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

java.lang.Object
  extended by org.apache.lucene.queries.function.ValueSource
      extended by org.apache.solr.search.function.distance.GeohashHaversineFunction

public class GeohashHaversineFunction
extends 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
GeohashHaversineFunction(ValueSource geoHash1, ValueSource geoHash2, double radius)
           
 
Method Summary
 void createWeight(Map context, IndexSearcher searcher)
           
 String description()
           
protected  double distance(int doc, FunctionValues gh1DV, FunctionValues gh2DV)
           
 boolean equals(Object o)
           
 FunctionValues getValues(Map context, 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(ValueSource geoHash1,
                                ValueSource geoHash2,
                                double radius)
Method Detail

name

protected String name()

getValues

public FunctionValues getValues(Map context,
                                AtomicReaderContext readerContext)
                         throws IOException
Specified by:
getValues in class ValueSource
Throws:
IOException

distance

protected double distance(int doc,
                          FunctionValues gh1DV,
                          FunctionValues gh2DV)

createWeight

public void createWeight(Map context,
                         IndexSearcher searcher)
                  throws IOException
Overrides:
createWeight in class ValueSource
Throws:
IOException

equals

public boolean equals(Object o)
Specified by:
equals in class ValueSource

hashCode

public int hashCode()
Specified by:
hashCode in class ValueSource

description

public String description()
Specified by:
description in class ValueSource


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