Lucene.Net  3.0.3
Lucene.Net is a port of the Lucene search engine library, written in C# and targeted at .NET runtime users.
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KeepOnlyLastCommitDeletionPolicy.cs
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1 /*
2  * Licensed to the Apache Software Foundation (ASF) under one or more
3  * contributor license agreements. See the NOTICE file distributed with
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5  * The ASF licenses this file to You under the Apache License, Version 2.0
6  * (the "License"); you may not use this file except in compliance with
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8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
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14  * See the License for the specific language governing permissions and
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16  */
17 
18 using System.Collections.Generic;
19 
20 namespace Lucene.Net.Index
21 {
22 
23  /// <summary> This <see cref="IndexDeletionPolicy" /> implementation that
24  /// keeps only the most recent commit and immediately removes
25  /// all prior commits after a new commit is done. This is
26  /// the default deletion policy.
27  /// </summary>
28 
30  {
31 
32  /// <summary> Deletes all commits except the most recent one.</summary>
33  public void OnInit<T>(IList<T> commits) where T : IndexCommit
34  {
35  // Note that commits.size() should normally be 1:
36  OnCommit(commits);
37  }
38 
39  /// <summary> Deletes all commits except the most recent one.</summary>
40  public void OnCommit<T>(IList<T> commits) where T : IndexCommit
41  {
42  // Note that commits.size() should normally be 2 (if not
43  // called by onInit above):
44  int size = commits.Count;
45  for (int i = 0; i < size - 1; i++)
46  {
47  commits[i].Delete();
48  }
49  }
50  }
51 }