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1   /*
2    * Copyright 2014 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License, version 2.0 (the
5    * "License"); you may not use this file except in compliance with the License. You may obtain a
6    * copy of the License at:
7    *
8    * http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software distributed under the License
11   * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
12   * or implied. See the License for the specific language governing permissions and limitations under
13   * the License.
14   */
15  
16  package io.netty.handler.codec.mqtt;
17  
18  public enum MqttQoS {
19      AT_MOST_ONCE(0),
20      AT_LEAST_ONCE(1),
21      EXACTLY_ONCE(2),
22      FAILURE(0x80);
23  
24      private final int value;
25  
26      MqttQoS(int value) {
27          this.value = value;
28      }
29  
30      public int value() {
31          return value;
32      }
33  
34      public static MqttQoS valueOf(int value) {
35          for (MqttQoS q: values()) {
36              if (q.value == value) {
37                  return q;
38              }
39          }
40          throw new IllegalArgumentException("invalid QoS: " + value);
41      }
42  }