org.hibernate.id.UUIDHexGenerator Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.id;
import java.io.Serializable;
import java.util.Properties;
import org.jboss.logging.Logger;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.spi.SessionImplementor;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.internal.util.config.ConfigurationHelper;
import org.hibernate.type.Type;
/**
* uuid
*
* A UUIDGenerator that returns a string of length 32,
* This string will consist of only hex digits. Optionally,
* the string may be generated with separators between each
* component of the UUID.
*
* Mapping parameters supported: separator.
*
* @author Gavin King
*/
public class UUIDHexGenerator extends AbstractUUIDGenerator implements Configurable {
private static final CoreMessageLogger LOG = Logger.getMessageLogger(CoreMessageLogger.class, UUIDHexGenerator.class.getName());
private static boolean warned = false;
private String sep = "";
public UUIDHexGenerator() {
if ( ! warned ) {
warned = true;
LOG.usingUuidHexGenerator(this.getClass().getName(), UUIDGenerator.class.getName());
}
}
/**
* {@inheritDoc}
*/
public void configure(Type type, Properties params, Dialect d) {
sep = ConfigurationHelper.getString( "separator", params, "" );
}
/**
* {@inheritDoc}
*/
public Serializable generate(SessionImplementor session, Object obj) {
return new StringBuilder( 36 )
.append( format( getIP() ) ).append( sep )
.append( format( getJVM() ) ).append( sep )
.append( format( getHiTime() ) ).append( sep )
.append( format( getLoTime() ) ).append( sep )
.append( format( getCount() ) )
.toString();
}
protected String format(int intValue) {
String formatted = Integer.toHexString( intValue );
StringBuilder buf = new StringBuilder( "00000000" );
buf.replace( 8 - formatted.length(), 8, formatted );
return buf.toString();
}
protected String format(short shortValue) {
String formatted = Integer.toHexString( shortValue );
StringBuilder buf = new StringBuilder( "0000" );
buf.replace( 4 - formatted.length(), 4, formatted );
return buf.toString();
}
}