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#ifndef moses_GlobalLexicalModel_h
#define moses_GlobalLexicalModel_h
#include <string>
#include <vector>
#include "Factor.h"
#include "Phrase.h"
#include "TypeDef.h"
#include "Util.h"
#include "WordsRange.h"
#include "ScoreProducer.h"
#include "FeatureFunction.h"
#include "FactorTypeSet.h"
#include "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
std::map< const TargetPhrase*, float > *m_cache;
const Sentence *m_input;
Word *m_bias;
FactorMask m_inputFactors;
FactorMask m_outputFactors;
void LoadData(const std::string &filePath,
const std::vector< FactorType >& inFactors,
const std::vector< FactorType >& outFactors);
float ScorePhrase( const TargetPhrase& targetPhrase ) const;
float GetFromCacheOrScorePhrase( const TargetPhrase& targetPhrase ) const;
public:
GlobalLexicalModel(const std::string &filePath,
const std::vector< FactorType >& inFactors,
const std::vector< FactorType >& outFactors);
virtual ~GlobalLexicalModel();
virtual std::string GetScoreProducerWeightShortName(unsigned) const {
return "lex";
};
void InitializeForInput( Sentence const& in );
void Evaluate(const TargetPhrase&, ScoreComponentCollection* ) const;
void EvaluateChart(
const ChartHypothesis& cur_hypo,
int featureID,
ScoreComponentCollection* accumulator) const
{
std::cerr << "EvaluateChart not implemented." << std::endl;
exit(1);
}
};
}
#endif
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