[jira] [Created] (TIKA-3207) Invalid language code in TesseractOCRConfig

["Daniel Smyda (Jira)" <ji...@apache.org>]

Daniel Smyda created TIKA-3207:
----------------------------------

             Summary: Invalid language code in TesseractOCRConfig
                 Key: TIKA-3207
                 URL: https://issues.apache.org/jira/browse/TIKA-3207
             Project: Tika
          Issue Type: Bug
          Components: ocr
    Affects Versions: 1.24.1
            Reporter: Daniel Smyda


Some language packs available on Tesseract's [github|https://github.com/tesseract-ocr/tessdata] support vertical orientations of Chinese. Trying to specify them via TesseractOCRConfig.setLanguage(String language) results in an exception because the regex is not expecting another underscore in the name.
{code:java}
    /**
     * Set tesseract language dictionary to be used. Default is "eng".     
     * Multiple languages may be specified, separated by plus characters.     
     * e.g. "chi_tra+chi_sim"
     */
    public void setLanguage(String language) {
        if (!language.matches("([a-zA-Z]{3}(_[a-zA-Z]{3,4})?(\\+?))+")
                || language.endsWith("+")) {
            throw new IllegalArgumentException("Invalid language code");
        }
        this.language = language;
    }
{code}
What is the reason behind validating language options?

Either way, I'd be more than happy to supply a patch. Thank you.



--
This message was sent by Atlassian Jira
(v8.3.4#803005)