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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,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a 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
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  
17  package io.netty.handler.codec.mqtt;
18  
19  import io.netty.util.internal.StringUtil;
20  
21  import java.util.Collections;
22  import java.util.List;
23  
24  /**
25   * Payload of the {@link MqttUnsubscribeMessage}
26   */
27  public final class MqttUnsubscribePayload {
28  
29      private final List<String> topics;
30  
31      public MqttUnsubscribePayload(List<String> topics) {
32          this.topics = Collections.unmodifiableList(topics);
33      }
34  
35      public List<String> topics() {
36          return topics;
37      }
38  
39      @Override
40      public String toString() {
41          StringBuilder builder = new StringBuilder(StringUtil.simpleClassName(this)).append('[');
42          for (int i = 0; i < topics.size() - 1; i++) {
43              builder.append("topicName = ").append(topics.get(i)).append(", ");
44          }
45          builder.append("topicName = ").append(topics.get(topics.size() - 1))
46                 .append(']');
47          return builder.toString();
48      }
49  }