Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.commons.net.smtp; /*** * SMTPReply stores a set of constants for SMTP reply codes. To interpret * the meaning of the codes, familiarity with RFC 821 is assumed. * The mnemonic constant names are transcriptions from the code descriptions * of RFC 821. ***/ public final class SMTPReply { public static final int SYSTEM_STATUS = 211; public static final int HELP_MESSAGE = 214; public static final int SERVICE_READY = 220; public static final int SERVICE_CLOSING_TRANSMISSION_CHANNEL = 221; public static final int ACTION_OK = 250; public static final int USER_NOT_LOCAL_WILL_FORWARD = 251; public static final int START_MAIL_INPUT = 354; public static final int SERVICE_NOT_AVAILABLE = 421; public static final int ACTION_NOT_TAKEN = 450; public static final int ACTION_ABORTED = 451; public static final int INSUFFICIENT_STORAGE = 452; public static final int UNRECOGNIZED_COMMAND = 500; public static final int SYNTAX_ERROR_IN_ARGUMENTS = 501; public static final int COMMAND_NOT_IMPLEMENTED = 502; public static final int BAD_COMMAND_SEQUENCE = 503; public static final int COMMAND_NOT_IMPLEMENTED_FOR_PARAMETER = 504; public static final int MAILBOX_UNAVAILABLE = 550; public static final int USER_NOT_LOCAL = 551; public static final int STORAGE_ALLOCATION_EXCEEDED = 552; public static final int MAILBOX_NAME_NOT_ALLOWED = 553; public static final int TRANSACTION_FAILED = 554; // Cannot be instantiated private SMTPReply() { } /*** * Determine if a reply code is a positive preliminary response. All * codes beginning with a 1 are positive preliminary responses. * Postitive preliminary responses are used to indicate tentative success. * No further commands can be issued to the SMTP server after a positive * preliminary response until a follow up response is received from the * server. * <p> * <b> Note: </b> <em> No SMTP commands defined in RFC 822 provide this * type of reply. </em> * <p> * @param reply The reply code to test. * @return True if a reply code is a postive preliminary response, false * if not. ***/ public static boolean isPositivePreliminary(int reply) { return (reply >= 100 && reply < 200); } /*** * Determine if a reply code is a positive completion response. All * codes beginning with a 2 are positive completion responses. * The SMTP server will send a positive completion response on the final * successful completion of a command. * <p> * @param reply The reply code to test. * @return True if a reply code is a postive completion response, false * if not. ***/ public static boolean isPositiveCompletion(int reply) { return (reply >= 200 && reply < 300); } /*** * Determine if a reply code is a positive intermediate response. All * codes beginning with a 3 are positive intermediate responses. * The SMTP server will send a positive intermediate response on the * successful completion of one part of a multi-part sequence of * commands. For example, after a successful DATA command, a positive * intermediate response will be sent to indicate that the server is * ready to receive the message data. * <p> * @param reply The reply code to test. * @return True if a reply code is a postive intermediate response, false * if not. ***/ public static boolean isPositiveIntermediate(int reply) { return (reply >= 300 && reply < 400); } /*** * Determine if a reply code is a negative transient response. All * codes beginning with a 4 are negative transient responses. * The SMTP server will send a negative transient response on the * failure of a command that can be reattempted with success. * <p> * @param reply The reply code to test. * @return True if a reply code is a negative transient response, false * if not. ***/ public static boolean isNegativeTransient(int reply) { return (reply >= 400 && reply < 500); } /*** * Determine if a reply code is a negative permanent response. All * codes beginning with a 5 are negative permanent responses. * The SMTP server will send a negative permanent response on the * failure of a command that cannot be reattempted with success. * <p> * @param reply The reply code to test. * @return True if a reply code is a negative permanent response, false * if not. ***/ public static boolean isNegativePermanent(int reply) { return (reply >= 500 && reply < 600); } }