CollapseData Class Reference

Class tracking information for a given value of the collapse key. More...

#include <collapser.h>

Collaboration diagram for CollapseData:

Public Member Functions
	CollapseData (const Xapian::Internal::MSetItem &item)
	Construct with the given MSetItem item. More...
collapse_result	add_item (const Xapian::Internal::MSetItem &item, Xapian::doccount collapse_max, MSetCmp mcmp, Xapian::Internal::MSetItem &old_item)
	Handle a new MSetItem with this collapse key value. More...
double	get_next_best_weight () const
	The highest weight of a document we've rejected. More...
Xapian::doccount	get_collapse_count () const
	The number of documents we've rejected. More...

Private Attributes
std::vector< Xapian::Internal::MSetItem >	items
	Currently kept MSet entries for this value of the collapse key. More...
double	next_best_weight
	The highest weight of a document we've rejected. More...
Xapian::doccount	collapse_count
	The number of documents we've rejected. More...

Detailed Description

Class tracking information for a given value of the collapse key.

Definition at line 41 of file collapser.h.

Constructor & Destructor Documentation

CollapseData()

CollapseData::CollapseData ( const Xapian::Internal::MSetItem &  item )

inlineexplicit

Construct with the given MSetItem item.

Definition at line 60 of file collapser.h.

References add_item().

Member Function Documentation

add_item()

collapse_result CollapseData::add_item	(	const Xapian::Internal::MSetItem &	item,
		Xapian::doccount	collapse_max,
		MSetCmp	mcmp,
		Xapian::Internal::MSetItem &	old_item
	)

Handle a new MSetItem with this collapse key value.

Parameters

	item	The new item.
	collapse_max	Max no. of items for each collapse key value.
	mcmp	MSetItem comparison functor.
[out]	old_item	Replaced item (when REPLACED is returned).

Returns

How item was handled: ADDED, REJECTED or REPLACED.

Definition at line 32 of file collapser.cc.

References ADDED, REJECTED, REPLACED, and Xapian::Internal::MSetItem::wt.

Referenced by CollapseData(), and Collapser::process().

get_collapse_count()

Xapian::doccount CollapseData::get_collapse_count ( ) const

inline

The number of documents we've rejected.

Definition at line 83 of file collapser.h.

References collapse_count.

Referenced by Collapser::operator bool().

get_next_best_weight()

double CollapseData::get_next_best_weight ( ) const

inline

The highest weight of a document we've rejected.

Definition at line 80 of file collapser.h.

References next_best_weight.

Member Data Documentation

collapse_count

Xapian::doccount CollapseData::collapse_count

private

The number of documents we've rejected.

Definition at line 56 of file collapser.h.

Referenced by get_collapse_count().

items

std::vector<Xapian::Internal::MSetItem> CollapseData::items

private

Currently kept MSet entries for this value of the collapse key.

If collapse_max > 1, then this is a min-heap once collapse_count > 0.

FIXME: We expect collapse_max to be small, so perhaps we should preallocate space for that many entries and/or allocate space in larger blocks to divvy up?

Definition at line 50 of file collapser.h.

next_best_weight

double CollapseData::next_best_weight

private

The highest weight of a document we've rejected.

Definition at line 53 of file collapser.h.

Referenced by get_next_best_weight().

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

• matcher/collapser.h
• matcher/collapser.cc