| package org.apache.lucene.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. |
| */ |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| |
| /** |
| * A {@link MergePolicy} which never returns merges to execute. Use it if you |
| * want to prevent segment merges. |
| */ |
| public final class NoMergePolicy extends MergePolicy { |
| |
| /** Singleton instance. */ |
| public static final MergePolicy INSTANCE = new NoMergePolicy(); |
| |
| private NoMergePolicy() { |
| super(); |
| } |
| |
| @Override |
| public MergeSpecification findMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, IndexWriter writer) { return null; } |
| |
| @Override |
| public MergeSpecification findForcedMerges(SegmentInfos segmentInfos, |
| int maxSegmentCount, Map<SegmentCommitInfo,Boolean> segmentsToMerge, IndexWriter writer) { return null; } |
| |
| @Override |
| public MergeSpecification findForcedDeletesMerges(SegmentInfos segmentInfos, IndexWriter writer) { return null; } |
| |
| @Override |
| public boolean useCompoundFile(SegmentInfos segments, SegmentCommitInfo newSegment, IndexWriter writer) { |
| return newSegment.info.getUseCompoundFile(); |
| } |
| |
| @Override |
| protected long size(SegmentCommitInfo info, IndexWriter writer) throws IOException { |
| return Long.MAX_VALUE; |
| } |
| |
| @Override |
| public String toString() { |
| return "NoMergePolicy"; |
| } |
| } |