Mike Sokolov created LUCENE-5620:
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Summary: LowerCaseFilter.preserveOriginal
Key: LUCENE-5620
URL: https://issues.apache.org/jira/browse/LUCENE-5620
Project: Lucene - Core
Issue Type: Improvement
Reporter: Mike Sokolov
Following closely the model of LUCENE-5437 (which worked on
ASCIIFoldingFilter), this patch adds the ability to preserve the original token
to LowerCaseFilter. This is useful if you want an all-lowercase search term to
match without regard to case, while search terms with uppercase letters match
in a case-sensitive manner.
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