Chris M. Hostetter created LUCENE-10008:
-------------------------------------------

             Summary: CommonGramsFilterFactory doesn't respect ignoreCase=true 
when default stopwords are used
                 Key: LUCENE-10008
                 URL: https://issues.apache.org/jira/browse/LUCENE-10008
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Chris M. Hostetter


CommonGramsFilterFactory's use of the "words" and "ignoreCase" config options 
is inconsistent with how StopFilterFactory uses them - leading to 
"ignoreCase=true" not being respected unless "words" is specified...

StopFilterFactory...
{code:java}
  public void inform(ResourceLoader loader) throws IOException {
    if (stopWordFiles != null) {
      ...
    } else {
      ...
      stopWords = new CharArraySet(EnglishAnalyzer.ENGLISH_STOP_WORDS_SET, 
ignoreCase);
    }
  }
{code}
CommonGramsFilterFactory...
{code:java}
  @Override
  public void inform(ResourceLoader loader) throws IOException {
    if (commonWordFiles != null) {
      ...
    } else {
      commonWords = EnglishAnalyzer.ENGLISH_STOP_WORDS_SET;
    }
  }
{code}



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