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Java > Open Source Codes > org > apache > mina > example > chat > ChatCommand


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 The Apache Directory Project (mina-dev@directory.apache.org)
27  * @version $Rev$, $Date$
28  */
29 public class ChatCommand {
30     public static final int LOGIN = 0;
31
32     public static final int QUIT = 1;
33
34     public static final int BROADCAST = 2;
35
36     private final int num;
37
38     private ChatCommand(int num) {
39         this.num = num;
40     }
41
42     public int toInt() {
43         return num;
44     }
45
46     public static ChatCommand valueOf(String JavaDoc s) {
47         s = s.toUpperCase();
48         if ("LOGIN".equals(s)) {
49             return new ChatCommand(LOGIN);
50         }
51         if ("QUIT".equals(s)) {
52             return new ChatCommand(QUIT);
53         }
54         if ("BROADCAST".equals(s)) {
55             return new ChatCommand(BROADCAST);
56         }
57
58         throw new IllegalArgumentException JavaDoc("Unrecognized command: " + s);
59     }
60 }
61
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