| /* |
| * 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: |
| // Oracle - initial API and implementation from Oracle TopLink |
| package org.eclipse.persistence.internal.sessions; |
| |
| /** |
| * <p> |
| * <b>Purpose</b>: To record the changes for an attribute that references a single Object |
| */ |
| public class ObjectReferenceChangeRecord extends ChangeRecord implements org.eclipse.persistence.sessions.changesets.ObjectReferenceChangeRecord { |
| |
| /** This is the object change set that the attribute points to. */ |
| protected ObjectChangeSet newValue; |
| |
| /** A reference to the old value must also be stored. This is only required for the commit and must never be serialized. */ |
| protected transient Object oldValue; |
| |
| /** |
| * INTERNAL: |
| * This default constructor. |
| */ |
| public ObjectReferenceChangeRecord() { |
| super(); |
| } |
| |
| /** |
| * INTERNAL: |
| * This Constructor is used to create an ObjectReferenceChangeRecord With an owner |
| */ |
| public ObjectReferenceChangeRecord(ObjectChangeSet owner) { |
| this.owner = owner; |
| } |
| |
| /** |
| * ADVANCED: |
| * Returns the new reference for this object |
| */ |
| @Override |
| public org.eclipse.persistence.sessions.changesets.ObjectChangeSet getNewValue() { |
| return newValue; |
| } |
| |
| /** |
| * INTERNAL: |
| * This method will be used to merge one record into another |
| */ |
| @Override |
| public void mergeRecord(ChangeRecord mergeFromRecord, UnitOfWorkChangeSet mergeToChangeSet, UnitOfWorkChangeSet mergeFromChangeSet) { |
| ObjectChangeSet localChangeSet = mergeToChangeSet.findOrIntegrateObjectChangeSet((ObjectChangeSet)((ObjectReferenceChangeRecord)mergeFromRecord).getNewValue(), mergeFromChangeSet); |
| this.newValue = localChangeSet; |
| } |
| |
| /** |
| * This method sets the value of the change to be made. |
| * @param newValue ObjectChangeSet |
| */ |
| public void setNewValue(org.eclipse.persistence.sessions.changesets.ObjectChangeSet newValue) { |
| this.newValue = (ObjectChangeSet)newValue; |
| } |
| |
| /** |
| * This method sets the value of the change to be made. |
| */ |
| public void setNewValue(ObjectChangeSet newValue) { |
| this.newValue = newValue; |
| } |
| |
| /** |
| * Return the old value of the object reference. |
| * This is used during the commit for private-owned references. |
| */ |
| @Override |
| public Object getOldValue() { |
| return oldValue; |
| } |
| |
| /** |
| * Set the old value of the object reference. |
| * This is used during the commit for private-owned references. |
| */ |
| public void setOldValue(Object oldValue) { |
| this.oldValue = oldValue; |
| } |
| |
| /** |
| * INTERNAL: |
| * This method will be used to update the objectsChangeSets references |
| */ |
| @Override |
| public void updateReferences(UnitOfWorkChangeSet mergeToChangeSet, UnitOfWorkChangeSet mergeFromChangeSet) { |
| this.setNewValue(mergeToChangeSet.findOrIntegrateObjectChangeSet((ObjectChangeSet)this.getNewValue(), mergeFromChangeSet)); |
| } |
| } |