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 }