org.hibernate.id.UUIDHexGenerator.java Source code

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Here is the source code for org.hibernate.id.UUIDHexGenerator.java

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/*
 * 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;

/**
 * <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();
    }
}