jubatus::core::burst::intersection_helper Class Reference

#include <window_intersection.hpp>

Collaboration diagram for jubatus::core::burst::intersection_helper:

Public Member Functions
int	adjust_index (int index) const
int	get_index_ (double pos) const
int	get_index_for_boundary (double boundary_pos) const
template<class Window >
std::pair< int, int >	get_intersection (const Window &w) const
bool	has_batch_interval_equals_to (double interval1) const
	intersection_helper (double start_pos=0, double batch_interval=1, int batch_size=0)
template<class Window >
	intersection_helper (const Window &w)
bool	position_near (double pos0, double pos1) const

Static Public Member Functions
static int	no_index ()

Private Attributes
double	batch_interval_
int	batch_size_
double	start_pos_

Detailed Description

Definition at line 40 of file window_intersection.hpp.

Constructor & Destructor Documentation

jubatus::core::burst::intersection_helper::intersection_helper ( double  start_pos = 0, double  batch_interval = 1, int  batch_size = 0  )

inlineexplicit

Definition at line 42 of file window_intersection.hpp.

      : start_pos_(start_pos),
        batch_interval_(batch_interval),
        batch_size_(batch_size) {
  }

template<class Window >

jubatus::core::burst::intersection_helper::intersection_helper ( const Window &  w )

inlineexplicit

Definition at line 51 of file window_intersection.hpp.

      : start_pos_(w.get_start_pos()),
        batch_interval_(w.get_batch_interval()),
        batch_size_(w.get_batch_size()) {
  }

Member Function Documentation

int jubatus::core::burst::intersection_helper::adjust_index ( int  index ) const

inline

Definition at line 97 of file window_intersection.hpp.

References batch_size_.

Referenced by get_intersection().

                                    {
    if (index < 0) {
      return 0;
    } else if (index > batch_size_) {
      return batch_size_;
    } else {
      return index;
    }
  }

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int jubatus::core::burst::intersection_helper::get_index_ ( double  pos ) const

inline

Definition at line 107 of file window_intersection.hpp.

References batch_interval_, and start_pos_.

Referenced by get_index_for_boundary().

                                   {
    return static_cast<int>(std::floor((pos - start_pos_) / batch_interval_));
  }

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int jubatus::core::burst::intersection_helper::get_index_for_boundary ( double  boundary_pos ) const

inline

Definition at line 73 of file window_intersection.hpp.

References batch_interval_, get_index_(), no_index(), position_near(), and start_pos_.

Referenced by get_intersection().

                                                        {
    int candidate = get_index_(boundary_pos + batch_interval_/2);
    double candidate_pos = start_pos_ + candidate * batch_interval_;
    if (!position_near(boundary_pos, candidate_pos)) {
      return no_index();
    }
    return candidate;
  }

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template<class Window >

std::pair<int, int> jubatus::core::burst::intersection_helper::get_intersection ( const Window &  w ) const

inline

Definition at line 58 of file window_intersection.hpp.

References adjust_index(), get_index_for_boundary(), has_batch_interval_equals_to(), and no_index().

Referenced by jubatus::core::burst::get_intersection().

                                                            {
    int begin = get_index_for_boundary(w.get_start_pos());
    int end = get_index_for_boundary(w.get_end_pos());

    if (begin == no_index() ||
        end == no_index() ||
        !has_batch_interval_equals_to(w.get_batch_interval())) {
      // nonsense data is given (should throw an exception?)
      return std::make_pair(no_index(), no_index());
    }

    return std::make_pair(adjust_index(begin),
                          adjust_index(end));
  }

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bool jubatus::core::burst::intersection_helper::has_batch_interval_equals_to ( double  interval1 ) const

inline

Definition at line 91 of file window_intersection.hpp.

References batch_interval_, batch_size_, and position_near().

Referenced by get_intersection(), and jubatus::core::burst::burst_result::has_same_batch_interval().

                                                            {
    // comparing end_pos
    size_t n = (std::max)(batch_size_, 1);
    return position_near(n * interval1, n * batch_interval_);
  }

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static int jubatus::core::burst::intersection_helper::no_index ( )

inlinestatic

Definition at line 83 of file window_intersection.hpp.

Referenced by get_index_for_boundary(), and get_intersection().

                        {  // constexpr is needed
    return std::numeric_limits<int>::min();
  }

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bool jubatus::core::burst::intersection_helper::position_near ( double  pos0, double  pos1  ) const

inline

Definition at line 87 of file window_intersection.hpp.

References batch_interval_, and jubatus::core::burst::window_position_near().

Referenced by get_index_for_boundary(), and has_batch_interval_equals_to().

                                                     {
    return window_position_near(pos0, pos1, batch_interval_);
  }

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Member Data Documentation

double jubatus::core::burst::intersection_helper::batch_interval_

private

Definition at line 113 of file window_intersection.hpp.

Referenced by get_index_(), get_index_for_boundary(), has_batch_interval_equals_to(), and position_near().

int jubatus::core::burst::intersection_helper::batch_size_

private

Definition at line 114 of file window_intersection.hpp.

Referenced by adjust_index(), and has_batch_interval_equals_to().

double jubatus::core::burst::intersection_helper::start_pos_

private

Definition at line 112 of file window_intersection.hpp.

Referenced by get_index_(), and get_index_for_boundary().

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

• jubatus/core/burst/window_intersection.hpp