| /* |
| * 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.store; |
| |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** A delegating Directory that records which files were |
| * written to and deleted. */ |
| public final class TrackingDirectoryWrapper extends FilterDirectory { |
| |
| private final Set<String> createdFileNames = Collections.synchronizedSet(new HashSet<String>()); |
| |
| public TrackingDirectoryWrapper(Directory in) { |
| super(in); |
| } |
| |
| @Override |
| public void deleteFile(String name) throws IOException { |
| in.deleteFile(name); |
| createdFileNames.remove(name); |
| } |
| |
| @Override |
| public IndexOutput createOutput(String name, IOContext context) throws IOException { |
| IndexOutput output = in.createOutput(name, context); |
| createdFileNames.add(name); |
| return output; |
| } |
| |
| @Override |
| public IndexOutput createTempOutput(String prefix, String suffix, IOContext context) |
| throws IOException { |
| IndexOutput tempOutput = in.createTempOutput(prefix, suffix, context); |
| createdFileNames.add(tempOutput.getName()); |
| return tempOutput; |
| } |
| |
| @Override |
| public void copyFrom(Directory from, String src, String dest, IOContext context) throws IOException { |
| in.copyFrom(from, src, dest, context); |
| createdFileNames.add(dest); |
| } |
| |
| @Override |
| public void rename(String source, String dest) throws IOException { |
| in.rename(source, dest); |
| synchronized (createdFileNames) { |
| createdFileNames.add(dest); |
| createdFileNames.remove(source); |
| } |
| } |
| |
| /** NOTE: returns a copy of the created files. */ |
| public Set<String> getCreatedFiles() { |
| return new HashSet<>(createdFileNames); |
| } |
| |
| public void clearCreatedFiles() { |
| createdFileNames.clear(); |
| } |
| } |