resolverserviceinterface.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
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 * 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: ResolverServiceInterface.java,v 1.9 2006/04/10 17:31:58 bondolo Exp $
 */

package net.jxta.impl.resolver;

import net.jxta.service.Service;
import net.jxta.resolver.ResolverService;
import net.jxta.resolver.QueryHandler;
import net.jxta.resolver.SrdiHandler;
import net.jxta.protocol.ResolverQueryMsg;
import net.jxta.protocol.ResolverResponseMsg;
import net.jxta.protocol.ResolverSrdiMsg;
import net.jxta.document.Advertisement;
import net.jxta.peergroup.PeerGroup;
import net.jxta.id.ID;

/**
 *  Provides a controlled interface to the Resolver Service.
 **/
public class ResolverServiceInterface implements ResolverService {
    
    private final ResolverServiceImpl impl;
    
    /**
     * Only authorized constructor
     */
    ResolverServiceInterface(ResolverServiceImpl theRealThing) {
        impl = theRealThing;
    }
    
    /**
     *  {@inheritDoc}
     *
     *  <p/>Since THIS is already such an object, it returns itself.
     * FIXME: it is kind of absurd to have this method part of the
     * interface but we do not want to define two levels of Service interface
     * just for that.
     */
    public Service getInterface() {
        return this;
    }
    
    /**
     *  {@inheritDoc}
     *
     * <p/>FIXME: This is meaningless for the interface object;
     * it is there only to satisfy the requirements of the
     * interface that we implement. Ultimately, the API should define
     * two levels of interfaces: one for the real service implementation
     * and one for the interface object. Right now it feels a bit heavy
     * to so that since the only different between the two would be
     * init() and may-be getName().
     */
    public void init(PeerGroup g, ID assignedID, Advertisement impl) {}
    
    /**
     *  {@inheritDoc}
     *
     *  <p/>Does nothing in the interface object.
     */
    public int startApp(String[] arg) {
        return 0;
    }
    
    /**
     *  {@inheritDoc}
     *
     *  <p/>Does nothing in the interface object.
     */
    public void stopApp() {}
    
    /**
     *  {@inheritDoc}
     */
    public Advertisement getImplAdvertisement() {
        return impl.getImplAdvertisement();
    }
    
    /**
     *  {@inheritDoc}
     */
    public QueryHandler registerHandler(String name, QueryHandler handler) {
        return impl.registerHandler(name, handler);
    }
    
    /**
     *  {@inheritDoc}
     */
    public QueryHandler unregisterHandler(String name) {
        return impl.unregisterHandler(name);
    }
    
    /**
     *  {@inheritDoc}
     */
    public SrdiHandler registerSrdiHandler(String name, SrdiHandler handler) {
        return impl.registerSrdiHandler(name, handler);
    }
    
    /**
     *  {@inheritDoc}
     */
    public SrdiHandler unregisterSrdiHandler(String name) {
        return impl.unregisterSrdiHandler(name);
    }
    
    /**
     *  {@inheritDoc}
     */
    public void  sendQuery(String rdvPeer, ResolverQueryMsg query) {
        impl.sendQuery(rdvPeer, query);
    }
    
    /**
     *  {@inheritDoc}
     */
    public void  sendResponse(String destPeer, ResolverResponseMsg response) {
        impl.sendResponse(destPeer, response);
    }
    
    /**
     *  {@inheritDoc}
     */
    public void sendSrdi(String destPeer, ResolverSrdiMsg srdi) {
        impl.sendSrdi(destPeer, srdi);
    }
}