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Hibernate's core ORM functionality

There is a newer version: 7.0.0.Alpha1

/*
 * 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 .
 */
package org.hibernate.annotations;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.FIELD;
import static java.lang.annotation.ElementType.METHOD;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

/**
 * Optional annotation in conjunction with {@link javax.persistence.Version} and timestamp version properties
 * indicating the source of the timestamp value.
 *
 * @author Hardy Ferentschik
 */
@Target({ METHOD, FIELD })
@Retention(RUNTIME)
public @interface Source {
	/**
	 * How is the timestamp generated?  Default is a JVM generated value.
	 */
	SourceType value() default SourceType.VM;
}