mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-09-20 07:42:21 +03:00
100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
#ifndef moses_GlobalLexicalModel_h
|
|
#define moses_GlobalLexicalModel_h
|
|
|
|
#include <stdexcept>
|
|
#include <string>
|
|
#include <vector>
|
|
#include <memory>
|
|
#include "StatelessFeatureFunction.h"
|
|
#include "moses/Factor.h"
|
|
#include "moses/Phrase.h"
|
|
#include "moses/TypeDef.h"
|
|
#include "moses/Util.h"
|
|
#include "moses/WordsRange.h"
|
|
#include "moses/FactorTypeSet.h"
|
|
#include "moses/Sentence.h"
|
|
|
|
#ifdef WITH_THREADS
|
|
#include <boost/thread/tss.hpp>
|
|
#endif
|
|
|
|
namespace Moses
|
|
{
|
|
|
|
class Factor;
|
|
class Phrase;
|
|
class Hypothesis;
|
|
class InputType;
|
|
|
|
/** Discriminatively trained global lexicon model
|
|
* This is a implementation of Mauser et al., 2009's model that predicts
|
|
* each output word from _all_ the input words. The intuition behind this
|
|
* feature is that it uses context words for disambiguation
|
|
*/
|
|
class GlobalLexicalModel : public StatelessFeatureFunction
|
|
{
|
|
typedef std::map< const Word*, std::map< const Word*, float, WordComparer >, WordComparer > DoubleHash;
|
|
typedef std::map< const Word*, float, WordComparer > SingleHash;
|
|
typedef std::map< const TargetPhrase*, float > LexiconCache;
|
|
|
|
struct ThreadLocalStorage {
|
|
LexiconCache cache;
|
|
const Sentence *input;
|
|
};
|
|
|
|
private:
|
|
DoubleHash m_hash;
|
|
#ifdef WITH_THREADS
|
|
boost::thread_specific_ptr<ThreadLocalStorage> m_local;
|
|
#else
|
|
std::auto_ptr<ThreadLocalStorage> m_local;
|
|
#endif
|
|
Word *m_bias;
|
|
|
|
FactorMask m_inputFactors, m_outputFactors;
|
|
std::vector<FactorType> m_inputFactorsVec, m_outputFactorsVec;
|
|
std::string m_filePath;
|
|
|
|
void Load();
|
|
|
|
float ScorePhrase( const TargetPhrase& targetPhrase ) const;
|
|
float GetFromCacheOrScorePhrase( const TargetPhrase& targetPhrase ) const;
|
|
|
|
public:
|
|
GlobalLexicalModel(const std::string &line);
|
|
virtual ~GlobalLexicalModel();
|
|
|
|
void SetParameter(const std::string& key, const std::string& value);
|
|
|
|
void InitializeForInput( Sentence const& in );
|
|
|
|
bool IsUseable(const FactorMask &mask) const;
|
|
|
|
void Evaluate(const Hypothesis& hypo,
|
|
ScoreComponentCollection* accumulator) const;
|
|
|
|
|
|
void EvaluateChart(
|
|
const ChartHypothesis& hypo,
|
|
ScoreComponentCollection* accumulator) const {
|
|
throw std::logic_error("GlobalLexicalModel not supported in chart decoder, yet");
|
|
}
|
|
|
|
void Evaluate(const InputType &input
|
|
, const InputPath &inputPath
|
|
, const TargetPhrase &targetPhrase
|
|
, ScoreComponentCollection &scoreBreakdown
|
|
, ScoreComponentCollection *estimatedFutureScore = NULL) const
|
|
{}
|
|
void Evaluate(const Phrase &source
|
|
, const TargetPhrase &targetPhrase
|
|
, ScoreComponentCollection &scoreBreakdown
|
|
, ScoreComponentCollection &estimatedFutureScore) const
|
|
{}
|
|
|
|
|
|
};
|
|
|
|
}
|
|
#endif
|