Re: Wildcard & filters

[Mark Miller]

No prob....was a bit hasty though:

replace

= new BitSet();

with

= new BitSet(reader.maxDocs());


Beard, Brian wrote:

Mark,

Thanks so much.

-----Original Message-----

From: Mark Miller [mailto:[EMAIL PROTECTED] Sent: Friday, October 12, 2007 1:54 PM

To: java-user@lucene.apache.org
Subject: Re: Wildcard & filters

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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