Package org.apache.commons.text.similarity

Interface SimilarityScore<R>

Type Parameters:
R - The type of similarity score unit.
All Superinterfaces:
BiFunction<CharSequence,CharSequence,R>, ObjectSimilarityScore<CharSequence,R>
All Known Subinterfaces:
EditDistance<R>
All Known Implementing Classes:
CosineDistance, HammingDistance, IntersectionSimilarity, JaccardDistance, JaccardSimilarity, JaroWinklerDistance, JaroWinklerSimilarity, LevenshteinDetailedDistance, LevenshteinDistance, LongestCommonSubsequence, LongestCommonSubsequenceDistance
public interface SimilarityScore<R> extends ObjectSimilarityScore<CharSequence,R>
Scores CharSequence similarity, like a String.

A string similarity score is intended to have some of the properties of a metric, yet allowing for exceptions, like the Jaro-Winkler similarity score.

A similarity score is the function d: [X * X] -&gt; [0, INFINITY) with the following properties:

  • d(x,y) &gt;= 0, non-negativity or separation axiom
  • d(x,y) == d(y,x), symmetry.

Notice, these are two of the properties that contribute to d being a metric.

Further, this intended to be BiFunction<CharSequence, CharSequence, R>. The apply method accepts a pair of CharSequence parameters and returns an R type similarity score.

Since:
1.0

  • Method Summary

    Modifier and Type
    Method
    Description
    R
    apply(CharSequence left, CharSequence right)
    Compares two CharSequences.

    Methods inherited from interface java.util.function.BiFunction

    andThen