| /* |
| * Copyright (c) 1998, 2020 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 v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0, |
| * or the Eclipse Distribution License v. 1.0 which is available at |
| * http://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause |
| */ |
| |
| // 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 |
| // 04/27/2010-2.1 Guy Pelletier |
| // - 309856: MappedSuperclasses from XML are not being initialized properly |
| // 08/17/2010-2.2 Guy Pelletier |
| // - 252280: inconsistency in change-tracking xml |
| // 03/24/2011-2.3 Guy Pelletier |
| // - 337323: Multi-tenant with shared schema support (part 1) |
| package org.eclipse.persistence.internal.jpa.metadata.changetracking; |
| |
| 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.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.MetadataAccessor; |
| import org.eclipse.persistence.internal.jpa.metadata.accessors.objects.MetadataAnnotation; |
| |
| /** |
| * Object to hold onto change tracking metadata. |
| * |
| * Key notes: |
| * - any metadata mapped from XML to this class must be compared in the |
| * equals method. |
| * - when loading from annotations, the constructor accepts the metadata |
| * accessor this metadata was loaded from. Used it to look up any |
| * 'companion' annotation needed for processing. |
| * - methods should be preserved in alphabetical order. |
| * |
| * @author Guy Pelletier |
| * @since EclipseLink 1.0 |
| */ |
| public class ChangeTrackingMetadata extends ORMetadata { |
| private String m_type; |
| |
| /** |
| * INTERNAL: |
| * Used for XML loading. |
| */ |
| public ChangeTrackingMetadata() { |
| super("<change-tracking>"); |
| } |
| |
| /** |
| * INTERNAL: |
| * Used for annotation loading. |
| */ |
| public ChangeTrackingMetadata(MetadataAnnotation changeTracking, MetadataAccessor accessor) { |
| super(changeTracking, accessor); |
| |
| m_type = changeTracking.getAttributeString("value"); |
| } |
| |
| /** |
| * INTERNAL: |
| */ |
| @Override |
| public boolean equals(Object objectToCompare) { |
| if (objectToCompare instanceof ChangeTrackingMetadata) { |
| ChangeTrackingMetadata changeTracking = (ChangeTrackingMetadata) objectToCompare; |
| return valuesMatch(m_type, changeTracking.getType()); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public int hashCode() { |
| return m_type != null ? m_type.hashCode() : 0; |
| } |
| |
| /** |
| * INTERNAL: |
| * Used for OX mapping. |
| */ |
| public String 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(); |
| |
| if (m_type == null || m_type.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. |
| classDescriptor.setObjectChangePolicy(null); |
| } else if (m_type.equals(ChangeTrackingType.ATTRIBUTE.name())) { |
| classDescriptor.setObjectChangePolicy(new AttributeChangeTrackingPolicy()); |
| } else if (m_type.equals(ChangeTrackingType.OBJECT.name())) { |
| classDescriptor.setObjectChangePolicy(new ObjectChangeTrackingPolicy()); |
| } else if (m_type.equals(ChangeTrackingType.DEFERRED.name())) { |
| classDescriptor.setObjectChangePolicy(new DeferredChangeDetectionPolicy()); |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| * Used for OX mapping. |
| */ |
| public void setType(String type) { |
| m_type = type; |
| } |
| } |