| /* |
| * 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.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.commons.collections4.CollectionUtils; |
| import org.apache.lucene.index.IndexableField; |
| import org.apache.lucene.search.ScoreDoc; |
| import org.apache.lucene.search.TopDocs; |
| import org.apache.lucene.search.TotalHits; |
| 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.common.SolrException; |
| import org.apache.solr.common.SolrException.ErrorCode; |
| 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.schema.FieldType; |
| import org.apache.solr.schema.SchemaField; |
| import org.apache.solr.search.SolrIndexSearcher; |
| import org.apache.solr.search.SortSpec; |
| import org.apache.solr.search.grouping.distributed.command.QueryCommandResult; |
| |
| /** |
| * Implementation of {@link EndResultTransformer} that keeps each grouped result separate in the final response. |
| */ |
| public class GroupedEndResultTransformer implements EndResultTransformer { |
| |
| private final SolrIndexSearcher searcher; |
| |
| public GroupedEndResultTransformer(SolrIndexSearcher searcher) { |
| this.searcher = searcher; |
| } |
| |
| @Override |
| public void transform(Map<String, ?> result, ResponseBuilder rb, SolrDocumentSource solrDocumentSource) { |
| NamedList<Object> commands = new SimpleOrderedMap<>(); |
| SortSpec withinGroupSortSpec = rb.getGroupingSpec().getWithinGroupSortSpec(); |
| 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); |
| Integer totalGroupCount = rb.mergedGroupCounts.get(entry.getKey()); |
| if (totalGroupCount != null) { |
| command.add("ngroups", totalGroupCount); |
| } |
| |
| List<NamedList<Object>> groups = new ArrayList<>(); |
| SchemaField groupField = searcher.getSchema().getField(entry.getKey()); |
| FieldType groupFieldType = groupField.getType(); |
| for (GroupDocs<BytesRef> group : topGroups.groups) { |
| SimpleOrderedMap<Object> groupResult = new SimpleOrderedMap<>(); |
| if (group.groupValue != null) { |
| // use createFields so that fields having doc values are also supported |
| List<IndexableField> fields = groupField.createFields(group.groupValue.utf8ToString()); |
| if (CollectionUtils.isNotEmpty(fields)) { |
| groupResult.add("groupValue", groupFieldType.toObject(fields.get(0))); |
| } else { |
| throw new SolrException(ErrorCode.INVALID_STATE, |
| "Couldn't create schema field for grouping, group value: " + group.groupValue.utf8ToString() |
| + ", field: " + groupField); |
| } |
| } else { |
| groupResult.add("groupValue", null); |
| } |
| SolrDocumentList docList = new SolrDocumentList(); |
| assert group.totalHits.relation == TotalHits.Relation.EQUAL_TO; |
| docList.setNumFound(group.totalHits.value); |
| if (!Float.isNaN(group.maxScore)) { |
| docList.setMaxScore(group.maxScore); |
| } |
| docList.setStart(withinGroupSortSpec.getOffset()); |
| retrieveAndAdd(docList, solrDocumentSource, group.scoreDocs); |
| groupResult.add("doclist", docList); |
| groups.add(groupResult); |
| } |
| command.add("groups", groups); |
| commands.add(entry.getKey(), command); |
| } else if (QueryCommandResult.class.isInstance(value)) { |
| QueryCommandResult queryCommandResult = (QueryCommandResult) value; |
| NamedList<Object> command = new SimpleOrderedMap<>(); |
| command.add("matches", queryCommandResult.getMatches()); |
| SolrDocumentList docList = new SolrDocumentList(); |
| TopDocs topDocs = queryCommandResult.getTopDocs(); |
| assert topDocs.totalHits.relation == TotalHits.Relation.EQUAL_TO; |
| docList.setNumFound(topDocs.totalHits.value); |
| if (!Float.isNaN(queryCommandResult.getMaxScore())) { |
| docList.setMaxScore(queryCommandResult.getMaxScore()); |
| } |
| docList.setStart(withinGroupSortSpec.getOffset()); |
| retrieveAndAdd(docList, solrDocumentSource, queryCommandResult.getTopDocs().scoreDocs); |
| command.add("doclist", docList); |
| commands.add(entry.getKey(), command); |
| } |
| } |
| rb.rsp.add("grouped", commands); |
| } |
| |
| private static void retrieveAndAdd(SolrDocumentList solrDocumentList, SolrDocumentSource solrDocumentSource, ScoreDoc[] scoreDocs) { |
| for (ScoreDoc scoreDoc : scoreDocs) { |
| SolrDocument solrDocument = solrDocumentSource.retrieve(scoreDoc); |
| if (solrDocument != null) { |
| solrDocumentList.add(solrDocument); |
| } |
| } |
| } |
| |
| } |