#include <enquire.h>
Inheritance diagram for Xapian::Weight:
Public Member Functions | |
Weight * | create (const Internal *internal_, Xapian::doclength querysize_, Xapian::termcount wqf_, std::string tname_) const |
Create a new weight object of the same type as this and initialise it with the specified statistics. | |
virtual std::string | name () const =0 |
Name of the weighting scheme. | |
virtual std::string | serialise () const =0 |
Serialise object parameters into a string. | |
virtual Weight * | unserialise (const std::string &s) const =0 |
Create object given string serialisation returned by serialise(). | |
virtual Xapian::weight | get_sumpart (Xapian::termcount wdf, Xapian::doclength len) const =0 |
Get a weight which is part of the sum over terms being performed. | |
virtual Xapian::weight | get_maxpart () const =0 |
Gets the maximum value that get_sumpart() may return. | |
virtual Xapian::weight | get_sumextra (Xapian::doclength len) const =0 |
Get an extra weight for a document to add to the sum calculated over the query terms. | |
virtual Xapian::weight | get_maxextra () const =0 |
Gets the maximum value that get_sumextra() may return. | |
virtual bool | get_sumpart_needs_doclength () const |
return false if the weight object doesn't need doclength | |
Protected Member Functions | |
Weight (const Weight &) | |
Protected Attributes | |
const Internal * | internal |
Xapian::doclength | querysize |
Xapian::termcount | wqf |
std::string | tname |
Friends | |
class | Enquire |
class | ::SocketServer |
|
Create a new weight object of the same type as this and initialise it with the specified statistics. You shouldn't call this method yourself - it's called by Enquire.
|
|
Gets the maximum value that get_sumextra() may return. This is used in optimising searches. Implemented in Xapian::BoolWeight, Xapian::BM25Weight, and Xapian::TradWeight. |
|
Gets the maximum value that get_sumpart() may return. This is used in optimising searches, by having the postlist tree decay appropriately when parts of it can have limited, or no, further effect. Implemented in Xapian::BoolWeight, Xapian::BM25Weight, and Xapian::TradWeight. |
|
Get an extra weight for a document to add to the sum calculated over the query terms. This returns a weight for a given document, and is used by some weighting schemes to account for influence such as document length.
Implemented in Xapian::BoolWeight, Xapian::BM25Weight, and Xapian::TradWeight. |
|
Get a weight which is part of the sum over terms being performed. This returns a weight for a given term and document. These weights are summed to give a total weight for the document.
Implemented in Xapian::BoolWeight, Xapian::BM25Weight, and Xapian::TradWeight. |
|
return false if the weight object doesn't need doclength
Reimplemented in Xapian::BoolWeight, Xapian::BM25Weight, and Xapian::TradWeight. |
|
Name of the weighting scheme. If the subclass is called FooWeight, this should return "Foo". Implemented in Xapian::BoolWeight, Xapian::BM25Weight, and Xapian::TradWeight. |
|
Serialise object parameters into a string.
Implemented in Xapian::BoolWeight, Xapian::BM25Weight, and Xapian::TradWeight. |
|
Create object given string serialisation returned by serialise().
Implemented in Xapian::BoolWeight, Xapian::BM25Weight, and Xapian::TradWeight. |