idformat.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

/************************************************************************
 *
 * $Id: IDFormat.java,v 1.2 2002/06/18 20:45:59 hamada 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.
 *********************************************************************************/

package net.jxta.impl.id.UUID;

import java.net.URL;
import net.jxta.id.IDFactory;

import java.security.NoSuchAlgorithmException;

/**
 *  The 'uuid' format is a general purpose JXTA ID Format. It implements all of
 *  the six standard ID types. It was originally created for the Jave 2 SE
 *  reference implementation. The 'uuid' format uses randomly generated UUIDs
 *  as the mechanism for generating canonical values for the ids it provides.
 **/
public class IDFormat {
    
    final static int IdByteArraySize = 64;
    
    final static int uuidSize = 16;
    
    final static int flagsSize = 1;
    
    final static int flagsIdTypeOffset = IDFormat.flagsSize - 1;
    final static byte flagCodatID = 0x01;
    final static byte flagPeerGroupID = 0x02;
    final static byte flagPeerID = 0x03;
    final static byte flagPipeID = 0x04;
    final static byte flagModuleClassID = 0x05;
    final static byte flagModuleSpecID = 0x06;
    
    final static int flagsOffset = IDFormat.IdByteArraySize - IDFormat.flagsSize;
    
    /**
     *  Our local version of the world Peer Group ID. We need this for cases
     *  where we have to make ids which are in the world peer group. We only
     *  use this ID for those cases and never return this ID.
     **/
    final static PeerGroupID worldPeerGroupID = new PeerGroupID(
    new UUID( 0x5961626164616261L, 0x4A78746150325033L ) ); //YabadabaJXTAP2P!
    
    /**
     *  Our local version of the net Peer Group ID. We need this for cases
     *  where we have to make ids which are in the net peer group. We only
     *  use this ID for those cases and never return this ID.
     **/
    final static PeerGroupID defaultNetPeerGroupID = new PeerGroupID(
    new UUID( 0x5961626164616261L, 0x4E50472050325033L ) ); //YabadabaNPG P2P!
    
    /**
     *  This table maps our local private versions of the well known ids to the
     *  globally known version.
     **/
    final static Object[] [] wellKnownIDs = {
        { net.jxta.peergroup.PeerGroupID.worldPeerGroupID,
          worldPeerGroupID },
          
        { net.jxta.peergroup.PeerGroupID.defaultNetPeerGroupID,
          defaultNetPeerGroupID }
    };
    
    /**
     * The instantiator for this ID Format which is used by the IDFactory.
     *
     * @since JXTA 1.0
     **/    
    public static final Instantiator INSTANTIATOR = new Instantiator();
    
    /**
     *  Private Constructor. This class cannot be instantiated.
     **/
    private IDFormat() {
    }
    
    /**
     *  Translate from well known ID to our locally encoded versions.
     *
     *  @since JXTA 1.0
     *
     *  @param input    the id to be translated.
     *  @return the translated ID or the input ID if no translation was needed.
     **/
    static net.jxta.id.ID translateFromWellKnown( net.jxta.id.ID input ) {
        for( int eachWellKnown = 0; eachWellKnown < wellKnownIDs.length; eachWellKnown++ ) {
            net.jxta.id.ID aWellKnown = (net.jxta.id.ID) wellKnownIDs[eachWellKnown][0];
            if( aWellKnown.equals( input ) )
                return (net.jxta.id.ID) wellKnownIDs[eachWellKnown][1];
        }
        
        return input;
    }
    
    /**
     *  Translate from locally encoded versions to the well known versions.
     *
     *  @since JXTA 1.0
     *
     *  @param input    the id to be translated.
     *  @return the translated ID or the input ID if no translation was needed.
     **/
    static net.jxta.id.ID translateToWellKnown( net.jxta.id.ID input ) {
        for( int eachWellKnown = 0; eachWellKnown < wellKnownIDs.length; eachWellKnown++ ) {
            net.jxta.id.ID aWellKnown = (net.jxta.id.ID) wellKnownIDs[eachWellKnown][1];
            if( aWellKnown.equals( input ) )
                return (net.jxta.id.ID) wellKnownIDs[eachWellKnown][0];
        }
        
        return input;
    }
    
    /**
     *  Public member which returns a URI (URL in Java nomenclature) of the ID.
     *
     *  @since JXTA 1.0
     *
     *  @param	uniqueValue the unique portion of the ID
     *  @return	URL Object containing the URI
     **/
    static URL getURL( String uniqueValue ) {
        URL result = null;
        
        // Encode the unique value so that the resulting URN is valid.
        String encoded = sun.net.www.protocol.urn.Handler.encodeURN( uniqueValue );
        
        try {
            result = IDFactory.jxtaURL( net.jxta.id.ID.URIEncodingName,
            "",
            net.jxta.id.ID.URNNamespace + ":" + encoded );
        }
        catch ( java.net.MalformedURLException ignored ) {
            System.out.println( "URL Handler for '" +
            net.jxta.id.ID.URIEncodingName +
            "' not found. Check your classpath for sun.net.www.protocol." +
            net.jxta.id.ID.URIEncodingName + ".Handler" );
        }
        
        return result;
    }
}