| package org.apache.solr.search.grouping.distributed.shardresultserializer; |
| |
| /* |
| * 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.Sort; |
| import org.apache.lucene.search.grouping.SearchGroup; |
| import org.apache.lucene.util.BytesRef; |
| import org.apache.solr.common.util.NamedList; |
| import org.apache.solr.schema.FieldType; |
| import org.apache.solr.schema.SchemaField; |
| import org.apache.solr.search.SolrIndexSearcher; |
| import org.apache.solr.search.grouping.Command; |
| import org.apache.solr.search.grouping.distributed.command.SearchGroupsFieldCommand; |
| |
| import java.io.IOException; |
| import java.util.*; |
| |
| /** |
| * Implementation for transforming {@link SearchGroup} into a {@link NamedList} structure and visa versa. |
| */ |
| public class SearchGroupsResultTransformer implements ShardResultTransformer<List<Command>, Map<String, Collection<SearchGroup<String>>>> { |
| |
| private final SolrIndexSearcher searcher; |
| |
| public SearchGroupsResultTransformer(SolrIndexSearcher searcher) { |
| this.searcher = searcher; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public NamedList transform(List<Command> data) throws IOException { |
| NamedList<NamedList> result = new NamedList<NamedList>(); |
| for (Command command : data) { |
| NamedList commandResult; |
| if (SearchGroupsFieldCommand.class.isInstance(command)) { |
| SearchGroupsFieldCommand fieldCommand = (SearchGroupsFieldCommand) command; |
| Collection<SearchGroup<String>> searchGroups = fieldCommand.result(); |
| if (searchGroups == null) { |
| continue; |
| } |
| |
| commandResult = serializeSearchGroup(searchGroups, fieldCommand.getGroupSort()); |
| } else { |
| commandResult = null; |
| } |
| |
| result.add(command.getKey(), commandResult); |
| } |
| return result; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public Map<String, Collection<SearchGroup<String>>> transformToNative(NamedList<NamedList> shardResponse, Sort groupSort, Sort sortWithinGroup, String shard) throws IOException { |
| Map<String, Collection<SearchGroup<String>>> result = new HashMap<String, Collection<SearchGroup<String>>>(); |
| for (Map.Entry<String, NamedList> command : shardResponse) { |
| List<SearchGroup<String>> searchGroups = new ArrayList<SearchGroup<String>>(); |
| @SuppressWarnings("unchecked") |
| NamedList<List<Comparable>> rawSearchGroups = command.getValue(); |
| for (Map.Entry<String, List<Comparable>> rawSearchGroup : rawSearchGroups){ |
| SearchGroup<String> searchGroup = new SearchGroup<String>(); |
| searchGroup.groupValue = rawSearchGroup.getKey() != null ? rawSearchGroup.getKey() : null; |
| searchGroup.sortValues = rawSearchGroup.getValue().toArray(new Comparable[rawSearchGroup.getValue().size()]); |
| searchGroups.add(searchGroup); |
| } |
| |
| result.put(command.getKey(), searchGroups); |
| } |
| return result; |
| } |
| |
| private NamedList serializeSearchGroup(Collection<SearchGroup<String>> data, Sort groupSort) { |
| NamedList<Comparable[]> result = new NamedList<Comparable[]>(); |
| |
| for (SearchGroup<String> searchGroup : data) { |
| Comparable[] convertedSortValues = new Comparable[searchGroup.sortValues.length]; |
| for (int i = 0; i < searchGroup.sortValues.length; i++) { |
| Comparable sortValue = (Comparable) searchGroup.sortValues[i]; |
| SchemaField field = groupSort.getSort()[i].getField() != null ? searcher.getSchema().getFieldOrNull(groupSort.getSort()[i].getField()) : null; |
| if (field != null) { |
| FieldType fieldType = field.getType(); |
| if (sortValue instanceof String) { |
| sortValue = (Comparable) fieldType.toObject(field.createField(fieldType.indexedToReadable((String) sortValue), 0.0f)); |
| } |
| } |
| convertedSortValues[i] = sortValue; |
| } |
| String groupValue = searchGroup.groupValue != null ? searchGroup.groupValue : null; |
| result.add(groupValue, convertedSortValues); |
| } |
| |
| return result; |
| } |
| |
| } |