/**
    * 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.hadoop.hbase.wal;
  
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.net.URI;
  
  import org.apache.hadoop.fs.FSDataInputStream;
  import org.apache.hadoop.fs.FSDataOutputStream;
  import org.apache.hadoop.fs.FileStatus;
  import org.apache.hadoop.fs.FileSystem;
  import org.apache.hadoop.fs.Path;
  import org.apache.hadoop.fs.permission.FsPermission;
  import org.apache.hadoop.util.Progressable;
  
  /**
   * Create a non-abstract "proxy" for FileSystem because FileSystem is an
   * abstract class and not an interface. Only interfaces can be used with the
   * Java Proxy class to override functionality via an InvocationHandler.
   *
   */
  public class FileSystemProxy extends FileSystem {
    private final FileSystem real;
  
    public FileSystemProxy(FileSystem real) {
      this.real = real;
    }
  
    @Override
    public FSDataInputStream open(Path p) throws IOException {
      return real.open(p);
    }
  
    @Override
    public URI getUri() {
      return real.getUri();
    }
  
    @Override
    public FSDataInputStream open(Path f, int bufferSize) throws IOException {
      return real.open(f, bufferSize);
    }
  
    @Override
    public FSDataOutputStream create(Path f, FsPermission permission, boolean overwrite,
        int bufferSize, short replication, long blockSize, Progressable progress) throws IOException {
      return real.create(f, permission, overwrite, bufferSize, replication, blockSize, progress);
    }
  
    @Override
    public FSDataOutputStream append(Path f, int bufferSize, Progressable progress)
        throws IOException {
      return real.append(f, bufferSize, progress);
    }
  
    @Override
    public boolean rename(Path src, Path dst) throws IOException {
      return real.rename(src, dst);
    }
  
    @Override
    public boolean delete(Path f, boolean recursive) throws IOException {
      return real.delete(f, recursive);
    }
  
    @Override
    public FileStatus[] listStatus(Path f) throws FileNotFoundException, IOException {
      return real.listStatus(f);
    }
  
    @Override
    public void setWorkingDirectory(Path new_dir) {
      real.setWorkingDirectory(new_dir);
    }
  
    @Override
    public Path getWorkingDirectory() {
      return real.getWorkingDirectory();
    }
  
    @Override
    public boolean mkdirs(Path f, FsPermission permission) throws IOException {
      return real.mkdirs(f, permission);
   }
 
   @Override
   public FileStatus getFileStatus(Path f) throws IOException {
     return real.getFileStatus(f);
   }
 }