StandardTokenizer splits host names with hyphens into multiple tokens
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Key: LUCENE-1438
URL: https://issues.apache.org/jira/browse/LUCENE-1438
Project: Lucene - Java
Issue Type: Bug
Components: Analysis
Affects Versions: 2.4
Reporter: Robert Newson
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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