peer.java

用jxse开发的一个p2p通讯软件 有聊天 文件共享 视频3大功能

/*
*  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 THE APACHE SOFTWARE FOUNDATION 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: Peer.java,v 1.2 2006/05/17 19:26:07 nano Exp $
*/

package net.jxta.myjxta.util;

import net.jxta.myjxta.dialog.Dialog;
import net.jxta.protocol.PipeAdvertisement;

/**
 *
 * @version $Id: Peer.java,v 1.2 2006/05/17 19:26:07 nano Exp $
 *
 * @author james todd [gonzo at jxta dot org]
 */

public class Peer {

    private PipeAdvertisement pipeAdv = null;
    private String name = null;

    public Peer(PipeAdvertisement pipeAdv) {
        this(pipeAdv, null);
    }

//    public Peer(String name) {
//        this(null, name);
//    }
    
    public Peer(PipeAdvertisement pipeAdv, String name) {
        this.pipeAdv = pipeAdv;
        this.name = name;

        if (this.pipeAdv != null &&
            this.name == null) {
            String s = this.pipeAdv.getName();

            if (s != null) {
                this.name = s.substring(s.indexOf(Dialog.IMFREE_DELIMITER) + 1);
            }
        }
    }

    public final String getName() {
        return this.name;
    }

    public String getId() {
        final String DELIMITER = ".";

        return (this.pipeAdv != null ?
            this.pipeAdv.getID().toString() + DELIMITER : "") + this.name;
    }

    public PipeAdvertisement getPipeAdvertisement() {
        return this.pipeAdv;
    }
    
    public boolean equals(Object o) {
        return (o instanceof Peer &&
            getId().equals(((Peer)o).getId()));
    }

    /**
     * hash method must be over-ridden if equals() is over-ridden.
     * The Object api says that if two objects evaulate as equal using
     * the equals() method, then their hash codes must be equal.
     * 
     * This hash method ensures that the hash codes reflect the
     * information evaluated by equals.
     *
     * @return hash code for this GroupNode.
     */
    public int hashCode() {
        return getId().hashCode();
    }
}