/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.id;

import java.io.Serializable;
import java.util.Properties;

import org.hibernate.MappingException;
import org.hibernate.engine.spi.SharedSessionContractImplementor;
import org.hibernate.internal.CoreLogging;
import org.hibernate.internal.CoreMessageLogger;
import org.hibernate.internal.util.config.ConfigurationHelper;
import org.hibernate.service.ServiceRegistry;
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
/** * <b>uuid</b><br> * <br> * A <tt>UUIDGenerator</tt> 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. * <p/> * Mapping parameters supported: separator. * * @author Gavin King */
public class UUIDHexGenerator extends AbstractUUIDGenerator implements Configurable { private static final CoreMessageLogger LOG = CoreLogging.messageLogger( UUIDHexGenerator.class ); private static boolean WARNED; private String sep = ""; public UUIDHexGenerator() { if ( !WARNED ) { WARNED = true; LOG.usingUuidHexGenerator( this.getClass().getName(), UUIDGenerator.class.getName() ); } } @Override public void configure(Type type, Properties params, ServiceRegistry serviceRegistry) throws MappingException { sep = ConfigurationHelper.getString( "separator", params, "" ); } @Override public Serializable generate(SharedSessionContractImplementor session, Object obj) { return format( getIP() ) + sep + format( getJVM() ) + sep + format( getHiTime() ) + sep + format( getLoTime() ) + sep + format( getCount() ); } 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(); } }