01: package org.apache.lucene.xmlparser.builders;
02:
03: import org.apache.lucene.search.ConstantScoreQuery;
04: import org.apache.lucene.search.Query;
05: import org.apache.lucene.xmlparser.DOMUtils;
06: import org.apache.lucene.xmlparser.FilterBuilderFactory;
07: import org.apache.lucene.xmlparser.ParserException;
08: import org.apache.lucene.xmlparser.QueryBuilder;
09: import org.w3c.dom.Element;
10:
11: /**
12: * Licensed to the Apache Software Foundation (ASF) under one or more
13: * contributor license agreements. See the NOTICE file distributed with
14: * this work for additional information regarding copyright ownership.
15: * The ASF licenses this file to You under the Apache License, Version 2.0
16: * (the "License"); you may not use this file except in compliance with
17: * the License. You may obtain a copy of the License at
18: *
19: * http://www.apache.org/licenses/LICENSE-2.0
20: *
21: * Unless required by applicable law or agreed to in writing, software
22: * distributed under the License is distributed on an "AS IS" BASIS,
23: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
24: * See the License for the specific language governing permissions and
25: * limitations under the License.
26: */
27: public class ConstantScoreQueryBuilder implements QueryBuilder {
28: private FilterBuilderFactory filterFactory;
29:
30: public ConstantScoreQueryBuilder(FilterBuilderFactory filterFactory) {
31: this .filterFactory = filterFactory;
32: }
33:
34: public Query getQuery(Element e) throws ParserException {
35: Element filterElem = DOMUtils.getFirstChildOrFail(e);
36: Query q = new ConstantScoreQuery(filterFactory
37: .getFilter(filterElem));
38:
39: q.setBoost(DOMUtils.getAttribute(e, "boost", 1.0f));
40:
41: return q;
42:
43: }
44:
45: }
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