/*
    * Copyright 2009 Red Hat, Inc.
    *
    * Red Hat 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.jboss.netty.buffer;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.nio.ByteBuffer;
  import java.nio.ByteOrder;
  import java.nio.channels.GatheringByteChannel;
  import java.nio.channels.ScatteringByteChannel;
  
  
  /**
   * A derived buffer which simply forwards all data access requests to its
   * parent.  It is recommended to use {@link ChannelBuffer#duplicate()} instead
   * of calling the constructor explicitly.
   *
   * @author <a href="http://www.jboss.org/netty/">The Netty Project</a>
   * @author <a href="http://gleamynode.net/">Trustin Lee</a>
   *
   * @version $Rev: 2206 $, $Date: 2010-03-03 14:35:01 +0900 (Wed, 03 Mar 2010) $
   *
   */
  public class DuplicatedChannelBuffer extends AbstractChannelBuffer implements WrappedChannelBuffer {
  
      private final ChannelBuffer buffer;
  
      public DuplicatedChannelBuffer(ChannelBuffer buffer) {
          if (buffer == null) {
              throw new NullPointerException("buffer");
          }
          this.buffer = buffer;
          setIndex(buffer.readerIndex(), buffer.writerIndex());
      }
  
      private DuplicatedChannelBuffer(DuplicatedChannelBuffer buffer) {
          this.buffer = buffer.buffer;
          setIndex(buffer.readerIndex(), buffer.writerIndex());
      }
  
      public ChannelBuffer unwrap() {
          return buffer;
      }
  
      public ChannelBufferFactory factory() {
          return buffer.factory();
      }
  
      public ByteOrder order() {
          return buffer.order();
      }
  
      public boolean isDirect() {
          return buffer.isDirect();
      }
  
      public int capacity() {
          return buffer.capacity();
      }
  
      public boolean hasArray() {
          return buffer.hasArray();
      }
  
      public byte[] array() {
          return buffer.array();
      }
  
      public int arrayOffset() {
          return buffer.arrayOffset();
      }
  
      public byte getByte(int index) {
          return buffer.getByte(index);
      }
  
      public short getShort(int index) {
          return buffer.getShort(index);
      }
  
      public int getUnsignedMedium(int index) {
          return buffer.getUnsignedMedium(index);
      }
  
      public int getInt(int index) {
         return buffer.getInt(index);
     }
 
     public long getLong(int index) {
         return buffer.getLong(index);
     }
 
     public ChannelBuffer duplicate() {
         return new DuplicatedChannelBuffer(this);
     }
 
     public ChannelBuffer copy(int index, int length) {
         return buffer.copy(index, length);
     }
 
     public ChannelBuffer slice(int index, int length) {
         return buffer.slice(index, length);
     }
 
     public void getBytes(int index, ChannelBuffer dst, int dstIndex, int length) {
         buffer.getBytes(index, dst, dstIndex, length);
     }
 
     public void getBytes(int index, byte[] dst, int dstIndex, int length) {
         buffer.getBytes(index, dst, dstIndex, length);
     }
 
     public void getBytes(int index, ByteBuffer dst) {
         buffer.getBytes(index, dst);
     }
 
     public void setByte(int index, int value) {
         buffer.setByte(index, value);
     }
 
     public void setShort(int index, int value) {
         buffer.setShort(index, value);
     }
 
     public void setMedium(int index, int value) {
         buffer.setMedium(index, value);
     }
 
     public void setInt(int index, int value) {
         buffer.setInt(index, value);
     }
 
     public void setLong(int index, long value) {
         buffer.setLong(index, value);
     }
 
     public void setBytes(int index, byte[] src, int srcIndex, int length) {
         buffer.setBytes(index, src, srcIndex, length);
     }
 
     public void setBytes(int index, ChannelBuffer src, int srcIndex, int length) {
         buffer.setBytes(index, src, srcIndex, length);
     }
 
     public void setBytes(int index, ByteBuffer src) {
         buffer.setBytes(index, src);
     }
 
     public void getBytes(int index, OutputStream out, int length)
             throws IOException {
         buffer.getBytes(index, out, length);
     }
 
     public int getBytes(int index, GatheringByteChannel out, int length)
             throws IOException {
         return buffer.getBytes(index, out, length);
     }
 
     public int setBytes(int index, InputStream in, int length)
             throws IOException {
         return buffer.setBytes(index, in, length);
     }
 
     public int setBytes(int index, ScatteringByteChannel in, int length)
             throws IOException {
         return buffer.setBytes(index, in, length);
     }
 
     public ByteBuffer toByteBuffer(int index, int length) {
         return buffer.toByteBuffer(index, length);
     }
 }