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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one
3    *  or more contributor license agreements.  See the NOTICE file
4    *  distributed with this work for additional information
5    *  regarding copyright ownership.  The ASF licenses this file
6    *  to you under the Apache License, Version 2.0 (the
7    *  "License"); you may not use this file except in compliance
8    *  with the License.  You may obtain a copy of the License at
9    *
10   *    http://www.apache.org/licenses/LICENSE-2.0
11   *
12   *  Unless required by applicable law or agreed to in writing,
13   *  software distributed under the License is distributed on an
14   *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15   *  KIND, either express or implied.  See the License for the
16   *  specific language governing permissions and limitations
17   *  under the License.
18   *
19   */
20  package org.apache.mina.example.chat;
21  
22  /**
23   * Encapsulates a chat command. Use {@link #valueOf(String)} to create an
24   * instance given a command string.
25   *
26   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
27   */
28  public class ChatCommand {
29      public static final int LOGIN = 0;
30  
31      public static final int QUIT = 1;
32  
33      public static final int BROADCAST = 2;
34  
35      private final int num;
36  
37      private ChatCommand(int num) {
38          this.num = num;
39      }
40  
41      public int toInt() {
42          return num;
43      }
44  
45      public static ChatCommand valueOf(String s) {
46          s = s.toUpperCase();
47          if ("LOGIN".equals(s)) {
48              return new ChatCommand(LOGIN);
49          }
50          if ("QUIT".equals(s)) {
51              return new ChatCommand(QUIT);
52          }
53          if ("BROADCAST".equals(s)) {
54              return new ChatCommand(BROADCAST);
55          }
56  
57          throw new IllegalArgumentException("Unrecognized command: " + s);
58      }
59  }