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Posted to dev@lucene.apache.org by "Uwe Schindler (JIRA)" <ji...@apache.org> on 2011/01/25 20:47:43 UTC
[jira] Resolved: (LUCENE-1438) StandardTokenizer splits host names
with hyphens into multiple tokens
[ https://issues.apache.org/jira/browse/LUCENE-1438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Uwe Schindler resolved LUCENE-1438.
-----------------------------------
Resolution: Fixed
Fix Version/s: 3.1
In 3.1 there will be a replacement for the obsolete StandardTokenizer (the deprecated old one is now called ClassicTokenizer): LUCENE-2167, LUCENE-2763
StandardTokenizer as of Lucene 3.1 does not handle host names alltogether; instead you can use UAX29URLEmailTokenizer instead (also in standard package).
> StandardTokenizer splits host names with hyphens into multiple tokens
> ---------------------------------------------------------------------
>
> Key: LUCENE-1438
> URL: https://issues.apache.org/jira/browse/LUCENE-1438
> Project: Lucene - Java
> Issue Type: Bug
> Components: contrib/analyzers
> Affects Versions: 2.4
> Reporter: Robert Newson
> Fix For: 3.1
>
>
> StandardTokenizer does not recognize host names with hyphens as a single HOST token. Specifically "www.m-w.com" is tokenized as "www.m" and "w.com", both of "<HOST>" type.
> StandardTokenizer should instead output a single HOST token for "www.m-w.com", since hyphens are a legitimate character in DNS host names.
> We've a local fix to the grammar file which also required us to significantly simplify the NUM type to get the behavior we needed for host names.
> here's a junit test for the desired behavior;
> public void testWithHyphens() throws Exception {
> final String host = "www.m-w.com";
> final StandardTokenizer tokenizer = new StandardTokenizer(
> new StringReader(host));
> final Token token = new Token();
> tokenizer.next(token);
> assertEquals("<HOST>", token.type());
> assertEquals("www.m-w.com", token.term());
> }
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