peergroupadv.java

jxme的一些相关程序,主要是手机上程序开发以及手机和计算机通信的一些程序资料,程序编译需要Ant支持

/*
 * 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: PeerGroupAdv.java,v 1.26 2002/06/18 20:46:00 hamada Exp $
 */

package net.jxta.impl.protocol;

import net.jxta.protocol.PeerGroupAdvertisement;
import net.jxta.platform.ModuleClassID;
import net.jxta.platform.ModuleSpecID;
import net.jxta.peergroup.PeerGroupID;
import net.jxta.id.IDFactory;
import net.jxta.document.*;
import java.util.Enumeration;
import java.net.URL;
import java.util.Hashtable;

import java.net.MalformedURLException;
import java.net.UnknownServiceException;

public class PeerGroupAdv extends PeerGroupAdvertisement {
    
    private static final String nameTag = "Name";
    private static final String gidTag = "GID";
    private static final String descTag = "Desc";
    private static final String msidTag = "MSID";
    private static final String svcTag = "Svc";
    private static final String mcidTag = "MCID";
    private static final String paramTag = "Parm";
    
    public static class Instantiator implements AdvertisementFactory.Instantiator {
        
        /**
         * Returns the identifying type of this Advertisement.
         *
         * @return String the type of advertisement
         *
         * @since JXTA 1.0
         **/
        public String getAdvertisementType( ) {
            return PeerGroupAdv.getAdvertisementType();
        }
        
        /**
         * Constructs an instance of <CODE>Advertisement</CODE> matching the type
         * specified by the <CODE>advertisementType</CODE> parameter.
         *
         * @param advertisementType Specifies the mime media type to be associated with the
         * <CODE>StructuredDocument</CODE> to be created.
         * @return The instance of <CODE>Advertisement</CODE> or null if it
         * could not be created.
         *
         * @exception InvocationTargetException error invoking target constructor
         *
         * @since JXTA 1.0
         **/
        public Advertisement newInstance( ) {
            return new PeerGroupAdv();
        }
        
        /**
         * Constructs an instance of <CODE>Advertisement</CODE> matching the type
         * specified by the <CODE>advertisementType</CODE> parameter.
         *
         * @param root Specifies a portion of a StructuredDocument which will be
         * converted into an Advertisement.
         * @return The instance of <CODE>Advertisement</CODE> or null if it
         * could not be created.
         *
         * @exception InvocationTargetException error invoking target constructor
         *
         * @since JXTA 1.0
         **/
        public Advertisement newInstance( net.jxta.document.Element root ) {
            return new PeerGroupAdv( root );
        }
    };
    
    public PeerGroupAdv() {
    }
    
    public PeerGroupAdv( Element root ) {
        initialize( root );
    }
    
    public void initialize(Element root) {
        
        if( !TextElement.class.isInstance( root ) )
            throw new IllegalArgumentException( getClass().getName() + " only supports TextElement" );
        
        TextElement doc = (TextElement) root;
        
        if (! doc.getName().equals( getAdvertisementType() ) )
            
            throw new IllegalArgumentException( "Could not construct : "
            + getClass().getName()
            + "from doc containing a "
            + doc.getName() );
        
        
        // set defaults
        setDescription( null );
        setName( null );
        setModuleSpecID( null );
        setPeerGroupID( null );
        
        Enumeration elements = doc.getChildren();
        
        while ( elements.hasMoreElements() ) {
            TextElement elem = (TextElement) elements.nextElement();
            if( elem.getName().equals(nameTag) ) {
                setName( elem.getTextValue() );
                continue;
            }
            if( elem.getName().equals(descTag) ) {
                setDescription( elem.getTextValue() );
                continue;
            }
            if( elem.getName().equals(gidTag) ) {
                try {
                    URL grID =  IDFactory.jxtaURL( elem.getTextValue() );
                    setPeerGroupID((PeerGroupID) IDFactory.fromURL( grID ));
                } catch ( MalformedURLException badID ) {
                    throw new IllegalArgumentException( "Bad pipe ID in advertisement" );
                } catch ( UnknownServiceException badID ) {
                    throw new IllegalArgumentException( "Unusable ID in advertisement" );
                }
                continue;
            }
            if ( elem.getName().equals(msidTag) ) {
                try {
                    URL specID =  IDFactory.jxtaURL( elem.getTextValue() );
                    setModuleSpecID((ModuleSpecID) IDFactory.fromURL( specID ));
                } catch ( MalformedURLException badID ) {
                    throw new IllegalArgumentException( "Bad pipe ID in advertisement" );
                } catch ( UnknownServiceException badID ) {
                    throw new IllegalArgumentException( "Unusable ID in advertisement" );
                }
                continue;
            }
            if (elem.getName().equals(svcTag)) {
                Enumeration elems = elem.getChildren();
                String classID = null;
                Element param = null;
                while (elems.hasMoreElements()) {
                    TextElement e = (TextElement) elems.nextElement();
                    if ( e.getName().equals(mcidTag) ) {
                        classID = e.getTextValue();
                        continue;
                    }
                    if ( e.getName().equals(paramTag) ) {
                        param = e;
                        continue;
                    }
                }
                if (classID != null && param != null) {
                    // Add this param to the table. putServiceParam()
                    // clones param into a standalone document automatically.
                    // (classID gets cloned too).
                    try {
                        putServiceParam(IDFactory.fromURL(IDFactory.jxtaURL(classID)),
                        param);
                    } catch ( MalformedURLException badID ) {
                        throw new IllegalArgumentException( "Bad pipe ID in advertisement" );
                    } catch ( UnknownServiceException badID ) {
                        throw new IllegalArgumentException( "Unusable ID in advertisement" );
                    }
                }
                continue;
            }
        }
    }
    
    public Document getDocument( MimeMediaType encodeAs ) {
        StructuredTextDocument adv = null;
        
        try {
            adv = (StructuredTextDocument)
            StructuredDocumentFactory.newStructuredDocument(
            encodeAs, getAdvertisementType() );
        }
        catch ( Throwable everything ) {
            return null;
        }
        
        Element e;
        e = adv.createElement(gidTag, getID().toString());
        adv.appendChild(e);
        
        e = adv.createElement(msidTag, getModuleSpecID().toString());
        adv.appendChild(e);
        
        e = adv.createElement(nameTag, getName());
        adv.appendChild(e);
        
        String description = getDescription();
        if( null != description ) {
            e = adv.createElement(descTag, description);
            adv.appendChild(e);
        }
        
        // FIXME: this is inefficient - we force our base class to make
        // a deep clone of the table.
        Hashtable serviceParams = getServiceParams();
        Enumeration classIds = serviceParams.keys();
        while (classIds.hasMoreElements()) {
            ModuleClassID classId = (ModuleClassID) classIds.nextElement();
            
            Element s = adv.createElement(svcTag);
            adv.appendChild(s);
            
            e = adv.createElement(mcidTag, classId.toString());
            s.appendChild(e);
            
            e = (Element) serviceParams.get(classId);
            StructuredDocumentUtils.copyElements(adv, s, e);
            
        }
        return adv;
    }
}