package org.apache.lucene.store;
/*
* 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.Closeable;
import java.io.IOException;
import java.util.Collections;
import java.util.Collection;
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 Directory implements Closeable {
private final Directory other;
private final Set<String> createdFileNames = Collections.synchronizedSet(new HashSet<String>());
public TrackingDirectoryWrapper(Directory other) {
this.other = other;
}
@Override
public String[] listAll() throws IOException {
return other.listAll();
}
@Override
public boolean fileExists(String name) throws IOException {
return other.fileExists(name);
}
@Override
public void deleteFile(String name) throws IOException {
createdFileNames.remove(name);
other.deleteFile(name);
}
@Override
public long fileLength(String name) throws IOException {
return other.fileLength(name);
}
@Override
public IndexOutput createOutput(String name, IOContext context) throws IOException {
createdFileNames.add(name);
return other.createOutput(name, context);
}
@Override
public void sync(Collection<String> names) throws IOException {
other.sync(names);
}
@Override
public IndexInput openInput(String name, IOContext context) throws IOException {
return other.openInput(name, context);
}
@Override
public Lock makeLock(String name) {
return other.makeLock(name);
}
@Override
public void clearLock(String name) throws IOException {
other.clearLock(name);
}
@Override
public void close() throws IOException {
other.close();
}
@Override
public void setLockFactory(LockFactory lockFactory) throws IOException {
other.setLockFactory(lockFactory);
}
@Override
public LockFactory getLockFactory() {
return other.getLockFactory();
}
@Override
public String getLockID() {
return other.getLockID();
}
@Override
public String toString() {
return "TrackingDirectoryWrapper(" + other.toString() + ")";
}
@Override
public void copy(Directory to, String src, String dest, IOContext context) throws IOException {
createdFileNames.add(dest);
other.copy(to, src, dest, context);
}
@Override
public Directory.IndexInputSlicer createSlicer(final String name, final IOContext context) throws IOException {
return other.createSlicer(name, context);
}
// maybe clone before returning.... all callers are
// cloning anyway....
public Set<String> getCreatedFiles() {
return createdFileNames;
}
}