/*
    * 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.util.internal.ObjectUtil;
  import io.netty.util.internal.StringUtil;
  
  /**
   * See <a href="https://public.dhe.ibm.com/software/dw/webservices/ws-mqtt/mqtt-v3r1.html#fixed-header">
   *     MQTTV3.1/fixed-header</a>
   */
  public final class MqttFixedHeader {
  
      private final MqttMessageType messageType;
      private final boolean isDup;
      private final MqttQoS qosLevel;
      private final boolean isRetain;
      private final int remainingLength;
  
      public MqttFixedHeader(
              MqttMessageType messageType,
              boolean isDup,
              MqttQoS qosLevel,
              boolean isRetain,
              int remainingLength) {
          this.messageType = ObjectUtil.checkNotNull(messageType, "messageType");
          this.isDup = isDup;
          this.qosLevel = ObjectUtil.checkNotNull(qosLevel, "qosLevel");
          this.isRetain = isRetain;
          this.remainingLength = remainingLength;
      }
  
      public MqttMessageType messageType() {
          return messageType;
      }
  
      public boolean isDup() {
          return isDup;
      }
  
      public MqttQoS qosLevel() {
          return qosLevel;
      }
  
      public boolean isRetain() {
          return isRetain;
      }
  
      public int remainingLength() {
          return remainingLength;
      }
  
      @Override
      public String toString() {
          return new StringBuilder(StringUtil.simpleClassName(this))
              .append('[')
              .append("messageType=").append(messageType)
              .append(", isDup=").append(isDup)
              .append(", qosLevel=").append(qosLevel)
              .append(", isRetain=").append(isRetain)
              .append(", remainingLength=").append(remainingLength)
              .append(']')
              .toString();
      }
  }