/*******************************************************************************
 * Copyright (c) 1998, 2013 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the 
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0 
 * which accompanies this distribution. 
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at 
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 *     Oracle - initial API and implementation from Oracle TopLink
 ******************************************************************************/  
package org.eclipse.persistence.annotations;

import java.lang.annotation.Retention;
import java.lang.annotation.Target;

import static java.lang.annotation.ElementType.TYPE;
import static java.lang.annotation.RetentionPolicy.RUNTIME;

import static org.eclipse.persistence.annotations.ChangeTrackingType.AUTO;

/** 
 * The ChangeTracking annotation is used to specify the 
 * org.eclipse.persistence.descriptors.changetracking.ObjectChangePolicy 
 * which computes changes sets for EclipseLink's UnitOfWork commit process. 
 * An ObjectChangePolicy is stored on an Entity's descriptor.
 * 
 * A ChangeTracking annotation may be specified on an Entity, 
 * MappedSuperclass or Embeddable.
 * 
 * @see org.eclipse.persistence.annotations.ChangeTrackingType
 * @author Guy Pelletier
 * @since Oracle TopLink 11.1.1.0.0 
 */ 
@Target({TYPE})
@Retention(RUNTIME)
public @interface ChangeTracking {
    /**
     * (Optional) The type of change tracking to use.
     */ 
    ChangeTrackingType value() default AUTO;
}