Dmitry Malinin created LUCENE-7769:
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Summary: UnifiedHighlighter doesn't highlight PrefixQuery wrapped
in BootsQuery
Key: LUCENE-7769
URL: https://issues.apache.org/jira/browse/LUCENE-7769
Project: Lucene - Core
Issue Type: Bug
Components: modules/highlighter
Affects Versions: 6.4.2, 6.5
Reporter: Dmitry Malinin
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UnifiedHighlighter doesn't highlight MTQ wrapped in BootsQuery.
For example, suppose we have a doc with a field 'f' contains data 'lucene'.
UnifiedHighlighter highlights query (f:lucene*), but query (f:lucene*)^1
doesn't. Test code:
String field = "f";
String content = "lucene";
Term term = new Term(field, content);
UnifiedHighlighter highlighter = new UnifiedHighlighter(null, new
StandardAnalyzer());
Query[] queries = {new PrefixQuery(term), new BoostQuery(new PrefixQuery(term),
1.0f)};
Object fragObj;
for (Query query : queries)
{
fragObj = highlighter.highlightWithoutSearcher(field, query, content,
1);
System.out.printf("content=[%s] Query=%s frag=[%s]\n", content,
query, fragObj);
}
My opinion is because MultiTermHighlighting.extractAutomata() returns an empty
automaton for BoostQuery. I think, should add some thing like:
if (query instanceof BoostQuery) {
list.addAll(Arrays.asList(extractAutomata(((BoostQuery)
query).getQuery(), fieldMatcher, lookInSpan,
preRewriteFunc))) ; }
to MultiTermHighlighting.extractAutomata()
Thanks.
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