A ranker scores a query against all the documents in an inverted index, returning a list of documents sorted by relevance. More...

#include <ranker.h>

Inheritance diagram for meta::index::ranker:

Public Member Functions
std::vector< std::pair< doc_id, double > >	score (inverted_index &idx, corpus::document &query, uint64_t num_results=10, const std::function< bool(doc_id d_id)> &filter=[](doc_id){return true;})

virtual double	score_one (const score_data &sd)=0
	Computes the contribution to the score of a document for a matched query term. More...

virtual double	initial_score (const score_data &sd) const
	Computes the constant contribution to the score of a particular document. More...

virtual	~ranker ()=default
	Default destructor.

Detailed Description

A ranker scores a query against all the documents in an inverted index, returning a list of documents sorted by relevance.

Member Function Documentation

std::vector< std::pair< doc_id, double > > meta::index::ranker::score	(	inverted_index &	idx,
		corpus::document &	query,
		uint64_t	num_results = `10`,
		const std::function< bool(doc_id d_id)> &	filter = `[](doc_id) { return true; }`
	)

Parameters

idx	The index this ranker is operating on
query	The current query
num_results	The number of results to return in the vector
filter	A filtering function to apply to each doc_id; returns true if the document should be included in results

virtual double meta::index::ranker::score_one ( const score_data & sd )

pure virtual

Computes the contribution to the score of a document for a matched query term.

Parameters

sd	The score_data for this query

double meta::index::ranker::initial_score ( const score_data & sd ) const

virtual

Computes the constant contribution to the score of a particular document.

Parameters

sd	The score_data for the query

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