[jira] [Created] (LUCENE-7536) ASCIIFoldingFilterFactory.getMultiTermComponent can emit two tokens

["Adrien Grand (JIRA)" <ji...@apache.org>]

Adrien Grand created LUCENE-7536:
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             Summary: ASCIIFoldingFilterFactory.getMultiTermComponent can emit two tokens
                 Key: LUCENE-7536
                 URL: https://issues.apache.org/jira/browse/LUCENE-7536
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Adrien Grand
            Priority: Minor


My understanding is that it is a requirement for multi-term analysis to only normalize tokens, and not eg. remove tokens (stop filter) or add tokens (by tokenizing or adding synonyms). Yet ASCIIFoldingFilterFactory.getMultiTermComponent will return a factory that emits synonyms if preserveOriginal is set to true on the original filter.

This looks like a bug to me but I'm not entirely sure how to fix it. Should the multi-term analysis component do ascii folding or not if the original factory has preserveOriginal set to true?



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