    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.io;
    019
    020    import java.util.EventObject;
    021
    022    /**
    023     * A CopyStreamEvent is triggered after every write performed by a
    024     * stream copying operation.  The event stores the number of bytes
    025     * transferred by the write triggering the event as well as the total
    026     * number of bytes transferred so far by the copy operation.
    027     * <p>
    028     * <p>
    029     * @see CopyStreamListener
    030     * @see CopyStreamAdapter
    031     * @see Util
    032     * @version $Id: CopyStreamEvent.java 1088720 2011-04-04 18:52:00Z dfs $
    033     */
    034    public class CopyStreamEvent extends EventObject
    035    {
    036        private static final long serialVersionUID = -964927635655051867L;
    037
    038        /**
    039         * Constant used to indicate the stream size is unknown.
    040         */
    041        public static final long UNKNOWN_STREAM_SIZE = -1;
    042
    043        private final int bytesTransferred;
    044        private final long totalBytesTransferred;
    045        private final long streamSize;
    046
    047        /**
    048         * Creates a new CopyStreamEvent instance.
    049         * @param source  The source of the event.
    050         * @param totalBytesTransferred The total number of bytes transferred so
    051         *   far during a copy operation.
    052         * @param bytesTransferred  The number of bytes transferred during the
    053         *        write that triggered the CopyStreamEvent.
    054         * @param streamSize  The number of bytes in the stream being copied.
    055         *          This may be set to <code>UNKNOWN_STREAM_SIZE</code> if the
    056         *          size is unknown.
    057         */
    058        public CopyStreamEvent(Object source, long totalBytesTransferred,
    059                               int bytesTransferred, long streamSize)
    060        {
    061            super(source);
    062            this.bytesTransferred = bytesTransferred;
    063            this.totalBytesTransferred = totalBytesTransferred;
    064            this.streamSize = streamSize;
    065        }
    066
    067        /**
    068         * Returns the number of bytes transferred by the write that triggered
    069         * the event.
    070         * @return The number of bytes transferred by the write that triggered
    071         * the vent.
    072         */
    073        public int getBytesTransferred()
    074        {
    075            return bytesTransferred;
    076        }
    077
    078        /**
    079         * Returns the total number of bytes transferred so far by the copy
    080         * operation.
    081         * @return The total number of bytes transferred so far by the copy
    082         * operation.
    083         */
    084        public long getTotalBytesTransferred()
    085        {
    086            return totalBytesTransferred;
    087        }
    088
    089        /**
    090         * Returns the size of the stream being copied.
    091         * This may be set to <code>UNKNOWN_STREAM_SIZE</code> if the
    092         * size is unknown.
    093         * @return The size of the stream being copied.
    094         */
    095        public long getStreamSize()
    096        {
    097            return streamSize;
    098        }
    099
    100        /**
    101          * @since 3.0
    102         */
    103        @Override
    104        public String toString(){
    105            return getClass().getName() + "[source=" + source
    106            + ", total=" + totalBytesTransferred
    107            + ", bytes=" + bytesTransferred
    108            + ", size=" + streamSize
    109            + "]";
    110        }
    111    }