScoreComponents;}
//! returns a string description of this producer
const std::string& GetScoreProducerDescription() const {return m_description;}
//! returns the weight parameter name of this producer (used in n-best list)
virtual std::string GetScoreProducerWeightShortName(unsigned idx=0) const = 0;
//! returns the number of scores gathered from the input (0 by default)
virtual size_t GetNumInputScores() const {
return 0;
};
virtual bool IsStateless() const = 0;
void SetSparseFeatureReporting() { m_reportSparseFeatures = true; }
bool GetSparseFeatureReporting() const { return m_reportSparseFeatures; }
virtual float GetSparseProducerWeight() const { return 1; }
};
}
#endif
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