public Query parse(final String query) {
        return filterChain.parse(query);
    }

    protected org.apache.lucene.queryparser.classic.QueryParser createQueryParser() {
        final LuceneQueryParser parser = new LuceneQueryParser(defaultField, analyzer);
        parser.setAllowLeadingWildcard(allowLeadingWildcard);
        parser.setDefaultOperator(defaultOperator);
        return parser;
    }

import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.WildcardQuery;
import org.codelibs.fess.unit.UnitFessTestCase;

public class QueryParserTest extends UnitFessTestCase {

    public void test_LuceneQueryParser() {
        QueryParser queryParser = new QueryParser();

        Query query = queryParser.createDefaultFilterChain().parse("fess");
        assertEquals(TermQuery.class, query.getClass());