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Java > Open Source Codes > org > apache > commons > net > smtp > SMTPCommand


1 /*
2  * Copyright 2001-2005 The Apache Software Foundation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * 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,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package org.apache.commons.net.smtp;
17
18 /***
19  * SMTPCommand stores a set of constants for SMTP command codes. To interpret
20  * the meaning of the codes, familiarity with RFC 821 is assumed.
21  * The mnemonic constant names are transcriptions from the code descriptions
22  * of RFC 821. For those who think in terms of the actual SMTP commands,
23  * a set of constants such as {@link #HELO HELO } are provided
24  * where the constant name is the same as the SMTP command.
25  * <p>
26  * <p>
27  * @author Daniel F. Savarese
28  ***/
29
30 public final class SMTPCommand
31 {
32
33
34     public static final int HELO = 0;
35     public static final int MAIL = 1;
36     public static final int RCPT = 2;
37     public static final int DATA = 3;
38     public static final int SEND = 4;
39     public static final int SOML = 5;
40     public static final int SAML = 6;
41     public static final int RSET = 7;
42     public static final int VRFY = 8;
43     public static final int EXPN = 9;
44     public static final int HELP = 10;
45     public static final int NOOP = 11;
46     public static final int TURN = 12;
47     public static final int QUIT = 13;
48
49     public static final int HELLO = HELO;
50     public static final int LOGIN = HELO;
51     public static final int MAIL_FROM = MAIL;
52     public static final int RECIPIENT = RCPT;
53     public static final int SEND_MESSAGE_DATA = DATA;
54     public static final int SEND_FROM = SEND;
55     public static final int SEND_OR_MAIL_FROM = SOML;
56     public static final int SEND_AND_MAIL_FROM = SAML;
57     public static final int RESET = RSET;
58     public static final int VERIFY = VRFY;
59     public static final int EXPAND = EXPN;
60     // public static final int HELP = HELP;
61 // public static final int NOOP = NOOP;
62 // public static final int TURN = TURN;
63 // public static final int QUIT = QUIT;
64 public static final int LOGOUT = QUIT;
65
66     // Cannot be instantiated
67 private SMTPCommand()
68     {}
69
70     static final String JavaDoc[] _commands = {
71                                           "HELO", "MAIL FROM:", "RCPT TO:", "DATA", "SEND FROM:", "SOML FROM:",
72                                           "SAML FROM:", "RSET", "VRFY", "EXPN", "HELP", "NOOP", "TURN", "QUIT"
73                                       };
74
75
76     /***
77      * Retrieve the SMTP protocol command string corresponding to a specified
78      * command code.
79      * <p>
80      * @param command The command code.
81      * @return The SMTP protcol command string corresponding to a specified
82      * command code.
83      ***/
84     public static final String JavaDoc getCommand(int command)
85     {
86         return _commands[command];
87     }
88
89 }
90
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