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https://github.com/moses-smt/mosesdecoder.git
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95 lines
2.9 KiB
C++
95 lines
2.9 KiB
C++
#ifndef moses_WordTranslationFeature_h
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#define moses_WordTranslationFeature_h
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#include <string>
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#include <map>
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#include "FeatureFunction.h"
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#include "FactorCollection.h"
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#include "Sentence.h"
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#include "FFState.h"
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namespace Moses
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{
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/** Sets the features for word translation
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*/
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class WordTranslationFeature : public StatelessFeatureFunction {
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typedef std::map< char, short > CharHash;
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typedef std::vector< std::set<std::string> > DocumentVector;
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private:
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std::set<std::string> m_vocabSource;
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std::set<std::string> m_vocabTarget;
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DocumentVector m_vocabDomain;
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FactorType m_factorTypeSource;
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FactorType m_factorTypeTarget;
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bool m_unrestricted;
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bool m_simple;
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bool m_sourceContext;
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bool m_targetContext;
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bool m_domainTrigger;
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float m_sparseProducerWeight;
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bool m_ignorePunctuation;
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CharHash m_punctuationHash;
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public:
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WordTranslationFeature(FactorType factorTypeSource, FactorType factorTypeTarget,
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bool simple, bool sourceContext, bool targetContext, bool ignorePunctuation,
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bool domainTrigger):
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StatelessFeatureFunction("wt", ScoreProducer::unlimited),
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m_factorTypeSource(factorTypeSource),
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m_factorTypeTarget(factorTypeTarget),
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m_unrestricted(true),
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m_simple(simple),
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m_sourceContext(sourceContext),
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m_targetContext(targetContext),
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m_domainTrigger(domainTrigger),
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m_sparseProducerWeight(1),
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m_ignorePunctuation(ignorePunctuation)
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{
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std::cerr << "Initializing word translation feature.. ";
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if (m_simple == 1) std::cerr << "using simple word translations.. ";
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if (m_sourceContext == 1) std::cerr << "using source context.. ";
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if (m_targetContext == 1) std::cerr << "using target context.. ";
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if (m_domainTrigger == 1) std::cerr << "using domain triggers.. ";
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// compile a list of punctuation characters
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if (m_ignorePunctuation) {
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std::cerr << "ignoring punctuation for triggers.. ";
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char punctuation[] = "\"'!?¿·()#_,.:;•&@‑/\\0123456789~=";
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for (size_t i=0; i < sizeof(punctuation)-1; ++i)
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m_punctuationHash[punctuation[i]] = 1;
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}
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std::cerr << "done." << std::endl;
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}
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bool Load(const std::string &filePathSource, const std::string &filePathTarget);
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const FFState* EmptyHypothesisState(const InputType &) const {
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return new DummyState();
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}
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void Evaluate(const PhraseBasedFeatureContext& context,
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ScoreComponentCollection* accumulator) const;
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void EvaluateChart(const ChartBasedFeatureContext& context,
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ScoreComponentCollection* accumulator) const;
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// basic properties
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std::string GetScoreProducerWeightShortName(unsigned) const { return "wt"; }
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size_t GetNumInputScores() const { return 0; }
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bool ComputeValueInTranslationOption() const {return true;}
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void SetSparseProducerWeight(float weight) { m_sparseProducerWeight = weight; }
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float GetSparseProducerWeight() const { return m_sparseProducerWeight; }
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};
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}
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#endif // moses_WordTranslationFeature_h
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