| /* |
| * 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.grouping.endresulttransformer; |
| |
| import java.util.Map; |
| |
| import org.apache.commons.lang3.ArrayUtils; |
| import org.apache.lucene.search.ScoreDoc; |
| import org.apache.lucene.search.TopDocs; |
| 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.SolrDocument; |
| import org.apache.solr.common.SolrDocumentList; |
| import org.apache.solr.handler.component.ResponseBuilder; |
| import org.apache.solr.search.grouping.GroupingSpecification; |
| import org.apache.solr.search.grouping.distributed.command.QueryCommandResult; |
| |
| /** |
| * Implementation of {@link EndResultTransformer} that transforms the grouped result into the main result list in the |
| * response. |
| */ |
| public class MainEndResultTransformer implements EndResultTransformer { |
| |
| @Override |
| public void transform(Map<String, ?> result, ResponseBuilder rb, SolrDocumentSource solrDocumentSource) { |
| GroupingSpecification groupingSpec = rb.getGroupingSpec(); |
| String[] entries = groupingSpec.getFields(); |
| if (ArrayUtils.isEmpty(entries)) { |
| entries = groupingSpec.getQueries(); |
| if (ArrayUtils.isEmpty(entries)) { |
| // group.func is not supported in distributed mode |
| // so when group.field or group.query is not specified return |
| return; |
| } |
| } |
| Object value = result.get(entries[0]); |
| if (TopGroups.class.isInstance(value)) { |
| @SuppressWarnings("unchecked") |
| TopGroups<BytesRef> topGroups = (TopGroups<BytesRef>) value; |
| SolrDocumentList docList = new SolrDocumentList(); |
| docList.setStart(rb.getGroupingSpec().getGroupSortSpec().getOffset()); |
| docList.setNumFound(rb.totalHitCount); |
| |
| float maxScore = Float.NEGATIVE_INFINITY; |
| for (GroupDocs<BytesRef> group : topGroups.groups) { |
| for (ScoreDoc scoreDoc : group.scoreDocs) { |
| if (maxScore < scoreDoc.score) { |
| maxScore = scoreDoc.score; |
| } |
| SolrDocument solrDocument = solrDocumentSource.retrieve(scoreDoc); |
| if (solrDocument != null) { |
| docList.add(solrDocument); |
| } |
| } |
| } |
| if (maxScore != Float.NEGATIVE_INFINITY) { |
| docList.setMaxScore(maxScore); |
| } |
| rb.rsp.addResponse(docList); |
| } else if (value instanceof QueryCommandResult) { |
| QueryCommandResult queryCommandResult = (QueryCommandResult) value; |
| SolrDocumentList docList = new SolrDocumentList(); |
| TopDocs topDocs = queryCommandResult.getTopDocs(); |
| |
| docList.setStart(rb.getGroupingSpec().getGroupSortSpec().getOffset()); |
| docList.setNumFound(topDocs.totalHits.value); |
| if (!Float.isNaN(queryCommandResult.getMaxScore())) { |
| docList.setMaxScore(queryCommandResult.getMaxScore()); |
| } |
| for (ScoreDoc scoreDoc : topDocs.scoreDocs) { |
| SolrDocument solrDocument = solrDocumentSource.retrieve(scoreDoc); |
| if (solrDocument != null) { |
| docList.add(solrDocument); |
| } |
| } |
| rb.rsp.addResponse(docList); |
| } |
| } |
| } |