content: 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.solr.common.SolrDocumentList;
  import org.apache.solr.common.util.NamedList;
  import org.apache.solr.common.util.SimpleOrderedMap;
  import org.apache.solr.response.SolrQueryResponse;
  import org.apache.solr.schema.FieldType;
  import org.apache.solr.schema.SchemaField;
  import org.apache.solr.search.SolrIndexSearcher;
  import org.apache.solr.search.grouping.GroupingSpecification;
  import org.apache.solr.search.grouping.distributed.command.QueryCommandResult;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  /**
   *
   */
  public class GroupedEndResultTransformer implements EndResultTransformer {
  
    private final SolrIndexSearcher searcher;
  
    public GroupedEndResultTransformer(SolrIndexSearcher searcher) {
      this.searcher = searcher;
    }
  
    public void transform(Map<String, ?> result, SolrQueryResponse response, GroupingSpecification groupingSpecification, SolrDocumentSource solrDocumentSource) {
      NamedList<Object> commands = new NamedList<Object>();
      for (Map.Entry<String, ?> entry : result.entrySet()) {
        Object value = entry.getValue();
        if (TopGroups.class.isInstance(value)) {
          @SuppressWarnings("unchecked")
          TopGroups<String> topGroups = (TopGroups<String>) value;
          NamedList<Object> command = new SimpleOrderedMap<Object>();
          command.add("matches", topGroups.totalHitCount);
          if (topGroups.totalGroupCount != null) {
            command.add("ngroups", topGroups.totalGroupCount);
          }
  
          List<NamedList> groups = new ArrayList<NamedList>();
          SchemaField groupField = searcher.getSchema().getField(entry.getKey());
          FieldType groupFieldType = groupField.getType();
          for (GroupDocs<String> group : topGroups.groups) {
            SimpleOrderedMap<Object> groupResult = new SimpleOrderedMap<Object>();
            if (group.groupValue != null) {
              groupResult.add(
                  "groupValue", groupFieldType.toObject(groupField.createField(group.groupValue, 0.0f))
              );
            } else {
              groupResult.add("groupValue", null);
            }
            SolrDocumentList docList = new SolrDocumentList();
            docList.setNumFound(group.totalHits);
            if (!Float.isNaN(group.maxScore)) {
              docList.setMaxScore(group.maxScore);
            }
  		  docList.setSum(group.sum);
            docList.setMax(group.max);
            docList.setMin(group.min);
            docList.setStart(groupingSpecification.getGroupOffset());
            for (ScoreDoc scoreDoc : group.scoreDocs) {
              docList.add(solrDocumentSource.retrieve(scoreDoc));
            }
            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<Object>();
          command.add("matches", queryCommandResult.getMatches());
          SolrDocumentList docList = new SolrDocumentList();
          docList.setNumFound(queryCommandResult.getTopDocs().totalHits);
          if (!Float.isNaN(queryCommandResult.getTopDocs().getMaxScore())) {
            docList.setMaxScore(queryCommandResult.getTopDocs().getMaxScore());
          }
  		docList.setSum(queryCommandResult.getTopDocs().getSum());
          docList.setMax(queryCommandResult.getTopDocs().getMax());
          docList.setMin(queryCommandResult.getTopDocs().getMin());
  
          docList.setStart(groupingSpecification.getGroupOffset());
          for (ScoreDoc scoreDoc :queryCommandResult.getTopDocs().scoreDocs){
            docList.add(solrDocumentSource.retrieve(scoreDoc));
          }
          command.add("doclist", docList);
          commands.add(entry.getKey(), command);
        }
      }
      response.add("grouped", commands);
    }
  
  }
  