Tim Allison created TIKA-3298:
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Summary: Add a "preloadLangs" parameter to TesseractOCRParser
Key: TIKA-3298
URL: https://issues.apache.org/jira/browse/TIKA-3298
Project: Tika
Issue Type: Task
Reporter: Tim Allison
[~peterkronenberg] on the user/dev lists and on TIKA-3297 and TIKA-3296 has
observed that the tesseract error message for "lang data doesn't exist" is not
extremely clear. We could add a "preloadLangs" option to TesseractOCRParser
(default would be {{false}}). If set to true, the parser (upon initialization)
if it finds tesseract, will call {{tesseract --list-langs}} and then store
those langs. At parse time, if the langs set has anything in it, the
TesseractOCRParser will check that set against the user-requested language and
throw a clearer exception to the user that the language data doesn't exist for
the requested language.
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