mosesdecoder/moses/src/ScoreProducer.h

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// $Id$

#ifndef moses_ScoreProducer_h
#define moses_ScoreProducer_h

#include <string>
#include <limits>

namespace Moses
{

class Hypothesis;
class ScoreComponentCollection;
class ScoreIndexManager;
class FFState;

class ScoreProducer
{
private:
  static unsigned int s_globalScoreBookkeepingIdCounter;
  unsigned int m_scoreBookkeepingId;

  ScoreProducer(const ScoreProducer&);  // don't implement

#define UNASSIGNED std::numeric_limits<unsigned int>::max()

protected:
  // it would be nice to force registration here, but some Producer objects
  // are constructed before they know how many scores they have
  ScoreProducer();
  virtual ~ScoreProducer();

public:
  unsigned int GetScoreBookkeepingID() const {
    return m_scoreBookkeepingId;
  }
  void CreateScoreBookkeepingID()       {
    m_scoreBookkeepingId = s_globalScoreBookkeepingIdCounter++;
  }
  virtual size_t GetNumScoreComponents() const = 0;

  virtual std::string GetScoreProducerDescription(unsigned idx=0) const = 0;

  virtual std::string GetScoreProducerWeightShortName(unsigned idx=0) const = 0;

  virtual size_t GetNumInputScores() const {
    return 0;
  };

  virtual bool IsStateless() const = 0;

};


}

#endif

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