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#ifndef _TRANSLATOR_H_
#define _TRANSLATOR_H_
#include <string>
#include <vector>
#include <boost/shared_ptr.hpp>
#include <boost/program_options/variables_map.hpp>
class Hypergraph;
class SentenceMetadata;
class Translator {
public:
virtual ~Translator();
// returns true if goal reached, false otherwise
// minus_lm_forest will contain the unpruned forest. the
// feature values from the phrase table / grammar / etc
// should be in the forest already - the "late" features
// should not just copy values that are available without
// any context or computation.
// SentenceMetadata contains information about the sentence,
// but it is an input/output parameter since the Translator
// is also responsible for setting the value of src_len.
virtual bool Translate(const std::string& src,
SentenceMetadata* smeta,
const std::vector<double>& weights,
Hypergraph* minus_lm_forest) = 0;
};
class SCFGTranslatorImpl;
class SCFGTranslator : public Translator {
public:
SCFGTranslator(const boost::program_options::variables_map& conf);
bool Translate(const std::string& src,
SentenceMetadata* smeta,
const std::vector<double>& weights,
Hypergraph* minus_lm_forest);
private:
boost::shared_ptr<SCFGTranslatorImpl> pimpl_;
};
class FSTTranslatorImpl;
class FSTTranslator : public Translator {
public:
FSTTranslator(const boost::program_options::variables_map& conf);
bool Translate(const std::string& src,
SentenceMetadata* smeta,
const std::vector<double>& weights,
Hypergraph* minus_lm_forest);
private:
boost::shared_ptr<FSTTranslatorImpl> pimpl_;
};
#endif
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