Package org.apache.commons.text.similarity

Interface SimilarityScore<R>

Type Parameters:
R - The type of similarity score unit used by this EditDistance.
All Known Subinterfaces:
EditDistance<R>
All Known Implementing Classes:
CosineDistance, HammingDistance, IntersectionSimilarity, JaccardDistance, JaccardSimilarity, JaroWinklerDistance, JaroWinklerSimilarity, LevenshteinDetailedDistance, LevenshteinDistance, LongestCommonSubsequence, LongestCommonSubsequenceDistance
public interface SimilarityScore<R>
Interface for the concept of a string similarity score.

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

We Define a SimilarityScore to be a 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. We have omitted the explicit statement of extending BiFunction due to it only being implemented in Java 1.8, and we wish to maintain Java 1.7 compatibility.

Since:
1.0

  • Method Summary

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

  • Method Details

    • apply

      R apply​(CharSequence left, CharSequence right)
      Compares two CharSequences.
      Parameters:
      left - the first CharSequence
      right - the second CharSequence
      Returns:
      The similarity score between two CharSequences