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https://issues.apache.org/jira/browse/LUCENE-1689?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir updated LUCENE-1689:
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Attachment: testCurrentBehavior.txt
this is just a patch with testcases showing the existing behavior.
perhaps these should be fixed:
Simple/Standard/StopAnalyzer/etc: deletes all supp. characters completely.
LowerCaseFilter: doesn't lowercase supp. characters correctly.
WildcardQuery: ? operator does not work correctly.
perhaps these just need some javadocs:
FuzzyQuery: scoring is strange because its based upon surrogates, leave alone
and javadoc it.
LengthFilter: length is calculated based on utf-16 code units, leave alone and
javadoc it.
... and theres always the option to not change any code, but just javadoc all
the behavior as a "fix", providing stuff in contrib or elsewhere that works
correctly.
let me know what you think.
> supplementary character handling
> --------------------------------
>
> Key: LUCENE-1689
> URL: https://issues.apache.org/jira/browse/LUCENE-1689
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Robert Muir
> Priority: Minor
> Fix For: 3.1
>
> Attachments: LUCENE-1689_lowercase_example.txt,
> testCurrentBehavior.txt
>
>
> for Java 5. Java 5 is based on unicode 4, which means variable-width encoding.
> supplementary character support should be fixed for code that works with
> char/char[]
> For example:
> StandardAnalyzer, SimpleAnalyzer, StopAnalyzer, etc should at least be
> changed so they don't actually remove suppl characters, or modified to look
> for surrogates and behave correctly.
> LowercaseFilter should be modified to lowercase suppl. characters correctly.
> CharTokenizer should either be deprecated or changed so that isTokenChar()
> and normalize() use int.
> in all of these cases code should remain optimized for the BMP case, and
> suppl characters should be the exception, but still work.
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