mosesdecoder/mert/FeatureArray.h

/*
 *  FeatureArray.h
 *  mert - Minimum Error Rate Training
 *
 *  Created by Nicola Bertoldi on 13/05/08.
 *
 */

#ifndef MERT_FEATURE_ARRAY_H_
#define MERT_FEATURE_ARRAY_H_

#include <vector>
#include <iosfwd>
#include "FeatureStats.h"

const char FEATURES_TXT_BEGIN[] = "FEATURES_TXT_BEGIN_0";
const char FEATURES_TXT_END[] = "FEATURES_TXT_END_0";
const char FEATURES_BIN_BEGIN[] = "FEATURES_BIN_BEGIN_0";
const char FEATURES_BIN_END[] = "FEATURES_BIN_END_0";

class FeatureArray
{
private:
  // idx to identify the utterance. It can differ from
  // the index inside the vector.
  std::string m_index;
  featarray_t m_array;
  std::size_t m_num_features;
  std::string m_features;
  bool m_sparse_flag;

public:
  FeatureArray();
  ~FeatureArray();

  void clear() { m_array.clear(); }

  bool hasSparseFeatures() const { return m_sparse_flag; }

  std::string getIndex() const { return m_index; }
  void setIndex(const std::string& value) { m_index = value; }

  FeatureStats& get(std::size_t i) { return m_array.at(i); }
  const FeatureStats& get(std::size_t i) const { return m_array.at(i); }

  void add(FeatureStats& e) { m_array.push_back(e); }

  //ADDED BY TS
  void swap(std::size_t i, std::size_t j) {
    std::swap(m_array[i], m_array[j]);
  }

  void resize(std::size_t new_size) {
    m_array.resize(std::min(new_size, m_array.size()));
  }
  //END_ADDED

  void merge(FeatureArray& e);

  std::size_t size() const { return m_array.size(); }

  std::size_t NumberOfFeatures() const { return m_num_features; }
  void NumberOfFeatures(std::size_t v) { m_num_features = v; }

  std::string Features() const { return m_features; }
  void Features(const std::string& f) { m_features = f; }

  void savetxt(std::ostream* os);
  void savebin(std::ostream* os);
  void save(std::ostream* os, bool bin=false);
  void save(const std::string &file, bool bin=false);
  void save(bool bin=false);

  void loadtxt(std::istream* is, std::size_t n);
  void loadbin(std::istream* is, std::size_t n);
  void load(std::istream* is);
  void load(const std::string &file);

  bool check_consistency() const;
};

#endif  // MERT_FEATURE_ARRAY_H_