| 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> |
| /// This <see cref="IndexDeletionPolicy"/> implementation that |
| /// keeps only the most recent commit and immediately removes |
| /// all prior commits after a new commit is done. This is |
| /// the default deletion policy. |
| /// </summary> |
| |
| public sealed class KeepOnlyLastCommitDeletionPolicy : IndexDeletionPolicy |
| { |
| /// <summary> |
| /// Sole constructor. </summary> |
| public KeepOnlyLastCommitDeletionPolicy() |
| { |
| } |
| |
| /// <summary> |
| /// Deletes all commits except the most recent one. |
| /// </summary> |
| public override void OnInit<T>(IList<T> commits) |
| { |
| // Note that commits.size() should normally be 1: |
| OnCommit(commits); |
| } |
| |
| /// <summary> |
| /// Deletes all commits except the most recent one. |
| /// </summary> |
| public override void OnCommit<T>(IList<T> commits) |
| { |
| // Note that commits.size() should normally be 2 (if not |
| // called by onInit above): |
| int size = commits.Count; |
| for (int i = 0; i < size - 1; i++) |
| { |
| commits[i].Delete(); |
| } |
| } |
| } |
| } |