/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.search.fetch.subphase.highlight;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.highlight.QueryScorer;
import org.apache.lucene.search.highlight.WeightedSpanTerm;
import org.apache.lucene.search.highlight.WeightedSpanTermExtractor;
import org.elasticsearch.common.lucene.search.function.FiltersFunctionScoreQuery;
import org.elasticsearch.common.lucene.search.function.FunctionScoreQuery;
import java.io.IOException;
import java.util.Map;
public final class CustomQueryScorer extends QueryScorer {
public CustomQueryScorer(Query query, IndexReader reader, String field,
String defaultField) {
super(query, reader, field, defaultField);
}
public CustomQueryScorer(Query query, IndexReader reader, String field) {
super(query, reader, field);
}
public CustomQueryScorer(Query query, String field, String defaultField) {
super(query, field, defaultField);
}
public CustomQueryScorer(Query query, String field) {
super(query, field);
}
public CustomQueryScorer(Query query) {
super(query);
}
public CustomQueryScorer(WeightedSpanTerm[] weightedTerms) {
super(weightedTerms);
}
@Override
protected WeightedSpanTermExtractor newTermExtractor(String defaultField) {
return defaultField == null ? new CustomWeightedSpanTermExtractor()
: new CustomWeightedSpanTermExtractor(defaultField);
}
private static class CustomWeightedSpanTermExtractor extends WeightedSpanTermExtractor {
CustomWeightedSpanTermExtractor() {
super();
}
CustomWeightedSpanTermExtractor(String defaultField) {
super(defaultField);
}
@Override
protected void extractUnknownQuery(Query query,
Map<String, WeightedSpanTerm> terms) throws IOException {
if (terms.isEmpty()) {
extractWeightedTerms(terms, query, 1F);
}
}
protected void extract(Query query, float boost, Map<String, WeightedSpanTerm> terms) throws IOException {
if (isChildOrParentQuery(query.getClass())) {
// skip has_child or has_parent queries, see: https://github.com/elastic/elasticsearch/issues/14999
return;
} else if (query instanceof FunctionScoreQuery) {
super.extract(((FunctionScoreQuery) query).getSubQuery(), boost, terms);
} else if (query instanceof FiltersFunctionScoreQuery) {
super.extract(((FiltersFunctionScoreQuery) query).getSubQuery(), boost, terms);
} else {
super.extract(query, boost, terms);
}
}
/**
* Workaround to detect parent/child query
*/
private static final String PARENT_CHILD_QUERY_NAME = "HasChildQueryBuilder$LateParsingQuery";
private static boolean isChildOrParentQuery(Class<?> clazz) {
return clazz.getName().endsWith(PARENT_CHILD_QUERY_NAME);
}
}
}