org.apache.lucene.search.spell
Class JaroWinklerDistance

java.lang.Object
  extended by org.apache.lucene.search.spell.JaroWinklerDistance
All Implemented Interfaces:
StringDistance

public class JaroWinklerDistance
extends Object
implements StringDistance


Constructor Summary
JaroWinklerDistance()
           
 
Method Summary
 float getDistance(String s1, String s2)
          Returns a float between 0 and 1 based on how similar the specified strings are to one another.
 float getThreshold()
          Returns the current value of the threshold used for adding the Winkler bonus.
 void setThreshold(float threshold)
          Sets the threshold used to determine when Winkler bonus should be used.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

JaroWinklerDistance

public JaroWinklerDistance()
Method Detail

getDistance

public float getDistance(String s1,
                         String s2)
Description copied from interface: StringDistance
Returns a float between 0 and 1 based on how similar the specified strings are to one another. Returning a value of 1 means the specified strings are identical and 0 means the string are maximally different.

Specified by:
getDistance in interface StringDistance
Parameters:
s1 - The first string.
s2 - The second string.
Returns:
a float between 0 and 1 based on how similar the specified strings are to one another.

setThreshold

public void setThreshold(float threshold)
Sets the threshold used to determine when Winkler bonus should be used. Set to a negative value to get the Jaro distance.

Parameters:
threshold - the new value of the threshold

getThreshold

public float getThreshold()
Returns the current value of the threshold used for adding the Winkler bonus. The default value is 0.7.

Returns:
the current value of the threshold


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