instantiator.java

JXTA&#8482 is a set of open, generalized peer-to-peer (P2P) protocols that allow any networked devi

/*
 * Copyright (c) 2001-2007 Sun Microsystems, Inc.  All rights reserved.
 *  
 *  The Sun Project JXTA(TM) Software License
 *  
 *  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 Sun Microsystems, Inc. for JXTA(TM) technology." 
 *     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.
 *  
 *  JXTA is a registered trademark of Sun Microsystems, Inc. in the United 
 *  States and other countries.
 *  
 *  Please see the license information page at :
 *  <http://www.jxta.org/project/www/license.html> for instructions on use of 
 *  the license in source files.
 *  
 *  ====================================================================
 *  
 *  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.io.InputStream;
import java.net.URI;
import java.net.URL;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.UnknownServiceException;
import java.net.URISyntaxException;

import net.jxta.id.IDFactory;


/**
 *  The instantiator for the UUID ID Format.
 *
 *  <p/>For "seed" variant constructors, the first 16 bytes of the seed are used
 *  literally as the UUID value. The value is masked to make it a valid version 4
 *  IETF varient UUID.
 */
public class Instantiator implements IDFactory.URIInstantiator {
    
    /**
     *  Our ID Format
     */
    final static String UUIDEncoded = "uuid";
    
    /**
     * {@inheritDoc}
     */
    public String getSupportedIDFormat() {
        return UUIDEncoded;
    }
    
    /**
     * {@inheritDoc}
     */
    public net.jxta.id.ID fromURL(URL source) throws MalformedURLException, UnknownServiceException {
        
        // check the protocol
        if (!net.jxta.id.ID.URIEncodingName.equalsIgnoreCase(source.getProtocol())) {
            throw new UnknownServiceException("URI protocol type was not as expected.");
        }
        
        String  encoded = source.getFile();
        
        int colonAt = encoded.indexOf(':');
        
        // There's a colon right?
        if (-1 == colonAt) {
            throw new UnknownServiceException("URN namespace was missing.");
        }
        
        // check the namespace
        if (!net.jxta.id.ID.URNNamespace.equalsIgnoreCase(encoded.substring(0, colonAt))) {
            throw new UnknownServiceException("URN namespace was not as expected.");
        }
        
        // skip the namespace portion and the colon
        encoded = encoded.substring(colonAt + 1);
        
        int dashAt = encoded.indexOf('-');
        
        // there's a dash, right?
        if (-1 == dashAt) {
            throw new UnknownServiceException("URN Encodingtype was missing.");
        }
        
        if (!encoded.substring(0, dashAt).equals(getSupportedIDFormat())) {
            throw new UnknownServiceException("JXTA ID Format was not as expected.");
        }
        
        // skip the dash
        encoded = encoded.substring(dashAt + 1);
        
        // check that the length is even
        if (0 != (encoded.length() % 2)) {
            throw new MalformedURLException("URN contains an odd number of chars");
        }
        
        // check that the length is long enough
        if (encoded.length() < 2) {
            throw new MalformedURLException("URN does not contain enough chars");
        }
        
        // check that id is short enough
        if (IDFormat.IdByteArraySize < (encoded.length() % 2)) {
            throw new MalformedURLException("URN contains too many chars");
        }
        
        net.jxta.id.ID result = null;
        IDBytes id = new IDBytes();
        
        try {
            // do the primary portion.
            for (int eachByte = 0; eachByte < ((encoded.length() / 2) - IDFormat.flagsSize); eachByte++) {
                int index = eachByte * 2;
                String twoChars = encoded.substring(index, index + 2);

                id.bytes[eachByte] = (byte) Integer.parseInt(twoChars, 16);
            }
            
            // do the flags
            for (int eachByte = IDFormat.flagsOffset; eachByte < IDFormat.IdByteArraySize; eachByte++) {
                int index = encoded.length() - (IDFormat.IdByteArraySize - eachByte) * 2;
                String twoChars = encoded.substring(index, index + 2);

                id.bytes[eachByte] = (byte) Integer.parseInt(twoChars, 16);
            }
        } catch (NumberFormatException caught) {
            throw new MalformedURLException("Invalid Character in JXTA URI");
        }
        
        switch (id.bytes[IDFormat.flagsOffset + IDFormat.flagsIdTypeOffset]) {
        case IDFormat.flagCodatID:
            result = new CodatID(id);
            break;

        case IDFormat.flagPeerGroupID:
            result = new PeerGroupID(id);
            result = (PeerGroupID) IDFormat.translateToWellKnown(result);
            break;

        case IDFormat.flagPeerID:
            result = new PeerID(id);
            break;

        case IDFormat.flagPipeID:
            result = new PipeID(id);
            break;

        case IDFormat.flagModuleClassID:
            result = new ModuleClassID(id);
            break;

        case IDFormat.flagModuleSpecID:
            result = new ModuleSpecID(id);
            break;

        default:
            throw new MalformedURLException("JXTA ID Type not recognized");
        }
        
        return result;
    }
    
    /**
     * {@inheritDoc}
     */
    public net.jxta.codat.CodatID newCodatID(net.jxta.peergroup.PeerGroupID groupID) {
        PeerGroupID  peerGroupID = (PeerGroupID) IDFormat.translateFromWellKnown(groupID);
        
        return new CodatID(peerGroupID);
    }
    
    /**
     * {@inheritDoc}
     */
    public net.jxta.codat.CodatID newCodatID(net.jxta.peergroup.PeerGroupID groupID, byte[] seed) {
        PeerGroupID  peerGroupID = (PeerGroupID) IDFormat.translateFromWellKnown(groupID);
        
        return new CodatID(peerGroupID, seed);
    }
    
    /**
     * {@inheritDoc}
     */
    public net.jxta.codat.CodatID newCodatID(net.jxta.peergroup.PeerGroupID groupID, InputStream in) throws IOException {