[jira] [Updated] (LUCENE-8125) emoji sequence support in ICUTokenizer

["Robert Muir (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-8125?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Muir updated LUCENE-8125:
--------------------------------
    Attachment: LUCENE-8125.patch

Here's a patch. I did more cleanup of outdated breakiterator stuff while I was here. Its not needed after the ICU upgrade (LUCENE-8122).

I added some simple tests, e.g. sequences such as 👩‍❤️‍👩 (WOMAN + ZWJ + HEAVY BLACK HEART + VARIATION SELECTOR-16 + ZWJ + WOMAN) are recognized as one token because the rules already knew that. 

the filters we have such as ICUNormalizer2Filter/ICUFoldingFilter would reduce the above to WOMAN + HEAVY BLACK HEART + WOMAN, because they remove the default ignorables.

> emoji sequence support in ICUTokenizer
> --------------------------------------
>
>                 Key: LUCENE-8125
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8125
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Robert Muir
>         Attachments: LUCENE-8125.patch
>
>
> uax29 word break rules already know how to handle these correctly, we just need to assign them a token type. 
> This is better than users trying to do this with custom rules (e.g. LUCENE-7916) because they are script-independent (common/inherited).



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