[jira] [Issue Comment Deleted] (TIKA-2439) Avoid NullPointerException in org.apache.tika.langdetect.OptimaizeLangDetector if models haven't been loaded

["Karl Richter (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TIKA-2439?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Karl Richter updated TIKA-2439:
-------------------------------
    Comment: was deleted

(was: There's even a comment `// TODO throw exception if models haven't been loaded, or auto-load all?`... https://github.com/apache/tika/pull/199)

> Avoid NullPointerException in org.apache.tika.langdetect.OptimaizeLangDetector if models haven't been loaded
> ------------------------------------------------------------------------------------------------------------
>
>                 Key: TIKA-2439
>                 URL: https://issues.apache.org/jira/browse/TIKA-2439
>             Project: Tika
>          Issue Type: Improvement
>          Components: languageidentifier
>    Affects Versions: 1.17
>            Reporter: Karl Richter
>
> In an intuitive usage of
> {code:java}
> LanguageDetector languageDetector = LanguageDetector.getDefaultLanguageDetector();
> List<LanguageResult> languageResults = languageDetector.detectAll(someNonEmptyString);
> {code}
> `org.apache.tika.langdetect.OptimaizeLangDetector` might/will (?) be chosen as default detector, but since there's no call to `LanguageDetector.loadModels()` `LanguageDetector.detector` is `null` in `detectAll` which causes an unhelpful error situation which one has to investigate in the code. A simple check whether `detector` is `null` and throwing an `IllegalStateException("models haven't been loaded yet (forgot to call loadModels?")` would be much more intuitive.
> If that corresponds to the expected behaviour (it's my first week with Tika), I can provide a patch or pull request.
> experienced with 1.16-75-g4455a6f08



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