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/ProtocolCommandSupport.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;

import java.io.Serializable;
import java.util.EventListener;

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

/**
 * ProtocolCommandSupport is a convenience class for managing a list of
 * ProtocolCommandListeners and firing ProtocolCommandEvents.  You can
 * simply delegate ProtocolCommandEvent firing and listener
 * registering/unregistering tasks to this class.
 *
 *
 * @see ProtocolCommandEvent
 * @see ProtocolCommandListener
 */

public class ProtocolCommandSupport implements Serializable
{
    private static final long serialVersionUID = -8017692739988399978L;

    private final Object source;
    private final ListenerList listeners;

    /**
     * Creates a ProtocolCommandSupport instance using the indicated source
     * as the source of ProtocolCommandEvents.
     *
     * @param source  The source to use for all generated ProtocolCommandEvents.
     */
    public ProtocolCommandSupport(final Object source)
    {
        this.listeners = new ListenerList();
        this.source = source;
    }


    /**
     * Fires a ProtocolCommandEvent signalling the sending of a command to all
     * registered listeners, invoking their
     * {@link org.apache.commons.net.ProtocolCommandListener#protocolCommandSent protocolCommandSent() }
     *  methods.
     *
     * @param command The string representation of the command type sent, not
     *      including the arguments (e.g., "STAT" or "GET").
     * @param message The entire command string verbatim as sent to the server,
     *        including all arguments.
     */
    public void fireCommandSent(final String command, final String message)
    {
        final ProtocolCommandEvent event;

        event = new ProtocolCommandEvent(source, command, message);

        for (final EventListener listener : listeners)
        {
           ((ProtocolCommandListener)listener).protocolCommandSent(event);
        }
    }

    /**
     * Fires a ProtocolCommandEvent signalling the reception of a command reply
     * to all registered listeners, invoking their
     * {@link org.apache.commons.net.ProtocolCommandListener#protocolReplyReceived protocolReplyReceived() }
     *  methods.
     *
     * @param replyCode The integer code indicating the natureof the reply.
     *   This will be the protocol integer value for protocols
     *   that use integer reply codes, or the reply class constant
     *   corresponding to the reply for protocols like POP3 that use
     *   strings like OK rather than integer codes (i.e., POP3Repy.OK).
     * @param message The entire reply as received from the server.
     */
    public void fireReplyReceived(final int replyCode, final String message)
    {
        final ProtocolCommandEvent event;
        event = new ProtocolCommandEvent(source, replyCode, message);

        for (final EventListener listener : listeners)
        {
            ((ProtocolCommandListener)listener).protocolReplyReceived(event);
        }
    }

    /**
     * Adds a ProtocolCommandListener.
     *
     * @param listener  The ProtocolCommandListener to add.
     */
    public void addProtocolCommandListener(final ProtocolCommandListener listener)
    {
        listeners.addListener(listener);
    }

    /**
     * Removes a ProtocolCommandListener.
     *
     * @param listener  The ProtocolCommandListener to remove.
     */
    public void removeProtocolCommandListener(final ProtocolCommandListener listener)
    {
        listeners.removeListener(listener);
    }


    /**
     * Returns the number of ProtocolCommandListeners currently registered.
     *
     * @return The number of ProtocolCommandListeners currently registered.
     */
    public int getListenerCount()
    {
        return listeners.getListenerCount();
    }

}

⏎ org/apache/commons/net/ProtocolCommandSupport.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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