org.apache.solr.search.function.distance

Class GeohashHaversineFunction

java.lang.Object

org.apache.lucene.queries.function.ValueSource

org.apache.solr.search.function.distance.GeohashHaversineFunction

public class GeohashHaversineFunction
extends org.apache.lucene.queries.function.ValueSource

Calculate the Haversine distance between two geo hash codes.

Ex: ghhsin(ValueSource, ValueSource, radius)

See Also:

for more details on the implementation

Constructor Summary

Constructors

Constructor and Description
GeohashHaversineFunction(org.apache.lucene.queries.function.ValueSource geoHash1, org.apache.lucene.queries.function.ValueSource geoHash2, double radius)

Method Summary

Modifier and Type	Method and Description
void	createWeight(Map context, org.apache.lucene.search.IndexSearcher searcher)
String	description()
protected double	distance(int doc, org.apache.lucene.queries.function.FunctionValues gh1DV, org.apache.lucene.queries.function.FunctionValues gh2DV)
boolean	equals(Object o)
org.apache.lucene.queries.function.FunctionValues	getValues(Map context, org.apache.lucene.index.AtomicReaderContext readerContext)
int	hashCode()
protected String	name()

Methods inherited from class org.apache.lucene.queries.function.ValueSource

getSortField, newContext, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

GeohashHaversineFunction

public GeohashHaversineFunction(org.apache.lucene.queries.function.ValueSource geoHash1,
                                org.apache.lucene.queries.function.ValueSource geoHash2,
                                double radius)

Method Detail

name

protected String name()

getValues

public org.apache.lucene.queries.function.FunctionValues getValues(Map context,
                                                                   org.apache.lucene.index.AtomicReaderContext readerContext)
                                                            throws IOException

Specified by:

getValues in class org.apache.lucene.queries.function.ValueSource

Throws:

IOException

distance

protected double distance(int doc,
                          org.apache.lucene.queries.function.FunctionValues gh1DV,
                          org.apache.lucene.queries.function.FunctionValues gh2DV)

createWeight

public void createWeight(Map context,
                         org.apache.lucene.search.IndexSearcher searcher)
                  throws IOException

Overrides:

createWeight in class org.apache.lucene.queries.function.ValueSource

Throws:

IOException

equals

public boolean equals(Object o)

Specified by:

equals in class org.apache.lucene.queries.function.ValueSource

hashCode

public int hashCode()

Specified by:

hashCode in class org.apache.lucene.queries.function.ValueSource

description

public String description()

Specified by:

description in class org.apache.lucene.queries.function.ValueSource