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Posted to dev@tika.apache.org by "Daniel Smyda (Jira)" <ji...@apache.org> on 2020/10/08 21:54:00 UTC

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

     [ https://issues.apache.org/jira/browse/TIKA-3207?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Daniel Smyda updated TIKA-3207:
-------------------------------
    Description: 
Some language packs available on Tesseract's [github|https://github.com/tesseract-ocr/tessdata] support vertical orientations of Chinese (chi_sim_vert and chi_tra_vert). 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.

  was:
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.


> 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
>            Priority: Minor
>
> Some language packs available on Tesseract's [github|https://github.com/tesseract-ocr/tessdata] support vertical orientations of Chinese (chi_sim_vert and chi_tra_vert). 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.



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