    001    /*
    002     * Licensed to the Apache Software Foundation (ASF) under one or more
    003     * contributor license agreements.  See the NOTICE file distributed with
    004     * this work for additional information regarding copyright ownership.
    005     * The ASF licenses this file to You under the Apache License, Version 2.0
    006     * (the "License"); you may not use this file except in compliance with
    007     * the License.  You may obtain a copy of the License at
    008     *
    009     *      http://www.apache.org/licenses/LICENSE-2.0
    010     *
    011     * Unless required by applicable law or agreed to in writing, software
    012     * distributed under the License is distributed on an "AS IS" BASIS,
    013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014     * See the License for the specific language governing permissions and
    015     * limitations under the License.
    016     */
    017
    018    package org.apache.commons.net.ftp;
    019    import java.io.IOException;
    020
    021    /***
    022     * FTPConnectionClosedException is used to indicate the premature or
    023     * unexpected closing of an FTP connection resulting from a
    024     * {@link org.apache.commons.net.ftp.FTPReply#SERVICE_NOT_AVAILABLE FTPReply.SERVICE_NOT_AVAILABLE }
    025     *  response (FTP reply code 421) to a
    026     * failed FTP command.  This exception is derived from IOException and
    027     * therefore may be caught either as an IOException or specifically as an
    028     * FTPConnectionClosedException.
    029     * <p>
    030     * <p>
    031     * @see FTP
    032     * @see FTPClient
    033     ***/
    034
    035    public class FTPConnectionClosedException extends IOException
    036    {
    037
    038        private static final long serialVersionUID = 3500547241659379952L;
    039
    040        /*** Constructs a FTPConnectionClosedException with no message ***/
    041        public FTPConnectionClosedException()
    042        {
    043            super();
    044        }
    045
    046        /***
    047         * Constructs a FTPConnectionClosedException with a specified message.
    048         * <p>
    049         * @param message  The message explaining the reason for the exception.
    050         ***/
    051        public FTPConnectionClosedException(String message)
    052        {
    053            super(message);
    054        }
    055
    056    }