/*
* 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.cm.srdi.inmemory;
import net.jxta.id.ID;
import net.jxta.logging.Logging;
import net.jxta.peer.PeerID;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* An immutable key used in the PeerIdIndex
*
* Indexing anything using directly the {@link PeerID} object is VERY costly
* due to its design requiring a recalculation of the hash on every
* call to hashCode() - see {@link ID#getUniqueValue()}
*
* The hashcode is pre-calculated and stored favouring performance over memory
*/
public class PeerIdKey {
private final static transient Logger LOG = Logger.getLogger( PeerIdKey.class.getName( ) );
private final String strPeerIdKey;
private int hashCode;
public PeerIdKey( String peerIdKey ) {
this.strPeerIdKey = peerIdKey;
}
public PeerIdKey( PeerID peerID ) {
this( peerID.toURI( ).toString( ) );
}
public PeerID getPeerID( ) throws IllegalArgumentException {
try {
return PeerID.create( new URI( this.strPeerIdKey ) );
} catch ( URISyntaxException e ) {
String err = "Unable to rebuild the Peer ID from URI '" + strPeerIdKey + "'";
if ( Logging.SHOW_ERROR && LOG.isLoggable( Level.SEVERE ) ) {
LOG.log( Level.SEVERE, err, e );
}
throw new IllegalArgumentException( err );
}
}
@Override
public boolean equals( Object aThat ) {
Boolean result = IndexKeyUtil.quickEquals( this, aThat );
if ( result == null ) {
PeerIdKey that = (PeerIdKey) aThat;
result = IndexKeyUtil.equalsFor( this.getSignificantFields( ), that.getSignificantFields( ) );
}
return result;
}
@Override
public int hashCode( ) {
if ( hashCode == 0 ) {
hashCode = IndexKeyUtil.hashCodeFor( this.getSignificantFields( ) );
}
return hashCode;
}
private Object[] getSignificantFields( ) {
return new Object[] { this.strPeerIdKey };
}
/**
* An unique String representation of the Peer ID URI
*/
@Override
public String toString( ) {
return this.strPeerIdKey;
}
}