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#ifndef _DECODER_H_
#define _DECODER_H_
#include <iostream>
#include <string>
#include <vector>
#include <boost/shared_ptr.hpp>
#include <boost/program_options/variables_map.hpp>
class SentenceMetadata;
struct Hypergraph;
struct DecoderImpl;
struct DecoderObserver {
virtual ~DecoderObserver();
virtual void NotifyDecodingStart(const SentenceMetadata& smeta);
virtual void NotifySourceParseFailure(const SentenceMetadata& smeta);
virtual void NotifyTranslationForest(const SentenceMetadata& smeta, Hypergraph* hg);
virtual void NotifyAlignmentFailure(const SentenceMetadata& semta);
virtual void NotifyAlignmentForest(const SentenceMetadata& smeta, Hypergraph* hg);
virtual void NotifyDecodingComplete(const SentenceMetadata& smeta);
};
struct Decoder {
Decoder(int argc, char** argv);
Decoder(std::istream* config_file);
bool Decode(const std::string& input, DecoderObserver* observer = NULL);
void SetWeights(const std::vector<double>& weights);
void SetId(int id);
~Decoder();
const boost::program_options::variables_map& GetConf() const { return conf; }
// add grammar rules (currently only supported by SCFG decoders)
// that will be used on subsequent calls to Decode. rules should be in standard
// text format. This function does NOT read from a file.
void SetSupplementalGrammar(const std::string& grammar);
void SetSentenceGrammar(const std::string& grammar);
private:
boost::program_options::variables_map conf;
boost::shared_ptr<DecoderImpl> pimpl_;
};
#endif
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