file-backed-loss-setter.H

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#ifndef RERANKER_FILE_BACKED_LOSS_SETTER_H_
#define RERANKER_FILE_BACKED_LOSS_SETTER_H_

#include <cstdlib>
#include <vector>

#include "abstract-file-backed-feature-extractor.H"

namespace reranker {

using std::vector;

class FileBackedLossSetter : public AbstractFileBackedFeatureExtractor {
 public:
  FileBackedLossSetter() : AbstractFileBackedFeatureExtractor() {
  }
  virtual ~FileBackedLossSetter() { }

  virtual void RegisterInitializers(Initializers &initializers) {
    token_idx_ = 0;
    initializers.Add("filename", &filename_);
    initializers.Add("token_idx", (int *)&token_idx_);
  }

  virtual void Init(const Environment *env, const string &arg) {
    is_ = new ifstream(filename_.c_str());
  }

  virtual void Extract(Candidate &candidate,
                       FeatureVector<int,double> &features);

  virtual void ExtractSymbolic(Candidate &candidate,
                               FeatureVector<string,double> &symbolic_features)
  {
  }
 private:
  // data members
  size_t token_idx_;
  vector<string> tokens_;
};

}  // namespace reranker

#endif