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   /*
    * Copyright 2014 The Netty Project
    *
    * The Netty Project 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:
    *
    *   https://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 io.netty.handler.codec.mqtt;
  
  import io.netty.buffer.ByteBuf;
  import io.netty.buffer.ByteBufHolder;
  import io.netty.buffer.ByteBufUtil;
  
  /**
   * See <a href="https://public.dhe.ibm.com/software/dw/webservices/ws-mqtt/mqtt-v3r1.html#publish">MQTTV3.1/publish</a>
   */
  public class MqttPublishMessage extends MqttMessage implements ByteBufHolder {
  
      public MqttPublishMessage(
              MqttFixedHeader mqttFixedHeader,
              MqttPublishVariableHeader variableHeader,
              ByteBuf payload) {
          super(mqttFixedHeader, variableHeader, payload);
      }
  
      @Override
      public MqttPublishVariableHeader variableHeader() {
          return (MqttPublishVariableHeader) super.variableHeader();
      }
  
      @Override
      public ByteBuf payload() {
          return content();
      }
  
      @Override
      public ByteBuf content() {
          return ByteBufUtil.ensureAccessible((ByteBuf) super.payload());
      }
  
      @Override
      public MqttPublishMessage copy() {
          return replace(content().copy());
      }
  
      @Override
      public MqttPublishMessage duplicate() {
          return replace(content().duplicate());
      }
  
      @Override
      public MqttPublishMessage retainedDuplicate() {
          return replace(content().retainedDuplicate());
      }
  
      @Override
      public MqttPublishMessage replace(ByteBuf content) {
          return new MqttPublishMessage(fixedHeader(), variableHeader(), content);
      }
  
      @Override
      public int refCnt() {
          return content().refCnt();
      }
  
      @Override
      public MqttPublishMessage retain() {
          content().retain();
          return this;
      }
  
      @Override
      public MqttPublishMessage retain(int increment) {
          content().retain(increment);
          return this;
      }
  
      @Override
      public MqttPublishMessage touch() {
          content().touch();
          return this;
      }
  
      @Override
      public MqttPublishMessage touch(Object hint) {
          content().touch(hint);
          return this;
      }
  
      @Override
     public boolean release() {
         return content().release();
     }
 
     @Override
     public boolean release(int decrement) {
         return content().release(decrement);
     }
 
 }