1 package org.apache.commons.net.pop3;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache Commons" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56
57 /****
58 * POP3Command stores POP3 command code constants.
59 * <p>
60 * <p>
61 * @author Daniel F. Savarese
62 ***/
63
64 public final class POP3Command
65 {
66 /**** Send user name. ***/
67 public static final int USER = 0;
68 /**** Send password. ***/
69 public static final int PASS = 1;
70 /**** Quit session. ***/
71 public static final int QUIT = 2;
72 /**** Get status. ***/
73 public static final int STAT = 3;
74 /**** List message(s). ***/
75 public static final int LIST = 4;
76 /**** Retrieve message(s). ***/
77 public static final int RETR = 5;
78 /**** Delete message(s). ***/
79 public static final int DELE = 6;
80 /**** No operation. Used as a session keepalive. ***/
81 public static final int NOOP = 7;
82 /**** Reset session. ***/
83 public static final int RSET = 8;
84 /**** Authorization. ***/
85 public static final int APOP = 9;
86 /**** Retrieve top number lines from message. ***/
87 public static final int TOP = 10;
88 /**** List unique message identifier(s). ***/
89 public static final int UIDL = 11;
90
91 static final String[] _commands = {
92 "USER", "PASS", "QUIT", "STAT", "LIST", "RETR", "DELE", "NOOP", "RSET",
93 "APOP", "TOP", "UIDL"
94 };
95
96 // Cannot be instantiated.
97 private POP3Command()
98 {}
99
100 /****
101 * Get the POP3 protocol string command corresponding to a command code.
102 * <p>
103 * @return The POP3 protocol string command corresponding to a command code.
104 ***/
105 public static final String getCommand(int command)
106 {
107 return _commands[command];
108 }
109 }
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