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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
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64 public static final int LOGOUT = QUIT;
65
66
67 private SMTPCommand()
68 {}
69
70 static final String[] _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 getCommand(int command)
85 {
86 return _commands[command];
87 }
88
89 }