/*
* 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.solr.search;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.index.Term;
import org.apache.lucene.queryparser.xml.DOMUtils;
import org.apache.lucene.queryparser.xml.ParserException;
import org.apache.lucene.queryparser.xml.builders.SpanQueryBuilder;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.spans.SpanQuery;
import org.apache.lucene.search.spans.SpanTermQuery;
import org.apache.solr.request.SolrQueryRequest;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
public class ChooseOneWordQueryBuilder extends SolrSpanQueryBuilder {
public ChooseOneWordQueryBuilder(String defaultField, Analyzer analyzer, SolrQueryRequest req,
SpanQueryBuilder spanFactory) {
super(defaultField, analyzer, req, spanFactory);
}
public Query getQuery(Element e) throws ParserException {
return implGetQuery(e, false);
}
public SpanQuery getSpanQuery(Element e) throws ParserException {
return (SpanQuery)implGetQuery(e, true);
}
public Query implGetQuery(Element e, boolean span) throws ParserException {
Term term = null;
final String fieldName = DOMUtils.getAttributeWithInheritanceOrFail(e, "fieldName");
for (Node node = e.getFirstChild(); node != null; node = node.getNextSibling()) {
if (node.getNodeType() == Node.ELEMENT_NODE &&
node.getNodeName().equals("Word")) {
final String word = DOMUtils.getNonBlankTextOrFail((Element) node);
final Term t = new Term(fieldName, word);
if (term == null || term.text().length() < t.text().length()) {
term = t;
}
}
}
return (span ? new SpanTermQuery(term) : new TermQuery(term));
}
}