Something along these lines:
public class WildcardFilter extends Filter {
private Term term;
public WildcardFilter(Term term) {
this.term = term;
}
@Override
public BitSet bits(IndexReader reader) throws IOException {
BitSet bits = new BitSet();
WildcardTermEnum enumerator = new WildcardTermEnum(reader, term);
TermDocs termDocs = reader.termDocs();
try {
do {
Term term = enumerator.term();
if (term != null) {
termDocs.seek(term);
while (termDocs.next()) {
bits.set(termDocs.doc());
}
} else {
break;
}
} while (enumerator.next());
} finally {
termDocs.close();
enumerator.close();
}
return bits;
}
}
- Mark
Beard, Brian wrote:
I'm trying to over-ride QueryParser.getWildcardQuery to use filtering.
I'm missing something, because the following still gets the
maxBooleanClauses limit.
I guess the terms are still expanded even though the query is wrapped in
a filter. How do I avoid the term expansion altogether? Is there a
built-in way to do this?
protected Query getWildcardQuery(String field, String termStr)
throws ParseException {
Query wildcardQuery = new WildcardQuery(new Term(field,
termStr));
QueryWrapperFilter queryWrapperFilter = new
QueryWrapperFilter(wildcardQuery);
ConstantScoreQuery constantScoreQuery = new
ConstantScoreQuery(queryWrapperFilter);
return constantScoreQuery;
}
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