David Smiley created LUCENE-7342:
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Summary: WordDelimiterFilter should observe KeywordAttribute to
pass these tokens through
Key: LUCENE-7342
URL: https://issues.apache.org/jira/browse/LUCENE-7342
Project: Lucene - Core
Issue Type: Improvement
Components: modules/analysis
Reporter: David Smiley
I have a text analysis requirement in which I want certain tokens to not be
processed by WordDelimiterFilter -- i.e. they should pass through that filter.
WDF, like several other TokenFilters, has a configurable word list but this
list is static producing a concrete CharArraySet. Thus, for example, I can't
filter by a regexp nor can I filter based on other attributes.
A simple solution that makes sense to me is to have WDF use KeywordAttribute to
know if it should skip the token. KeywordAttribute seems fairly generic as to
how it can be used, although granted today it's only used by the stemmers.
That attribute isn't named "StemmerIgnoreAttribute" or some-such; it's generic
so I think it's fine for WDF to use it in a similar way.
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