| /* |
| * 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 |
| // 03/19/2018-2.7.2 Lukas Jungmann |
| // - 496836: NullPointerException on ObjectChangeSet.mergeObjectChanges |
| package org.eclipse.persistence.internal.sessions; |
| |
| /** |
| * This change Record is used to record the changes for AggregateObjectMapping. |
| */ |
| public class AggregateChangeRecord extends ChangeRecord implements org.eclipse.persistence.sessions.changesets.AggregateChangeRecord { |
| protected org.eclipse.persistence.sessions.changesets.ObjectChangeSet changedObject; |
| protected transient Object oldValue; |
| // assign NULL to oldValue to indicate that it has been set to null. |
| protected static final String NULL = "NULL"; |
| |
| /** |
| * This default constructor. |
| */ |
| public AggregateChangeRecord() { |
| super(); |
| } |
| |
| /** |
| * This constructor returns an ChangeRecord representing an AggregateMapping. |
| */ |
| public AggregateChangeRecord(ObjectChangeSet owner) { |
| this.owner = owner; |
| } |
| |
| /** |
| * ADVANCED: |
| * This method is used to return the ObjectChangeSet representing the changed Aggregate. |
| */ |
| @Override |
| public org.eclipse.persistence.sessions.changesets.ObjectChangeSet getChangedObject() { |
| return changedObject; |
| } |
| |
| /** |
| * INTERNAL: |
| * This method will be used to merge one record into another |
| */ |
| @Override |
| public void mergeRecord(ChangeRecord mergeFromRecord, UnitOfWorkChangeSet mergeToChangeSet, UnitOfWorkChangeSet mergeFromChangeSet) { |
| if (this.changedObject == null) { |
| this.changedObject = ((AggregateChangeRecord)mergeFromRecord).getChangedObject(); |
| if(this.changedObject == null) { |
| return; |
| } else { |
| mergeToChangeSet.addObjectChangeSetForIdentity((ObjectChangeSet)this.changedObject, mergeFromChangeSet.getUOWCloneForObjectChangeSet(this.changedObject)); |
| ((ObjectChangeSet)this.changedObject).updateReferences(mergeToChangeSet, mergeFromChangeSet); |
| return; |
| } |
| } |
| ObjectChangeSet change = (ObjectChangeSet)((AggregateChangeRecord)mergeFromRecord).getChangedObject(); |
| if (change == null) { |
| // bug #496836 - incoming change is setting the aggregate to null |
| this.changedObject = null; |
| } else { |
| ((ObjectChangeSet)this.changedObject).mergeObjectChanges(change, mergeToChangeSet, mergeFromChangeSet); |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| * This method is used to set the changed value or values. |
| */ |
| public void setChangedObject(org.eclipse.persistence.sessions.changesets.ObjectChangeSet newValue) { |
| changedObject = newValue; |
| if(this.oldValue == null) { |
| this.oldValue = newValue; |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| * This method will be used to update the objectsChangeSets references |
| * If this is an aggregate change set then there is no need to update the |
| * reference as the ChangeSet has no identity outside of this record |
| * Check to see if it exists here already to prevent us from creating a little |
| * extra garbage. |
| */ |
| @Override |
| public void updateReferences(UnitOfWorkChangeSet mergeToChangeSet, UnitOfWorkChangeSet mergeFromChangeSet) { |
| Object localChangeSet = mergeToChangeSet.getUOWCloneForObjectChangeSet(this.changedObject); |
| if (localChangeSet == null) { |
| mergeToChangeSet.addObjectChangeSetForIdentity((ObjectChangeSet)this.changedObject, mergeFromChangeSet.getUOWCloneForObjectChangeSet(this.changedObject)); |
| } |
| } |
| |
| /** |
| * ADVANCED: |
| * If the owning UnitOfWork has shouldChangeRecordKeepOldValue set to true, |
| * then return the old value of the attribute represented by this ChangeRecord. |
| */ |
| @Override |
| public Object getOldValue() { |
| if (oldValue == NULL) { |
| return null; |
| } else if (oldValue instanceof ObjectChangeSet) { |
| ObjectChangeSet changeSet = (ObjectChangeSet)oldValue; |
| return changeSet.getOldValue(); |
| } else { |
| return this.oldValue; |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| * Set the old value of the attribute represented by this ChangeRecord. |
| */ |
| public void setOldValue(Object oldValue) { |
| if (oldValue == null) { |
| this.oldValue = NULL; |
| } else { |
| this.oldValue = oldValue; |
| } |
| } |
| } |