peerviewdestination.java

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

/*
 * Copyright (c) 2004 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: PeerViewDestination.java,v 1.2 2005/12/15 16:55:19 hamada Exp $
 */
package net.jxta.impl.rendezvous.rpv;

import net.jxta.endpoint.EndpointAddress;
import net.jxta.id.ID;

/**
 * This class contains only the comparable portion of PeerViewElement, so that it is possible
 * to search for elements in the sorted set that the local PeerView is, without having
 * enough information to create a valid PeerViewElement.
 */
public class PeerViewDestination implements Comparable {

    /**
     * An explicit endpoint address. This is normally a peerID based address but we happen
     * to need it more often in the address form (it has also occured in the past that it could
     * usefully be a real transport address).
     */
    private EndpointAddress destAddress = null;

    /**
     * Constructs a PeerViewDestination from the given endpoint address.
     */
    public PeerViewDestination(EndpointAddress addr) {
        destAddress = addr;
    }

    /**
     * Constructs a PeerViewDestination from a (peer)ID.
     */
    public PeerViewDestination(ID peerId) {
        destAddress = new EndpointAddress("jxta", peerId.getUniqueValue().toString(), null, null);
    }

    /**
     * returns the destination address.
     */
    public EndpointAddress getDestAddress() {
        return destAddress;
    }

    /**
     * {@inheritDoc}
     *
     * Note that only the protocol address and at a lower order the protocol name are considered
     * for comparision.
     */
    public int compareTo(Object other) {
        PeerViewDestination pve = (PeerViewDestination) other;

        int result = destAddress.getProtocolAddress().compareTo(pve.destAddress.getProtocolAddress());

        if (result != 0) {
            return result;
        }

        return destAddress.getProtocolName().compareTo(pve.destAddress.getProtocolName());
    }

    /**
     *  {@inheritDoc}
     */
    public boolean equals(Object other) {

        if (null == other) {
            return false;
        }
        if (this == other) {
            return true;
        }
        return 0 == compareTo(other);
    }

    /**
     *  {@inheritDoc}
     */
    public int hashCode() {
        return destAddress.hashCode();
    }
}