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Posted to issues@commons.apache.org by "Gary D. Gregory (Jira)" <ji...@apache.org> on 2026/02/16 23:47:00 UTC

[jira] [Updated] (CODEC-317) ColognePhonetic can create duplicate consecutive codes in some cases

     [ https://issues.apache.org/jira/browse/CODEC-317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gary D. Gregory updated CODEC-317:
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    Summary: ColognePhonetic can create duplicate consecutive codes in some cases  (was: ColognePhonetic can create duplicate codes in some cases)

> ColognePhonetic can create duplicate consecutive codes in some cases
> --------------------------------------------------------------------
>
>                 Key: CODEC-317
>                 URL: https://issues.apache.org/jira/browse/CODEC-317
>             Project: Commons Codec
>          Issue Type: Bug
>    Affects Versions: 1.15, 1.16.1
>            Reporter: DRUser123
>            Priority: Major
>
> h2. ColognePhonetic: Duplicate code in some cases
> When the character "H" or an intermediate vowel (not at the beginning of the string) is intercepted, the code should not be added to the output; however, the lastCode variable takes the value of the latter, and this generates a duplicate code recognition error. 
> The piece of code in question is *ColognePhonetic$CologneOutputBuffer.put(code) line 275 version 1.16.1 (tested also with 1.15).*
> {+}Example with Müller (correctly coded){+}:
> Char = 'M', code = 6, lastCode = null, output = '6'
> Char = 'U', code = 0, lastCode = 6, output = '6' (no intermediate zeros are added)
> Char = 'L', code = 5, lastCode = 0, output = '65'   
> Char = 'L', code = 5, lastCode = 5, output = '65' (no duplicate codes are added)
> Char = 'E', code = 0, lastCode = 5, output = '65' (no intermediate zeros are added)
> Char = 'R', code = 7, lastCode = 0, output = '657' 
> {+}Example with Mülhler (incorrectly coded){+}:
> Char = 'M', code = 6, lastCode = null, output = '6'
> Char = 'U', code = 0, lastCode = 6, output = '6' (no intermediate zeros are added)
> Char = 'L', code = 5, lastCode = 0, output = '65'   
> Char = 'H', code = -, lastCode = 5, output = '65' 
> Char = 'L', {*}code = 5, lastCode = -{*}, output = '655' ({*}Fails to identify duplicate code{*})
> Char = 'E', code = 0, lastCode = 5, output = '655' (No intermediate zeros are added)
> Char = 'R', code = 7, lastCode = 0, output = '6557' 
> {+}Example with Müleler (incorrectly coded){+}:
> Char = 'M', code = 6, lastCode = null, output = '6'
> Char = 'U', code = 0, lastCode = 6, output = '6' (no intermediate zeros are added)
> Char = 'L', code = 5, lastCode = 0, output = '65'   
> Char = 'E', code = 0, lastCode = 5, output = '65' (no intermediate zeros are added)
> Char = 'L', {*}code = 5, lastCode = 0{*}, output = '655' ({*}Fails to identify duplicate code{*})
> Char = 'E', code = 0, lastCode = 5, output = '655' (no intermediate zeros are added)
> Char = 'R', code = 7, lastCode = 0, output = '6557' 



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