| 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.search.grouping.GroupDocs; |
| import org.apache.lucene.search.grouping.TopGroups; |
| 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 java.util.Map; |
| |
| /** |
| * Implementation of {@link EndResultTransformer} that transforms the grouped result into a single flat list. |
| */ |
| public class SimpleEndResultTransformer implements EndResultTransformer { |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public void transform(Map<String, ?> result, ResponseBuilder rb, SolrDocumentSource solrDocumentSource) { |
| NamedList<Object> commands = new SimpleOrderedMap<Object>(); |
| 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<Object>(); |
| 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); |
| } |
| } |