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https://issues.apache.org/jira/browse/LUCENE-2094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12783410#action_12783410
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Robert Muir commented on LUCENE-2094:
-------------------------------------
bq. This is one thing I thought about too - I did not change it to keep the
noise as low as possible in the patch but if we want to do it we can do in this
patch too.
well I think it will be noisy either way (updating all the analyzers, etc), but
will make things a lot more consistent and easier to maintain...
if you do this then StopFilter takes version so it can be modified / bugfixed
in the future in other ways too, with less noise.
I also think it will make it easier to write an analyzer.
because even completely ignoring the unicode issue, with the current codebase:
{code}
streams.source = new StandardTokenizer(matchVersion, reader);
streams.result = new StandardFilter(streams.source);
streams.result = new LowerCaseFilter(matchVersion, streams.result);
streams.result = new StopFilter(matchVersion, streams.result, stoptable);
...
{code}
reads a lot easier to me than
{code}
streams.source = new StandardTokenizer(matchVersion, reader);
streams.result = new StandardFilter(streams.source);
streams.result = new LowerCaseFilter(matchVersion, streams.result);
streams.result = new
StopFilter(StopFilter.getEnablePositionIncrementsVersionDefault(matchVersion),
streams.result, stoptable);
...
{code}
> Prepare CharArraySet for Unicode 4.0
> ------------------------------------
>
> Key: LUCENE-2094
> URL: https://issues.apache.org/jira/browse/LUCENE-2094
> Project: Lucene - Java
> Issue Type: Bug
> Components: Analysis
> Affects Versions: 1.9, 2.0.0, 2.1, 2.2, 2.3, 2.3.1, 2.3.2, 2.3.3, 2.4,
> 2.4.1, 2.4.2, 2.9, 2.9.1, 2.9.2, 3.0, 3.0.1, 3.1
> Reporter: Simon Willnauer
> Fix For: 3.1
>
> Attachments: LUCENE-2094.patch, LUCENE-2094.txt, LUCENE-2094.txt,
> LUCENE-2094.txt
>
>
> CharArraySet does lowercaseing if created with the correspondent flag. This
> causes that String / char[] with uncode 4 chars which are in the set can not
> be retrieved in "ignorecase" mode.
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