[jira] [Updated] (LANG-936) StringUtils.getLevenshteinDistance with too big of a threshold returns wrong result

["Benedikt Ritter (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LANG-936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benedikt Ritter updated LANG-936:
---------------------------------

    Fix Version/s: Patch Needed

> StringUtils.getLevenshteinDistance with too big of a threshold returns wrong result
> -----------------------------------------------------------------------------------
>
>                 Key: LANG-936
>                 URL: https://issues.apache.org/jira/browse/LANG-936
>             Project: Commons Lang
>          Issue Type: Bug
>          Components: lang.*
>    Affects Versions: 3.1
>            Reporter: Yaniv Kunda
>            Priority: Minor
>             Fix For: Patch Needed
>
>
> StringUtils.getLevenshteinDistance(CharSequence s, CharSequence t, int threshold) specifies:
> {quote}
> {{Find the Levenshtein distance between two Strings if it's _+*less than or equal to*+_ a given threshold.}}
> {quote}
> When passing a threshold > *Integer.MAX_VALUE - max(s.length(), t.length())* the method always returns -1.
> The simplest use case is passing *Integer.MAX_VALUE* (a common practice if one would want to find the min/max LD of a string to several other strings in an iterative fashion.
> The code should be fixed to consider the threshold in relation to the source/target lengths, or alternatively the javadoc should be fixed to pronounce the current limit.



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