/*
* 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.search.spans.SpanBoostQuery;
import org.apache.lucene.search.spans.SpanNearQuery;
import org.apache.lucene.search.spans.SpanQuery;
import org.apache.lucene.queryparser.xml.DOMUtils;
import org.apache.lucene.queryparser.xml.ParserException;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import java.util.ArrayList;
import java.util.List;
/**
* Builder for {@link SpanNearQuery}
*/
public class SpanNearBuilder extends SpanBuilderBase {
private final SpanQueryBuilder factory;
public SpanNearBuilder(SpanQueryBuilder factory) {
this.factory = factory;
}
@Override
public SpanQuery getSpanQuery(Element e) throws ParserException {
String slopString = DOMUtils.getAttributeOrFail(e, "slop");
int slop = Integer.parseInt(slopString);
boolean inOrder = DOMUtils.getAttribute(e, "inOrder", false);
List<SpanQuery> spans = new ArrayList<>();
for (Node kid = e.getFirstChild(); kid != null; kid = kid.getNextSibling()) {
if (kid.getNodeType() == Node.ELEMENT_NODE) {
spans.add(factory.getSpanQuery((Element) kid));
}
}
SpanQuery[] spanQueries = spans.toArray(new SpanQuery[spans.size()]);
SpanQuery snq = new SpanNearQuery(spanQueries, slop, inOrder);
float boost = DOMUtils.getAttribute(e, "boost", 1.0f);
return new SpanBoostQuery(snq, boost);
}
}