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https://issues.apache.org/jira/browse/LUCENE-6874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15001257#comment-15001257
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Uwe Schindler commented on LUCENE-6874:
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Cool!
So my idea would be to write a small tool in the analysis/commons/src/tools
module that uses the current jflex JAR file in classpath and extract the values
for the bitset from the JFlex JAR file by accessing this class:
https://github.com/jflex-de/jflex/blob/master/jflex/src/main/java/jflex/unicode/data/Unicode_6_3.java
In my opinion this would be more elegant than creating a huge jflex
UnicodeWhitespaceTokenizer in a separate submodule, if we could just just a
codegenerator that produces a BitSet to be used in a CharTokenizer subclass.
CharTokenizer is thoroughly tested, so just feeding it with a bitset would be
my preference.
Would this work?
> WhitespaceTokenizer should tokenize on NBSP
> -------------------------------------------
>
> Key: LUCENE-6874
> URL: https://issues.apache.org/jira/browse/LUCENE-6874
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/analysis
> Reporter: David Smiley
> Priority: Minor
> Attachments: LUCENE-6874-jflex.patch, LUCENE-6874.patch,
> LUCENE_6874_jflex.patch
>
>
> WhitespaceTokenizer uses [Character.isWhitespace
> |http://docs.oracle.com/javase/8/docs/api/java/lang/Character.html#isWhitespace-int-]
> to decide what is whitespace. Here's a pertinent excerpt:
> bq. It is a Unicode space character (SPACE_SEPARATOR, LINE_SEPARATOR, or
> PARAGRAPH_SEPARATOR) but is not also a non-breaking space ('\u00A0',
> '\u2007', '\u202F')
> Perhaps Character.isWhitespace should have been called
> isLineBreakableWhitespace?
> I think WhitespaceTokenizer should tokenize on this. I am aware it's easy to
> work around but why leave this trap in by default?
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