peerviewevent.java

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

/*
 * $Id: PeerViewEvent.java,v 1.5 2004/05/18 19:22:10 bondolo Exp $
 *
 * 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: PeerViewEvent.java,v 1.5 2004/05/18 19:22:10 bondolo Exp $
 *
 */

package net.jxta.impl.rendezvous.rpv;


import java.util.EventObject;


/**
 *  Container for PeerViewEvent events.
 **/
public class PeerViewEvent extends EventObject {

    public static final int        ADD = 10;
    public static final int     REMOVE = 11;
    public static final int       FAIL = 12;

    private static final String EVENTNAMES[] = {
        "ADD", "REMOVE", "FAIL"
    };

    private int type;
    private PeerViewElement  element;
  
    /**
     *  Creates a new event
     *
     *  @param source The peer view which is generating the event.
     *  @param type the event type
     *  @param element the peer associated with the event
     **/
    public PeerViewEvent(Object source, int type, PeerViewElement element) {
        super(source);
        this.type = type;
        this.element = element;
    }

    /**
     *  {@inheritDoc}
     **/
    public String toString() {
        String eventType;
        
        if ((type >= ADD) && (type <= FAIL)) {
            eventType = EVENTNAMES[type - ADD];
        } else {
            eventType = "UNKNOWN (" + type + ")";
        }
        
        return super.toString() + " : " + eventType + " for " + element;
    }
    
    /**
     *  Returns the event type
     *
     *  @return int type
     **/
    public int getType() {

        return type;
    }
   
    /**
     *  Returns the PeerViewElement
     *
     *  @return the peer view element associated with the event
     **/
    public PeerViewElement getPeerViewElement() {

        return element;
    }
}