01: /******************************************************************************
02: * JBoss, a division of Red Hat *
03: * Copyright 2006, Red Hat Middleware, LLC, and individual *
04: * contributors as indicated by the @authors tag. See the *
05: * copyright.txt in the distribution for a full listing of *
06: * individual contributors. *
07: * *
08: * This is free software; you can redistribute it and/or modify it *
09: * under the terms of the GNU Lesser General Public License as *
10: * published by the Free Software Foundation; either version 2.1 of *
11: * the License, or (at your option) any later version. *
12: * *
13: * This software is distributed in the hope that it will be useful, *
14: * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
16: * Lesser General Public License for more details. *
17: * *
18: * You should have received a copy of the GNU Lesser General Public *
19: * License along with this software; if not, write to the Free *
20: * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA *
21: * 02110-1301 USA, or see the FSF site: http://www.fsf.org. *
22: ******************************************************************************/package org.jboss.portal.search.impl;
23:
24: import org.jboss.portal.search.FederatedQuery;
25: import org.jboss.portal.search.Query;
26: import org.jboss.portal.search.QueryConversionException;
27: import org.jboss.portal.search.QueryConverter;
28:
29: /**
30: * @author <a href="mailto:theute@jboss.org">Thomas Heute</a>
31: * @version $Revision: 8784 $
32: */
33: public abstract class AbstractQueryConverter implements QueryConverter {
34:
35: public Query convert(FederatedQuery query)
36: throws QueryConversionException {
37: org.apache.lucene.search.Query luceneQuery = query
38: .getLuceneQuery();
39: if (luceneQuery == null) {
40: return null;
41: }
42: return convert(luceneQuery);
43:
44: }
45:
46: public Query convert(org.apache.lucene.search.Query luceneQuery)
47: throws QueryConversionException {
48: if (luceneQuery instanceof org.apache.lucene.search.TermQuery) {
49: return convertTermQuery((org.apache.lucene.search.TermQuery) luceneQuery);
50: } else if (luceneQuery instanceof org.apache.lucene.search.BooleanQuery) {
51: return convertBooleanQuery((org.apache.lucene.search.BooleanQuery) luceneQuery);
52: } else {
53: throw new QueryConversionException("Unknown query type: "
54: + luceneQuery.getClass());
55: }
56: }
57:
58: public abstract Query convertTermQuery(
59: org.apache.lucene.search.TermQuery query);
60:
61: public abstract Query convertBooleanQuery(
62: org.apache.lucene.search.BooleanQuery query)
63: throws QueryConversionException;
64: }
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