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.carbon.flink;
  
  import java.net.URI;
  
  import org.apache.flink.core.fs.BlockLocation;
  import org.apache.flink.core.fs.FSDataInputStream;
  import org.apache.flink.core.fs.FSDataOutputStream;
  import org.apache.flink.core.fs.FileStatus;
  import org.apache.flink.core.fs.FileSystem;
  import org.apache.flink.core.fs.FileSystemKind;
  import org.apache.flink.core.fs.Path;
  
  /**
   * Flink need user provides file output stream when use StreamingFileSink,
   * but CarbonWriter encapsulate the file output stream inside the SDK,
   * so, we need a proxy file output stream to connect StreamingFileSink and CarbonWriter.
   */
  public final class ProxyFileSystem extends FileSystem {
  
    public static final String SCHEMA = "proxy";
  
    public static final URI DEFAULT_URI = URI.create(SCHEMA + ":/");
  
    public static final ProxyFileSystem INSTANCE = new ProxyFileSystem();
  
    private ProxyFileSystem() {
      // private constructor.
    }
  
    @Override
    public Path getWorkingDirectory() {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public Path getHomeDirectory() {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public URI getUri() {
      return DEFAULT_URI;
    }
  
    @Override
    public FileStatus getFileStatus(final Path path) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public BlockLocation[] getFileBlockLocations(
            final FileStatus fileStatus,
            final long offset,
            final long length
    ) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public FSDataInputStream open(final Path path, final int i) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public FSDataInputStream open(final Path path) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public FileStatus[] listStatus(final Path path) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public boolean delete(final Path path, final boolean b) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public boolean mkdirs(final Path path) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public FSDataOutputStream create(final Path path, final WriteMode writeMode) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public ProxyRecoverableWriter createRecoverableWriter() {
      return new ProxyRecoverableWriter();
    }
  
    @Override
    public boolean rename(final Path source, final Path target) {
      throw new UnsupportedOperationException();
    }
  
    @Override
    public boolean isDistributedFS() {
      return false;
    }
  
    @Override
    public FileSystemKind getKind() {
      return FileSystemKind.FILE_SYSTEM;
    }
  
  }
  