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    1   package org.apache.commons.net.smtp;
    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,
    42   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    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   * SMTPCommand stores a set of constants for SMTP command codes.  To interpret
    59   * the meaning of the codes, familiarity with RFC 821 is assumed.
    60   * The mnemonic constant names are transcriptions from the code descriptions
    61   * of RFC 821.  For those who think in terms of the actual SMTP commands,
    62   * a set of constants such as <a href="#HELO"> HELO </a> are provided
    63   * where the constant name is the same as the SMTP command.
    64   * <p>
    65   * <p>
    66   * @author Daniel F. Savarese
    67   ***/
    68
    69  public final class SMTPCommand
    70  {
    71
    72
    73      public static final int HELO = 0;
    74      public static final int MAIL = 1;
    75      public static final int RCPT = 2;
    76      public static final int DATA = 3;
    77      public static final int SEND = 4;
    78      public static final int SOML = 5;
    79      public static final int SAML = 6;
    80      public static final int RSET = 7;
    81      public static final int VRFY = 8;
    82      public static final int EXPN = 9;
    83      public static final int HELP = 10;
    84      public static final int NOOP = 11;
    85      public static final int TURN = 12;
    86      public static final int QUIT = 13;
    87
    88      public static final int HELLO = HELO;
    89      public static final int LOGIN = HELO;
    90      public static final int MAIL_FROM = MAIL;
    91      public static final int RECIPIENT = RCPT;
    92      public static final int SEND_MESSAGE_DATA = DATA;
    93      public static final int SEND_FROM = SEND;
    94      public static final int SEND_OR_MAIL_FROM = SOML;
    95      public static final int SEND_AND_MAIL_FROM = SAML;
    96      public static final int RESET = RSET;
    97      public static final int VERIFY = VRFY;
    98      public static final int EXPAND = EXPN;
    99      // public static final int HELP = HELP;
    100     // public static final int NOOP = NOOP;
    101     // public static final int TURN = TURN;
    102     // public static final int QUIT = QUIT;
    103     public static final int LOGOUT = QUIT;
    104
    105     // Cannot be instantiated
    106     private SMTPCommand()
    107     {}
    108
    109     static final String[] _commands = {
    110                                           "HELO", "MAIL FROM:", "RCPT TO:", "DATA", "SEND FROM:", "SOML FROM:",
    111                                           "SAML FROM:", "RSET", "VRFY", "EXPN", "HELP", "NOOP", "TURN", "QUIT"
    112                                       };
    113
    114
    115     /****
    116      * Retrieve the SMTP protocol command string corresponding to a specified
    117      * command code.
    118      * <p>
    119      * @param The command code.
    120      * @return The SMTP protcol command string corresponding to a specified
    121      *         command code.
    122      ***/
    123     public static final String getCommand(int command)
    124     {
    125         return _commands[command];
    126     }
    127
    128 }

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