content: /*
   * 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.cassandra.io.filesystem;
  
  import java.io.IOException;
  import java.nio.file.FileStore;
  import java.nio.file.FileSystem;
  import java.nio.file.Path;
  import java.nio.file.PathMatcher;
  import java.nio.file.WatchService;
  import java.nio.file.attribute.UserPrincipalLookupService;
  import java.nio.file.spi.FileSystemProvider;
  import java.util.Set;
  
  import com.google.common.collect.Iterables;
  
  public class ForwardingFileSystem extends FileSystem
  {
      protected final FileSystem delegate;
  
      public ForwardingFileSystem(FileSystem delegate)
      {
          this.delegate = delegate;
      }
  
      protected FileSystem delegate()
      {
          return delegate;
      }
  
      protected Path wrap(Path p)
      {
          return p;
      }
  
      protected Path unwrap(Path p)
      {
          return p;
      }
  
      @Override
      public FileSystemProvider provider()
      {
          return delegate().provider();
      }
  
      @Override
      public void close() throws IOException
      {
          delegate().close();
      }
  
      @Override
      public boolean isOpen()
      {
          return delegate().isOpen();
      }
  
      @Override
      public boolean isReadOnly()
      {
          return delegate().isReadOnly();
      }
  
      @Override
      public String getSeparator()
      {
          return delegate().getSeparator();
      }
  
      @Override
      public Iterable<Path> getRootDirectories()
      {
          return Iterables.transform(delegate().getRootDirectories(), this::wrap);
      }
  
      @Override
      public Iterable<FileStore> getFileStores()
      {
          return delegate().getFileStores();
      }
  
      @Override
      public Set<String> supportedFileAttributeViews()
      {
          return delegate().supportedFileAttributeViews();
      }
  
      @Override
      public Path getPath(String first, String... more)
      {
          return wrap(delegate().getPath(first, more));
      }
  
      @Override
      public PathMatcher getPathMatcher(String syntaxAndPattern)
      {
          PathMatcher matcher = delegate().getPathMatcher(syntaxAndPattern);
          return path -> matcher.matches(unwrap(path));
      }
  
      @Override
      public UserPrincipalLookupService getUserPrincipalLookupService()
      {
          return delegate().getUserPrincipalLookupService();
      }
  
      @Override
      public WatchService newWatchService() throws IOException
      {
          return delegate().newWatchService();
      }
  }
  