| using Lucene.Net.Index; |
| using Lucene.Net.Util; |
| using System.Collections.Generic; |
| |
| namespace Lucene.Net.Search.Grouping.Terms |
| { |
| /* |
| * 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. |
| */ |
| |
| /// <summary> |
| /// Concrete implementation of <see cref="AbstractSecondPassGroupingCollector{BytesRef}"/> that groups based on |
| /// field values and more specifically uses <see cref="SortedDocValues"/> |
| /// to collect grouped docs. |
| /// |
| /// @lucene.experimental |
| /// </summary> |
| public class TermSecondPassGroupingCollector : AbstractSecondPassGroupingCollector<BytesRef> |
| { |
| private readonly SentinelInt32Set ordSet; |
| private SortedDocValues index; |
| private readonly string groupField; |
| |
| public TermSecondPassGroupingCollector(string groupField, IEnumerable<ISearchGroup<BytesRef>> groups, Sort groupSort, Sort withinGroupSort, |
| int maxDocsPerGroup, bool getScores, bool getMaxScores, bool fillSortFields) |
| : base(groups, groupSort, withinGroupSort, maxDocsPerGroup, getScores, getMaxScores, fillSortFields) |
| { |
| ordSet = new SentinelInt32Set(m_groupMap.Count, -2); |
| this.groupField = groupField; |
| m_groupDocs = /*(SearchGroupDocs<BytesRef>[])*/ new AbstractSecondPassGroupingCollector.SearchGroupDocs<BytesRef>[ordSet.Keys.Length]; |
| } |
| |
| public override void SetNextReader(AtomicReaderContext context) |
| { |
| base.SetNextReader(context); |
| index = FieldCache.DEFAULT.GetTermsIndex(context.AtomicReader, groupField); |
| |
| // Rebuild ordSet |
| ordSet.Clear(); |
| foreach (AbstractSecondPassGroupingCollector.SearchGroupDocs<BytesRef> group in m_groupMap.Values) |
| { |
| // System.out.println(" group=" + (group.groupValue == null ? "null" : group.groupValue.utf8ToString())); |
| int ord = group.GroupValue == null ? -1 : index.LookupTerm(group.GroupValue); |
| if (group.GroupValue == null || ord >= 0) |
| { |
| m_groupDocs[ordSet.Put(ord)] = group; |
| } |
| } |
| } |
| |
| protected override AbstractSecondPassGroupingCollector.SearchGroupDocs<BytesRef> RetrieveGroup(int doc) |
| { |
| int slot = ordSet.Find(index.GetOrd(doc)); |
| if (slot >= 0) |
| { |
| return m_groupDocs[slot]; |
| } |
| return null; |
| } |
| } |
| } |