/*
* 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.CBID;
import net.jxta.impl.id.UUID.IDBytes;
import net.jxta.impl.id.UUID.UUID;
import net.jxta.impl.id.UUID.UUIDFactory;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.ProviderException;
import java.util.logging.Logger;
/**
* An implementation of the {@link net.jxta.peer.PeerID} ID Type.
*/
public class PeerID extends net.jxta.impl.id.UUID.PeerID {
/**
* Logger
*/
private static final transient Logger LOG = Logger.getLogger(PeerID.class.getName());
/**
* Used only internally.
*/
protected PeerID() {
super();
}
/**
* See {@link net.jxta.id.IDFactory.Instantiator#newPeerID(net.jxta.peergroup.PeerGroupID)}.
*
* @param groupID the PeerGroupID
*/
public PeerID(PeerGroupID groupID) {
this(groupID.getUUID(), UUIDFactory.newUUID());
}
/**
* Intializes contents from provided ID.
*
* @param id the ID data
*/
protected PeerID(IDBytes id) {
super(id);
}
/**
* See {@link net.jxta.id.IDFactory.Instantiator#newPeerID(net.jxta.peergroup.PeerGroupID,byte[])}.
*
* @param groupID the PeerGroupID
* @param seed the seed
*/
public PeerID(PeerGroupID groupID, byte[] seed) {
this(groupID.getUUID(), seedToHashUUID(seed));
}
private static UUID seedToHashUUID(byte[] seed) {
MessageDigest digester = null;
try {
digester = MessageDigest.getInstance("SHA-1");
} catch (NoSuchAlgorithmException caught) {
digester = null;
}
if (digester == null) {
throw new ProviderException("SHA1 digest algorithm not found");
}
byte[] digest = digester.digest(seed);
// we keep only the 128 most significant bits
byte[] buf16 = new byte[16];
System.arraycopy(digest, 0, buf16, 0, 16);
return new UUID(buf16);
}
/**
* Creates a PeerID. A PeerGroupID is provided
*
* @param groupUUID the group to which this will belong.
* @param peerUUID id of this peer
*/
protected PeerID(UUID groupUUID, UUID peerUUID) {
super(groupUUID, peerUUID);
}
/**
* {@inheritDoc}
*/
@Override
public String getIDFormat() {
return IDFormat.INSTANTIATOR.getSupportedIDFormat();
}
/**
* {@inheritDoc}
*/
@Override
public net.jxta.id.ID getPeerGroupID() {
net.jxta.id.ID superGroupID = super.getPeerGroupID();
if(superGroupID instanceof net.jxta.impl.id.UUID.PeerGroupID) {
return new PeerGroupID(((net.jxta.impl.id.UUID.PeerGroupID) superGroupID).getUUID());
} else {
// It's already been transformed into a well-known id.
return superGroupID;
}
}
/**
* Returns the UUID associated with this PeerID.
*
* @return The UUID associated with this PeerID.
*/
public UUID getUUID() {
return new UUID(id.bytesIntoLong(PeerID.idOffset), id.bytesIntoLong(PeerID.idOffset + 8));
}
}