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.io.InputStream;
  import java.io.OutputStream;
  import java.net.URI;
  import java.nio.channels.AsynchronousFileChannel;
  import java.nio.channels.FileChannel;
  import java.nio.channels.SeekableByteChannel;
  import java.nio.file.AccessMode;
  import java.nio.file.CopyOption;
  import java.nio.file.DirectoryStream;
  import java.nio.file.FileStore;
  import java.nio.file.FileSystem;
  import java.nio.file.LinkOption;
  import java.nio.file.OpenOption;
  import java.nio.file.Path;
  import java.nio.file.attribute.BasicFileAttributes;
  import java.nio.file.attribute.FileAttribute;
  import java.nio.file.attribute.FileAttributeView;
  import java.nio.file.spi.FileSystemProvider;
  import java.util.Iterator;
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.ExecutorService;
  
  import com.google.common.collect.Iterators;
  
  public class ForwardingFileSystemProvider extends FileSystemProvider
  {
      protected final FileSystemProvider delegate;
  
      public ForwardingFileSystemProvider(FileSystemProvider delegate)
      {
          this.delegate = delegate;
      }
  
      protected FileSystemProvider delegate()
      {
          return delegate;
      }
  
      protected Path wrap(Path p)
      {
          return p;
      }
  
      protected Path unwrap(Path p)
      {
          return p;
      }
  
      @Override
      public String getScheme()
      {
          return delegate().getScheme();
      }
  
      @Override
      public FileSystem newFileSystem(URI uri, Map<String, ?> env) throws IOException
      {
          return delegate().newFileSystem(uri, env);
      }
  
      @Override
      public FileSystem getFileSystem(URI uri)
      {
          return delegate().getFileSystem(uri);
      }
  
      @Override
      public Path getPath(URI uri)
      {
          return wrap(delegate().getPath(uri));
      }
  
      @Override
      public SeekableByteChannel newByteChannel(Path path, Set<? extends OpenOption> options, FileAttribute<?>... attrs) throws IOException
      {
          return delegate().newByteChannel(unwrap(path), options, attrs);
      }
  
      @Override
      public DirectoryStream<Path> newDirectoryStream(Path dir, DirectoryStream.Filter<? super Path> filter) throws IOException
      {
          DirectoryStream<Path> stream = delegate().newDirectoryStream(unwrap(dir), filter);
          return new DirectoryStream<Path>()
          {
              @Override
              public Iterator<Path> iterator()
              {
                  return Iterators.transform(stream.iterator(), ForwardingFileSystemProvider.this::wrap);
              }
  
              @Override
              public void close() throws IOException
              {
                  stream.close();
              }
          };
      }
  
      @Override
      public void createDirectory(Path dir, FileAttribute<?>... attrs) throws IOException
      {
          delegate().createDirectory(unwrap(dir), attrs);
      }
  
      @Override
      public void delete(Path path) throws IOException
      {
          delegate().delete(unwrap(path));
      }
  
      @Override
      public void copy(Path source, Path target, CopyOption... options) throws IOException
      {
          delegate().copy(unwrap(source), unwrap(target), options);
      }
  
      @Override
      public void move(Path source, Path target, CopyOption... options) throws IOException
      {
          delegate().move(unwrap(source), unwrap(target), options);
      }
  
      @Override
      public boolean isSameFile(Path path, Path path2) throws IOException
      {
          return delegate().isSameFile(unwrap(path), unwrap(path2));
      }
  
      @Override
      public boolean isHidden(Path path) throws IOException
      {
          return delegate().isHidden(unwrap(path));
      }
  
      @Override
      public FileStore getFileStore(Path path) throws IOException
      {
          return delegate().getFileStore(unwrap(path));
      }
  
      @Override
      public void checkAccess(Path path, AccessMode... modes) throws IOException
      {
          delegate().checkAccess(unwrap(path), modes);
      }
  
      @Override
      public <V extends FileAttributeView> V getFileAttributeView(Path path, Class<V> type, LinkOption... options)
      {
          return delegate().getFileAttributeView(unwrap(path), type, options);
      }
  
      @Override
      public <A extends BasicFileAttributes> A readAttributes(Path path, Class<A> type, LinkOption... options) throws IOException
      {
          return delegate().readAttributes(unwrap(path), type, options);
      }
  
      @Override
      public Map<String, Object> readAttributes(Path path, String attributes, LinkOption... options) throws IOException
      {
          return delegate().readAttributes(unwrap(path), attributes, options);
      }
  
      @Override
      public void setAttribute(Path path, String attribute, Object value, LinkOption... options) throws IOException
      {
          delegate().setAttribute(unwrap(path), attribute, value, options);
      }
  
      @Override
      public FileSystem newFileSystem(Path path, Map<String, ?> env) throws IOException
      {
          return delegate().newFileSystem(unwrap(path), env);
      }
  
      @Override
      public InputStream newInputStream(Path path, OpenOption... options) throws IOException
      {
          return delegate().newInputStream(unwrap(path), options);
      }
  
      @Override
      public OutputStream newOutputStream(Path path, OpenOption... options) throws IOException
      {
          return delegate().newOutputStream(unwrap(path), options);
      }
  
      @Override
      public FileChannel newFileChannel(Path path, Set<? extends OpenOption> options, FileAttribute<?>... attrs) throws IOException
      {
          return delegate().newFileChannel(unwrap(path), options, attrs);
      }
  
      @Override
      public AsynchronousFileChannel newAsynchronousFileChannel(Path path, Set<? extends OpenOption> options, ExecutorService executor, FileAttribute<?>... attrs) throws IOException
      {
          return delegate().newAsynchronousFileChannel(unwrap(path), options, executor, attrs);
      }
  
      @Override
      public void createSymbolicLink(Path link, Path target, FileAttribute<?>... attrs) throws IOException
      {
          delegate().createSymbolicLink(unwrap(link), target, attrs);
      }
  
      @Override
      public void createLink(Path link, Path existing) throws IOException
      {
          delegate().createLink(unwrap(link), unwrap(existing));
      }
  
      @Override
      public boolean deleteIfExists(Path path) throws IOException
      {
          return delegate().deleteIfExists(unwrap(path));
      }
  
      @Override
      public Path readSymbolicLink(Path link) throws IOException
      {
          return wrap(delegate().readSymbolicLink(unwrap(link)));
      }
  }
  