package org.apache.solr.search.grouping.endresulttransformer;
/*
* 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.
*/
import org.apache.lucene.search.ScoreDoc;
import org.apache.lucene.util.BytesRef;
import org.apache.solr.common.SolrDocumentList;
import org.apache.solr.common.util.NamedList;
import org.apache.solr.common.util.SimpleOrderedMap;
import org.apache.solr.handler.component.ResponseBuilder;
import org.apache.solr.search.grouping.GroupDocs;
import org.apache.solr.search.grouping.TopGroups;
import java.util.Map;
/**
* Implementation of {@link EndResultTransformer} that transforms the grouped result into a single flat list.
*/
public class SimpleEndResultTransformer implements EndResultTransformer {
/**
* {@inheritDoc}
*/
@Override
public void transform(Map<String, ?> result, ResponseBuilder rb, SolrDocumentSource solrDocumentSource) {
NamedList<Object> commands = new SimpleOrderedMap<>();
for (Map.Entry<String, ?> entry : result.entrySet()) {
Object value = entry.getValue();
if (TopGroups.class.isInstance(value)) {
@SuppressWarnings("unchecked")
TopGroups<BytesRef> topGroups = (TopGroups<BytesRef>) value;
NamedList<Object> command = new SimpleOrderedMap<>();
command.add("matches", rb.totalHitCount);
if (topGroups.totalGroupCount != null) {
command.add("ngroups", topGroups.totalGroupCount);
}
SolrDocumentList docList = new SolrDocumentList();
docList.setStart(rb.getGroupingSpec().getOffset());
docList.setNumFound(topGroups.totalHitCount);
Float maxScore = Float.NEGATIVE_INFINITY;
for (GroupDocs<BytesRef> group : topGroups.groups) {
for (ScoreDoc scoreDoc : group.scoreDocs) {
if (maxScore < scoreDoc.score) {
maxScore = scoreDoc.score;
}
docList.add(solrDocumentSource.retrieve(scoreDoc));
}
}
if (maxScore != Float.NEGATIVE_INFINITY) {
docList.setMaxScore(maxScore);
}
command.add("doclist", docList);
commands.add(entry.getKey(), command);
}
}
rb.rsp.add("grouped", commands);
}
}