| using J2N.Collections.Generic.Extensions; |
| using Lucene.Net.Diagnostics; |
| using Lucene.Net.Support; |
| using Lucene.Net.Util; |
| using System; |
| using System.Collections.Generic; |
| |
| namespace Lucene.Net.Index |
| { |
| /* |
| * 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> |
| /// <see cref="MergePolicy"/> that makes random decisions for testing. |
| /// </summary> |
| public class MockRandomMergePolicy : MergePolicy |
| { |
| private readonly Random random; |
| |
| public MockRandomMergePolicy(Random random) |
| { |
| // fork a private random, since we are called |
| // unpredictably from threads: |
| this.random = new Random(random.Next()); |
| } |
| |
| public override MergeSpecification FindMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos) |
| { |
| MergeSpecification mergeSpec = null; |
| //System.out.println("MRMP: findMerges sis=" + segmentInfos); |
| |
| int numSegments/* = segmentInfos.Count*/; // LUCENENET: IDE0059: Remove unnecessary value assignment |
| |
| IList<SegmentCommitInfo> segments = new List<SegmentCommitInfo>(); |
| ICollection<SegmentCommitInfo> merging = base.m_writer.Get().MergingSegments; |
| |
| foreach (SegmentCommitInfo sipc in segmentInfos.Segments) |
| { |
| if (!merging.Contains(sipc)) |
| { |
| segments.Add(sipc); |
| } |
| } |
| |
| numSegments = segments.Count; |
| |
| if (numSegments > 1 && (numSegments > 30 || random.Next(5) == 3)) |
| { |
| segments.Shuffle(random); |
| |
| // TODO: sometimes make more than 1 merge? |
| mergeSpec = new MergeSpecification(); |
| int segsToMerge = TestUtil.NextInt32(random, 1, numSegments); |
| mergeSpec.Add(new OneMerge(segments.SubList(0, segsToMerge))); |
| } |
| |
| return mergeSpec; |
| } |
| |
| public override MergeSpecification FindForcedMerges(SegmentInfos segmentInfos, int maxSegmentCount, IDictionary<SegmentCommitInfo, bool?> segmentsToMerge) |
| { |
| IList<SegmentCommitInfo> eligibleSegments = new List<SegmentCommitInfo>(); |
| foreach (SegmentCommitInfo info in segmentInfos.Segments) |
| { |
| if (segmentsToMerge.ContainsKey(info)) |
| { |
| eligibleSegments.Add(info); |
| } |
| } |
| |
| //System.out.println("MRMP: findMerges sis=" + segmentInfos + " eligible=" + eligibleSegments); |
| MergeSpecification mergeSpec = null; |
| if (eligibleSegments.Count > 1 || (eligibleSegments.Count == 1 && eligibleSegments[0].HasDeletions)) |
| { |
| mergeSpec = new MergeSpecification(); |
| // Already shuffled having come out of a set but |
| // shuffle again for good measure: |
| eligibleSegments.Shuffle(random); |
| int upto = 0; |
| while (upto < eligibleSegments.Count) |
| { |
| int max = Math.Min(10, eligibleSegments.Count - upto); |
| int inc = max <= 2 ? max : TestUtil.NextInt32(random, 2, max); |
| mergeSpec.Add(new OneMerge(eligibleSegments.SubList(upto, upto + inc))); |
| upto += inc; |
| } |
| } |
| |
| if (mergeSpec != null) |
| { |
| foreach (OneMerge merge in mergeSpec.Merges) |
| { |
| foreach (SegmentCommitInfo info in merge.Segments) |
| { |
| if (Debugging.AssertsEnabled) Debugging.Assert(segmentsToMerge.ContainsKey(info)); |
| } |
| } |
| } |
| return mergeSpec; |
| } |
| |
| public override MergeSpecification FindForcedDeletesMerges(SegmentInfos segmentInfos) |
| { |
| // LUCENENET specific - just use int.MinValue to indicate "null" |
| return FindMerges((MergeTrigger)int.MinValue, segmentInfos); |
| } |
| |
| protected override void Dispose(bool disposing) |
| { |
| } |
| |
| public override bool UseCompoundFile(SegmentInfos infos, SegmentCommitInfo mergedInfo) |
| { |
| // 80% of the time we create CFS: |
| return random.Next(5) != 1; |
| } |
| } |
| } |