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//$Id: Version.java 11282 2007-03-14 22:05:59Z epbernard $
//EJB3 Specification Copyright 2004-2006 Sun Microsystems, Inc.
package javax.persistence;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.*;
import static java.lang.annotation.RetentionPolicy.*;
/**
* This annotation specifies the version field or property of an entity class that serves as its
* optimistic lock value. The version is used to ensure integrity when performing the merge
* operation and for optimistic concurrency control.
*
* Only a single Version property or field should be used per class; applications that use more
* than one Version property or field will not be portable.
*
* The Version property should be mapped to the primary table for the entity class; applications
* that map the Version property to a table other than the primary table will not be portable.
*
* The following types are supported for version properties: int, Integer, short, Short, long,
* Long, Timestamp.
*
* @author Emmanuel Bernard
*/
@
Target({METHOD, FIELD
}) @
Retention(RUNTIME
)
public @
interface Version
{}