commons-net.jar is the bytecode of Apache Commons Net library, which implements the client side of many basic Internet protocols.

Apache Commons Net Source Code files are provided in the binary packge (commons-net-3.8.0-bin.zip). You can download it at Apache Commons Net Website.

The source code of commons-net-3.8.0.jar is provided below:

⏎ org/apache/commons/net/smtp/SMTPReply.java

/*
 * 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 positive preliminary response, false
     *         if not.
     */
    public static boolean isPositivePreliminary(final 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 positive completion response, false
     *         if not.
     */
    public static boolean isPositiveCompletion(final 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 positive intermediate response, false
     *         if not.
     */
    public static boolean isPositiveIntermediate(final 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(final 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(final int reply)
    {
        return reply >= 500 && reply < 600;
    }

}

⏎ org/apache/commons/net/smtp/SMTPReply.java

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File name: commons-net-3.8.0-sources.jar
File size: 437325 bytes
Release date: 2020-01-22
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