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.pop3; 19 20 /*** 21 * POP3Command stores POP3 command code constants. 22 * <p> 23 * <p> 24 * @author Daniel F. Savarese 25 ***/ 26 27 public final class POP3Command 28 { 29 /*** Send user name. ***/ 30 public static final int USER = 0; 31 /*** Send password. ***/ 32 public static final int PASS = 1; 33 /*** Quit session. ***/ 34 public static final int QUIT = 2; 35 /*** Get status. ***/ 36 public static final int STAT = 3; 37 /*** List message(s). ***/ 38 public static final int LIST = 4; 39 /*** Retrieve message(s). ***/ 40 public static final int RETR = 5; 41 /*** Delete message(s). ***/ 42 public static final int DELE = 6; 43 /*** No operation. Used as a session keepalive. ***/ 44 public static final int NOOP = 7; 45 /*** Reset session. ***/ 46 public static final int RSET = 8; 47 /*** Authorization. ***/ 48 public static final int APOP = 9; 49 /*** Retrieve top number lines from message. ***/ 50 public static final int TOP = 10; 51 /*** List unique message identifier(s). ***/ 52 public static final int UIDL = 11; 53 54 static final String[] _commands = { 55 "USER", "PASS", "QUIT", "STAT", "LIST", "RETR", "DELE", "NOOP", "RSET", 56 "APOP", "TOP", "UIDL" 57 }; 58 59 // Cannot be instantiated. 60 private POP3Command() 61 {} 62 63 /*** 64 * Get the POP3 protocol string command corresponding to a command code. 65 * <p> 66 * @return The POP3 protocol string command corresponding to a command code. 67 ***/ 68 public static final String getCommand(int command) 69 { 70 return _commands[command]; 71 } 72 }