[
http://issues.apache.org/jira/browse/LUCENE-627?page=comments#action_12420920 ]
Mark Harwood commented on LUCENE-627:
-------------------------------------
The problem appears to be because the "pod" token advances the start position
to 1 while the next token "ipod" takes a step back (to 0)
I've found if you just arrange the tokens to be emitted in start pos order all
is fine - see below
public void testOverlapAnalyzer2() throws Exception
{
String s = "iPod foo";
// the token stream for the string above:
TokenStream ts = new TokenStream() {
Iterator iter;
{
List lst = new ArrayList();
Token t;
//moved this token to start
t = new Token("ipod",0,4);
lst.add(t);
t = new Token("i",0,1);
lst.add(t);
t = new Token("pod",1,4);
t.setPositionIncrement(0);
lst.add(t);
t = new Token("foo",5,8);
lst.add(t);
iter = lst.iterator();
}
public Token next() throws IOException {
return iter.hasNext() ? (Token)iter.next() : null;
}
};
String srchkey = "foo";
QueryParser parser=new QueryParser("text",new WhitespaceAnalyzer());
Query query = parser.parse(srchkey);
Highlighter highlighter = new Highlighter(new QueryScorer(query));
// Get 3 best fragments and seperate with a "..."
String result = highlighter.getBestFragments(ts, s, 3, "...");
//had to upper case the P in the test here
String expectedResult="iPod <B>foo</B>";
assertEquals(expectedResult,result);
}
> highlighter problems with overlapping tokens
> --------------------------------------------
>
> Key: LUCENE-627
> URL: http://issues.apache.org/jira/browse/LUCENE-627
> Project: Lucene - Java
> Type: Bug
> Components: Other
> Versions: 2.0.1
> Reporter: Yonik Seeley
>
> The lucene highlighter has problems when tokens that overlap are generated.
> For example, if analysis of iPod generates the tokens "i", "pod", "ipod"
> (with pod and ipod in the same position),
> then the highlighter will output this as iipod, regardless of if any of those
> tokens are highlighted.
> Discovered via http://issues.apache.org/jira/browse/SOLR-24
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://issues.apache.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see:
http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
