1 package org.apache.lucene.index;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership.
7 * The ASF licenses this file to You under the Apache License, Version 2.0
8 * (the "License"); you may not use this file except in compliance with
9 * the License. You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
20 import java.io.IOException;
21 import java.util.List;
24 * An {@link IndexDeletionPolicy} which keeps all index commits around, never
25 * deleting them. This class is a singleton and can be accessed by referencing
28 public final class NoDeletionPolicy implements IndexDeletionPolicy {
30 /** The single instance of this class. */
31 public static final IndexDeletionPolicy INSTANCE = new NoDeletionPolicy();
33 private NoDeletionPolicy() {
34 // keep private to avoid instantiation
37 public void onCommit(List<? extends IndexCommit> commits) throws IOException {}
39 public void onInit(List<? extends IndexCommit> commits) throws IOException {}