| /* |
| * 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. |
| */ |
| package org.apache.lucene.index; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.function.UnaryOperator; |
| |
| /** |
| * A wrapping merge policy that wraps the {@link org.apache.lucene.index.MergePolicy.OneMerge} |
| * objects returned by the wrapped merge policy. |
| * |
| * @lucene.experimental |
| */ |
| public class OneMergeWrappingMergePolicy extends FilterMergePolicy { |
| |
| private final UnaryOperator<OneMerge> wrapOneMerge; |
| |
| /** |
| * Constructor |
| * |
| * @param in - the wrapped merge policy |
| * @param wrapOneMerge - operator for wrapping OneMerge objects |
| */ |
| public OneMergeWrappingMergePolicy(MergePolicy in, UnaryOperator<OneMerge> wrapOneMerge) { |
| super(in); |
| this.wrapOneMerge = wrapOneMerge; |
| } |
| |
| @Override |
| public MergeSpecification findMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergeContext mergeContext) |
| throws IOException { |
| return wrapSpec(in.findMerges(mergeTrigger, segmentInfos, mergeContext)); |
| } |
| |
| @Override |
| public MergeSpecification findForcedMerges(SegmentInfos segmentInfos, int maxSegmentCount, |
| Map<SegmentCommitInfo,Boolean> segmentsToMerge, MergeContext mergeContext) throws IOException { |
| return wrapSpec(in.findForcedMerges(segmentInfos, maxSegmentCount, segmentsToMerge, mergeContext)); |
| } |
| |
| @Override |
| public MergeSpecification findForcedDeletesMerges(SegmentInfos segmentInfos, MergeContext mergeContext) |
| throws IOException { |
| return wrapSpec(in.findForcedDeletesMerges(segmentInfos, mergeContext)); |
| } |
| |
| @Override |
| public MergeSpecification findFullFlushMerges(MergeTrigger mergeTrigger, SegmentInfos segmentInfos, MergeContext mergeContext) throws IOException { |
| return wrapSpec(in.findFullFlushMerges(mergeTrigger, segmentInfos, mergeContext)); |
| } |
| |
| private MergeSpecification wrapSpec(MergeSpecification spec) { |
| MergeSpecification wrapped = spec == null ? null : new MergeSpecification(); |
| if (wrapped != null) { |
| for (OneMerge merge : spec.merges) { |
| wrapped.add(wrapOneMerge.apply(merge)); |
| } |
| } |
| return wrapped; |
| } |
| |
| } |