KeyMaker subclass which sorts by distance from a latitude/longitude. More...
 Inheritance diagram for Xapian::LatLongDistanceKeyMaker:
 Inheritance diagram for Xapian::LatLongDistanceKeyMaker:| Public Member Functions | |
| LatLongDistanceKeyMaker (Xapian::valueno slot_, const LatLongCoords ¢re_, const LatLongMetric &metric_, double defdistance) | |
| Construct a LatLongDistanceKeyMaker.  More... | |
| LatLongDistanceKeyMaker (Xapian::valueno slot_, const LatLongCoords ¢re_, const LatLongMetric &metric_) | |
| Construct a LatLongDistanceKeyMaker.  More... | |
| LatLongDistanceKeyMaker (Xapian::valueno slot_, const LatLongCoords ¢re_) | |
| Construct a LatLongDistanceKeyMaker.  More... | |
| LatLongDistanceKeyMaker (Xapian::valueno slot_, const LatLongCoord ¢re_, const LatLongMetric &metric_, double defdistance) | |
| Construct a LatLongDistanceKeyMaker.  More... | |
| LatLongDistanceKeyMaker (Xapian::valueno slot_, const LatLongCoord ¢re_, const LatLongMetric &metric_) | |
| Construct a LatLongDistanceKeyMaker.  More... | |
| LatLongDistanceKeyMaker (Xapian::valueno slot_, const LatLongCoord ¢re_) | |
| Construct a LatLongDistanceKeyMaker.  More... | |
| std::string | operator() (const Xapian::Document &doc) const | 
| Build a key string for a Document.  More... | |
|  Public Member Functions inherited from Xapian::KeyMaker | |
| KeyMaker () | |
| Default constructor. | |
| virtual | ~KeyMaker () | 
| Virtual destructor, because we have virtual methods. | |
| KeyMaker * | release () | 
| Start reference counting this object.  More... | |
| const KeyMaker * | release () const | 
| Start reference counting this object.  More... | |
KeyMaker subclass which sorts by distance from a latitude/longitude.
Experimental - see https://xapian.org/docs/deprecation#experimental-features
Results are ordered by the distance from a fixed point, or list of points, calculated according to the metric supplied. If multiple points are supplied (either in the constructor, or in the coordinates stored in a document), the closest pointwise distance is used.
If a document contains no coordinate stored in the specified slot, a special value for the distance will be used. This defaults to a large number, so that such results get a low rank, but may be specified by a constructor parameter.
| 
 | inline | 
Construct a LatLongDistanceKeyMaker.
| slot_ | Value slot to use. | 
| centre_ | List of points to calculate distance from (closest distance is used). | 
| metric_ | LatLongMetric to use. | 
| defdistance | Distance to use for docs with no value set. | 
| 
 | inline | 
Construct a LatLongDistanceKeyMaker.
| slot_ | Value slot to use. | 
| centre_ | List of points to calculate distance from (closest distance is used). | 
| metric_ | LatLongMetric to use. | 
Documents where no value is set are assumed to be a large distance away.
| 
 | inline | 
Construct a LatLongDistanceKeyMaker.
| slot_ | Value slot to use. | 
| centre_ | List of points to calculate distance from (closest distance is used). | 
Xapian::GreatCircleMetric is used as the metric.
Documents where no value is set are assumed to be a large distance away.
| 
 | inline | 
Construct a LatLongDistanceKeyMaker.
| slot_ | Value slot to use. | 
| centre_ | Point to calculate distance from. | 
| metric_ | LatLongMetric to use. | 
| defdistance | Distance to use for docs with no value set. | 
References Xapian::LatLongCoords::append().
| 
 | inline | 
Construct a LatLongDistanceKeyMaker.
| slot_ | Value slot to use. | 
| centre_ | Point to calculate distance from. | 
| metric_ | LatLongMetric to use. | 
Documents where no value is set are assumed to be a large distance away.
References Xapian::LatLongCoords::append().
| 
 | inline | 
Construct a LatLongDistanceKeyMaker.
| slot_ | Value slot to use. | 
| centre_ | Point to calculate distance from. | 
Xapian::GreatCircleMetric is used as the metric.
Documents where no value is set are assumed to be a large distance away.
References Xapian::LatLongCoords::append().
| 
 | virtual | 
Build a key string for a Document.
These keys can be used for sorting or collapsing matching documents.
| doc | Document object to build a key for. | 
Implements Xapian::KeyMaker.