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.ByteBuffer;
  import java.nio.MappedByteBuffer;
  import java.nio.channels.FileChannel;
  import java.nio.channels.FileLock;
  import java.nio.channels.ReadableByteChannel;
  import java.nio.channels.WritableByteChannel;
  
  public class ForwardingFileChannel extends FileChannel
  {
      protected final FileChannel delegate;
  
      public ForwardingFileChannel(FileChannel delegate)
      {
          this.delegate = delegate;
      }
  
      protected FileChannel delegate()
      {
          return delegate;
      }
  
      @Override
      public int read(ByteBuffer dst) throws IOException
      {
          return delegate().read(dst);
      }
  
      @Override
      public long read(ByteBuffer[] dsts, int offset, int length) throws IOException
      {
          return delegate().read(dsts, offset, length);
      }
  
      @Override
      public int write(ByteBuffer src) throws IOException
      {
          return delegate().write(src);
      }
  
      @Override
      public long write(ByteBuffer[] srcs, int offset, int length) throws IOException
      {
          return delegate().write(srcs, offset, length);
      }
  
      @Override
      public long position() throws IOException
      {
          return delegate().position();
      }
  
      @Override
      public FileChannel position(long newPosition) throws IOException
      {
          return delegate().position(newPosition);
      }
  
      @Override
      public long size() throws IOException
      {
          return delegate().size();
      }
  
      @Override
      public FileChannel truncate(long size) throws IOException
      {
          return delegate().truncate(size);
      }
  
      @Override
      public void force(boolean metaData) throws IOException
      {
          delegate().force(metaData);
      }
  
      @Override
      public long transferTo(long position, long count, WritableByteChannel target) throws IOException
      {
          return delegate().transferTo(position, count, target);
      }
  
      @Override
      public long transferFrom(ReadableByteChannel src, long position, long count) throws IOException
      {
          return delegate().transferFrom(src, position, count);
      }
  
      @Override
      public int read(ByteBuffer dst, long position) throws IOException
      {
          return delegate().read(dst, position);
      }
  
      @Override
      public int write(ByteBuffer src, long position) throws IOException
      {
          return delegate().write(src, position);
      }
  
      @Override
      public MappedByteBuffer map(MapMode mode, long position, long size) throws IOException
      {
          return delegate().map(mode, position, size);
      }
  
      @Override
      public FileLock lock(long position, long size, boolean shared) throws IOException
      {
          return delegate().lock(position, size, shared);
      }
  
      @Override
      public FileLock tryLock(long position, long size, boolean shared) throws IOException
      {
          return delegate().tryLock(position, size, shared);
      }
  
      @Override
      protected void implCloseChannel() throws IOException
      {
          // .close(), and .isOpen() are "final", so need to leverage implCloseChannel
          // to close the underline channel
          delegate().close();
      }
  }
  