1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.net.smtp;
19
20 /***
21 * SMTPCommand stores a set of constants for SMTP command codes. To interpret
22 * the meaning of the codes, familiarity with RFC 821 is assumed.
23 * The mnemonic constant names are transcriptions from the code descriptions
24 * of RFC 821. For those who think in terms of the actual SMTP commands,
25 * a set of constants such as {@link #HELO HELO } are provided
26 * where the constant name is the same as the SMTP command.
27 * <p>
28 * <p>
29 * @author Daniel F. Savarese
30 ***/
31
32 public final class SMTPCommand
33 {
34
35
36 public static final int HELO = 0;
37 public static final int MAIL = 1;
38 public static final int RCPT = 2;
39 public static final int DATA = 3;
40 public static final int SEND = 4;
41 public static final int SOML = 5;
42 public static final int SAML = 6;
43 public static final int RSET = 7;
44 public static final int VRFY = 8;
45 public static final int EXPN = 9;
46 public static final int HELP = 10;
47 public static final int NOOP = 11;
48 public static final int TURN = 12;
49 public static final int QUIT = 13;
50
51 public static final int HELLO = HELO;
52 public static final int LOGIN = HELO;
53 public static final int MAIL_FROM = MAIL;
54 public static final int RECIPIENT = RCPT;
55 public static final int SEND_MESSAGE_DATA = DATA;
56 public static final int SEND_FROM = SEND;
57 public static final int SEND_OR_MAIL_FROM = SOML;
58 public static final int SEND_AND_MAIL_FROM = SAML;
59 public static final int RESET = RSET;
60 public static final int VERIFY = VRFY;
61 public static final int EXPAND = EXPN;
62 // public static final int HELP = HELP;
63 // public static final int NOOP = NOOP;
64 // public static final int TURN = TURN;
65 // public static final int QUIT = QUIT;
66 public static final int LOGOUT = QUIT;
67
68 // Cannot be instantiated
69 private SMTPCommand()
70 {}
71
72 static final String[] _commands = {
73 "HELO", "MAIL FROM:", "RCPT TO:", "DATA", "SEND FROM:", "SOML FROM:",
74 "SAML FROM:", "RSET", "VRFY", "EXPN", "HELP", "NOOP", "TURN", "QUIT"
75 };
76
77
78 /***
79 * Retrieve the SMTP protocol command string corresponding to a specified
80 * command code.
81 * <p>
82 * @param command The command code.
83 * @return The SMTP protcol command string corresponding to a specified
84 * command code.
85 ***/
86 public static final String getCommand(int command)
87 {
88 return _commands[command];
89 }
90
91 }