org.hibernate.id.UUIDHexGenerator Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC 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 Middleware LLC.
*
* 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.hibernate.Hibernate;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.type.Type;
import org.hibernate.util.PropertiesHelper;
/**
* 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 String sep = "";
protected String format(int intval) {
String formatted = Integer.toHexString(intval);
StringBuffer buf = new StringBuffer("00000000");
buf.replace( 8-formatted.length(), 8, formatted );
return buf.toString();
}
protected String format(short shortval) {
String formatted = Integer.toHexString(shortval);
StringBuffer buf = new StringBuffer("0000");
buf.replace( 4-formatted.length(), 4, formatted );
return buf.toString();
}
public Serializable generate(SessionImplementor session, Object obj) {
return new StringBuffer(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();
}
public void configure(Type type, Properties params, Dialect d) {
sep = PropertiesHelper.getString("separator", params, "");
}
public static void main( String[] args ) throws Exception {
Properties props = new Properties();
props.setProperty("separator", "/");
IdentifierGenerator gen = new UUIDHexGenerator();
( (Configurable) gen ).configure(Hibernate.STRING, props, null);
IdentifierGenerator gen2 = new UUIDHexGenerator();
( (Configurable) gen2 ).configure(Hibernate.STRING, props, null);
for ( int i=0; i<10; i++) {
String id = (String) gen.generate(null, null);
System.out.println(id);
String id2 = (String) gen2.generate(null, null);
System.out.println(id2);
}
}
}