| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.lucene.queryparser.xml.builders; |
| |
| import org.apache.lucene.analysis.Analyzer; |
| import org.apache.lucene.analysis.TokenStream; |
| import org.apache.lucene.analysis.tokenattributes.TermToBytesRefAttribute; |
| import org.apache.lucene.index.Term; |
| import org.apache.lucene.search.BooleanClause; |
| import org.apache.lucene.search.BooleanQuery; |
| import org.apache.lucene.search.BoostQuery; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.TermQuery; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.lucene.queryparser.xml.DOMUtils; |
| import org.apache.lucene.queryparser.xml.ParserException; |
| import org.apache.lucene.queryparser.xml.QueryBuilder; |
| import org.w3c.dom.Element; |
| |
| import java.io.IOException; |
| |
| /** |
| * Builds a BooleanQuery from all of the terms found in the XML element using the choice of analyzer |
| */ |
| public class TermsQueryBuilder implements QueryBuilder { |
| |
| private final Analyzer analyzer; |
| |
| public TermsQueryBuilder(Analyzer analyzer) { |
| this.analyzer = analyzer; |
| } |
| |
| @Override |
| public Query getQuery(Element e) throws ParserException { |
| String fieldName = DOMUtils.getAttributeWithInheritanceOrFail(e, "fieldName"); |
| String text = DOMUtils.getNonBlankTextOrFail(e); |
| |
| BooleanQuery.Builder bq = new BooleanQuery.Builder(); |
| bq.setMinimumNumberShouldMatch(DOMUtils.getAttribute(e, "minimumNumberShouldMatch", 0)); |
| try (TokenStream ts = analyzer.tokenStream(fieldName, text)) { |
| TermToBytesRefAttribute termAtt = ts.addAttribute(TermToBytesRefAttribute.class); |
| Term term = null; |
| ts.reset(); |
| while (ts.incrementToken()) { |
| term = new Term(fieldName, BytesRef.deepCopyOf(termAtt.getBytesRef())); |
| bq.add(new BooleanClause(new TermQuery(term), BooleanClause.Occur.SHOULD)); |
| } |
| ts.end(); |
| } |
| catch (IOException ioe) { |
| throw new RuntimeException("Error constructing terms from index:" + ioe); |
| } |
| |
| Query q = bq.build(); |
| float boost = DOMUtils.getAttribute(e, "boost", 1.0f); |
| return new BoostQuery(q, boost); |
| } |
| |
| } |