1. /*
  2. * Copyright 2001-2004 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. * SMTPCommand stores a set of constants for SMTP command codes. To interpret
  19. * the meaning of the codes, familiarity with RFC 821 is assumed.
  20. * The mnemonic constant names are transcriptions from the code descriptions
  21. * of RFC 821. For those who think in terms of the actual SMTP commands,
  22. * a set of constants such as <a href="#HELO"> HELO </a> are provided
  23. * where the constant name is the same as the SMTP command.
  24. * <p>
  25. * <p>
  26. * @author Daniel F. Savarese
  27. ***/
  28. public final class SMTPCommand
  29. {
  30. public static final int HELO = 0;
  31. public static final int MAIL = 1;
  32. public static final int RCPT = 2;
  33. public static final int DATA = 3;
  34. public static final int SEND = 4;
  35. public static final int SOML = 5;
  36. public static final int SAML = 6;
  37. public static final int RSET = 7;
  38. public static final int VRFY = 8;
  39. public static final int EXPN = 9;
  40. public static final int HELP = 10;
  41. public static final int NOOP = 11;
  42. public static final int TURN = 12;
  43. public static final int QUIT = 13;
  44. public static final int HELLO = HELO;
  45. public static final int LOGIN = HELO;
  46. public static final int MAIL_FROM = MAIL;
  47. public static final int RECIPIENT = RCPT;
  48. public static final int SEND_MESSAGE_DATA = DATA;
  49. public static final int SEND_FROM = SEND;
  50. public static final int SEND_OR_MAIL_FROM = SOML;
  51. public static final int SEND_AND_MAIL_FROM = SAML;
  52. public static final int RESET = RSET;
  53. public static final int VERIFY = VRFY;
  54. public static final int EXPAND = EXPN;
  55. // public static final int HELP = HELP;
  56. // public static final int NOOP = NOOP;
  57. // public static final int TURN = TURN;
  58. // public static final int QUIT = QUIT;
  59. public static final int LOGOUT = QUIT;
  60. // Cannot be instantiated
  61. private SMTPCommand()
  62. {}
  63. static final String[] _commands = {
  64. "HELO", "MAIL FROM:", "RCPT TO:", "DATA", "SEND FROM:", "SOML FROM:",
  65. "SAML FROM:", "RSET", "VRFY", "EXPN", "HELP", "NOOP", "TURN", "QUIT"
  66. };
  67. /***
  68. * Retrieve the SMTP protocol command string corresponding to a specified
  69. * command code.
  70. * <p>
  71. * @param command The command code.
  72. * @return The SMTP protcol command string corresponding to a specified
  73. * command code.
  74. ***/
  75. public static final String getCommand(int command)
  76. {
  77. return _commands[command];
  78. }
  79. }