jubatus::core::fv_converter::feature_hasher Class Reference

#include <feature_hasher.hpp>

Collaboration diagram for jubatus::core::fv_converter::feature_hasher:

Public Member Functions
	feature_hasher (uint64_t max)
void	hash_feature_keys (common::sfv_t &fv) const

Private Attributes
uint64_t	max_size_

Detailed Description

Definition at line 27 of file feature_hasher.hpp.

Constructor & Destructor Documentation

jubatus::core::fv_converter::feature_hasher::feature_hasher ( uint64_t  max )

explicit

Definition at line 30 of file feature_hasher.cpp.

References JUBATUS_EXCEPTION.

    : max_size_(max) {
  if (max == 0) {
    throw JUBATUS_EXCEPTION(
        converter_exception("feature max size must be positive"));
  }
}

Member Function Documentation

void jubatus::core::fv_converter::feature_hasher::hash_feature_keys

(

common::sfv_t &

fv

)

const

Definition at line 38 of file feature_hasher.cpp.

References jubatus::core::common::hash_util::calc_string_hash(), and max_size_.

                                                            {
  for (size_t i = 0, size = fv.size(); i < size; ++i) {
    uint64_t id = common::hash_util::calc_string_hash(fv[i].first) % max_size_;
    fv[i].first = jubatus::util::lang::lexical_cast<std::string>(id);
  }
}

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Member Data Documentation

uint64_t jubatus::core::fv_converter::feature_hasher::max_size_

private

Definition at line 34 of file feature_hasher.hpp.

Referenced by hash_feature_keys().

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The documentation for this class was generated from the following files:

• jubatus/core/fv_converter/feature_hasher.hpp
• jubatus/core/fv_converter/feature_hasher.cpp