/*******************************************************************************
* Copyright (c) 1998, 2009 Oracle. 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:
* Guy Pelletier (Oracle), February 28, 2007
* - New file introduced for bug 217880.
* 05/16/2008-1.0M8 Guy Pelletier
* - 218084: Implement metadata merging functionality between mapping files
******************************************************************************/
package org.eclipse.persistence.internal.jpa.metadata.changetracking;
import java.lang.annotation.Annotation;
import org.eclipse.persistence.annotations.ChangeTrackingType;
import org.eclipse.persistence.descriptors.ClassDescriptor;
import org.eclipse.persistence.descriptors.changetracking.AttributeChangeTrackingPolicy;
import org.eclipse.persistence.descriptors.changetracking.DeferredChangeDetectionPolicy;
import org.eclipse.persistence.descriptors.changetracking.ObjectChangePolicy;
import org.eclipse.persistence.descriptors.changetracking.ObjectChangeTrackingPolicy;
import org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor;
import org.eclipse.persistence.internal.jpa.metadata.ORMetadata;
import org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAccessibleObject;
/**
* Object to hold onto change tracking metadata.
*
* @author Guy Pelletier
* @since EclipseLink 1.0
*/
public class ChangeTrackingMetadata extends ORMetadata {
private Enum m_type;
/**
* INTERNAL:
*/
public ChangeTrackingMetadata() {
super("<change-tracking>");
}
/**
* INTERNAL:
*/
public ChangeTrackingMetadata(Annotation changeTracking, MetadataAccessibleObject accessibleObject) {
super(changeTracking, accessibleObject);
m_type = (Enum) MetadataHelper.invokeMethod("value", changeTracking);
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public Enum getType() {
return m_type;
}
/**
* INTERNAL:
*/
public void process(MetadataDescriptor descriptor) {
// Set the change tracking flag on the Metadata Descriptor.
descriptor.setHasChangeTracking();
// Process the change tracking metadata.
ClassDescriptor classDescriptor = descriptor.getClassDescriptor();
ObjectChangePolicy policy = null;
if (m_type.name().equals(ChangeTrackingType.ATTRIBUTE.name())) {
policy = new AttributeChangeTrackingPolicy();
} else if (m_type.name().equals(ChangeTrackingType.OBJECT.name())) {
policy = new ObjectChangeTrackingPolicy();
} else if (m_type.name().equals(ChangeTrackingType.DEFERRED.name())) {
policy = new DeferredChangeDetectionPolicy();
} else if (m_type.name().equals(ChangeTrackingType.AUTO.name())) {
// By setting the policy to null, this will unset any global
// settings. EclipseLink will then determine the change tracking
// policy at runtime.
policy = null;
}
classDescriptor.setObjectChangePolicy(policy);
}
/**
* INTERNAL:
* Used for OX mapping.
*/
public void setType(Enum type) {
m_type = type;
}
}