transportadvertisement.java

jxta_src_2.41b jxta 2.41b 最新版源码 from www.jxta.org

/*
 * Copyright (c) 2001 Sun Microsystems, Inc.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *       Sun Microsystems, Inc. for Project JXTA."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact Project JXTA at http://www.jxta.org.
 *
 * 5. Products derived from this software may not be called "JXTA",
 *    nor may "JXTA" appear in their name, without prior written
 *    permission of Sun.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL SUN MICROSYSTEMS OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Project JXTA.  For more
 * information on Project JXTA, please see
 * <http://www.jxta.org/>.
 *
 * This license is based on the BSD license adopted by the Apache Foundation.
 *
 * $Id: TransportAdvertisement.java,v 1.20 2005/11/21 19:50:59 bondolo Exp $
 */


package net.jxta.protocol;

import net.jxta.document.ExtendableAdvertisement;
import net.jxta.id.ID;

/**
 * This abstract class defines a Transport advertisement. Each peer endpoint
 * protocol is associated with a transport advertisement that describes the
 * protocol and network interface associated with the endpoint transport. For
 * example for TCP endpoint. the following transport information needs to be
 * maintained for this endpoint:
 *
 * <p>Transport :
 * <ul type-disc>
 * <li><p>Protocol : TCP
 * <li><p>Port : 6001
 * <li><p>MulticastAddr : 224.0.1.85
 * <li><p>MulticastPort : 1234
 * <li><p>MulticastSize : 8192
 *</ul>
 *
 *<p>This class is an abstract class that needs to be extended by implementation
 * to support the different types of transport advertisements (TCP, HTTP, etc)
 *
 *<pre>
 * &lt;?xml version="1.0"?>
 *  &lt;TransportAdvertisement type="HTTPAdvertisement">
 *          ..........
 *  &lt;/TransportAdvertisement>
 *</pre>
 *
 * @see net.jxta.protocol.AccessPointAdvertisement
 */


public abstract class TransportAdvertisement extends ExtendableAdvertisement {
    
    protected String protocol = null;
    
    /**
     *  Returns the identifying type of this Advertisement.
     *
     * @return String the type of advertisement
     **/
    public static String getAdvertisementType() {
        return "jxta:TransportAdvertisement" ;
    }
    
    /**
     * {@inheritDoc}
     **/
    public final String getBaseAdvType() {
        return getAdvertisementType();
    }
    
    /**
     *  Return ID for indexing. We don't have one so return the nullID.
     *
     *  @return jxta id associated with this advertisement.
     **/
    public ID getID() {
        return ID.nullID;
    }
    
    /**
     * Sets the URI scheme to be used for EndpointAddresses of this Message Transport.
     *
     * @return  The URI scheme used for EndpointAddresses of this Message Transport.
     *
     **/
    public String getProtocol() {
        return protocol;
    }
    
    /**
     * Returns the URI scheme to be used for EndpointAddresses of this Message Transport.
     *
     * @param protocol The URI scheme used for EndpointAddresses of this Message Transport.
     *
     **/
    public void setProtocol(String protocol) {
        this.protocol = protocol;
    }
}