commons-net.jar Source Code

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:

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org/apache/commons/net/io/CopyStreamAdapter.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.io;

import java.util.EventListener;

import org.apache.commons.net.util.ListenerList;

/**
 * The CopyStreamAdapter will relay CopyStreamEvents to a list of listeners
 * when either of its bytesTransferred() methods are called.  Its purpose
 * is to facilitate the notification of the progress of a copy operation
 * performed by one of the static copyStream() methods in
 * org.apache.commons.io.Util to multiple listeners.  The static
 * copyStream() methods invoke the
 * bytesTransfered(long, int) of a CopyStreamListener for performance
 * reasons and also because multiple listeners cannot be registered given
 * that the methods are static.
 *
 *
 * @see CopyStreamEvent
 * @see CopyStreamListener
 * @see Util
 */
public class CopyStreamAdapter implements CopyStreamListener
{
    private final ListenerList internalListeners;

    /**
     * Creates a new copyStreamAdapter.
     */
    public CopyStreamAdapter()
    {
        internalListeners = new ListenerList();
    }

    /**
     * This method is invoked by a CopyStreamEvent source after copying
     * a block of bytes from a stream.  The CopyStreamEvent will contain
     * the total number of bytes transferred so far and the number of bytes
     * transferred in the last write.  The CopyStreamAdapater will relay
     * the event to all of its registered listeners, listing itself as the
     * source of the event.
     * @param event The CopyStreamEvent fired by the copying of a block of
     *              bytes.
     */
    @Override
    public void bytesTransferred(final CopyStreamEvent event)
    {
        for (final EventListener listener : internalListeners)
        {
            ((CopyStreamListener) listener).bytesTransferred(event);
        }
    }

    /**
     * This method is not part of the JavaBeans model and is used by the
     * static methods in the org.apache.commons.io.Util class for efficiency.
     * It is invoked after a block of bytes to inform the listener of the
     * transfer.  The CopyStreamAdapater will create a CopyStreamEvent
     * from the arguments and relay the event to all of its registered
     * listeners, listing itself as the source of the event.
     * @param totalBytesTransferred  The total number of bytes transferred
     *         so far by the copy operation.
     * @param bytesTransferred  The number of bytes copied by the most recent
     *          write.
     * @param streamSize The number of bytes in the stream being copied.
     *        This may be equal to CopyStreamEvent.UNKNOWN_STREAM_SIZE if
     *        the size is unknown.
     */
    @Override
    public void bytesTransferred(final long totalBytesTransferred,
                                 final int bytesTransferred, final long streamSize)
    {
        for (final EventListener listener : internalListeners)
        {
            ((CopyStreamListener) listener).bytesTransferred(
                    totalBytesTransferred, bytesTransferred, streamSize);
        }
    }

    /**
     * Registers a CopyStreamListener to receive CopyStreamEvents.
     * Although this method is not declared to be synchronized, it is
     * implemented in a thread safe manner.
     * @param listener  The CopyStreamlistener to register.
     */
    public void addCopyStreamListener(final CopyStreamListener listener)
    {
        internalListeners.addListener(listener);
    }

    /**
     * Unregisters a CopyStreamListener.  Although this method is not
     * synchronized, it is implemented in a thread safe manner.
     * @param listener  The CopyStreamlistener to unregister.
     */
    public void removeCopyStreamListener(final CopyStreamListener listener)
    {
        internalListeners.removeListener(listener);
    }
}

org/apache/commons/net/io/CopyStreamAdapter.java

 

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