| /* |
| * 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; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.persistence.descriptors.ClassDescriptor; |
| import org.eclipse.persistence.mappings.AggregateCollectionMapping; |
| |
| /** |
| * This change record records the changes for AggregateCollectionMapping. |
| */ |
| public class AggregateCollectionChangeRecord extends CollectionChangeRecord implements org.eclipse.persistence.sessions.changesets.AggregateCollectionChangeRecord { |
| protected List<ObjectChangeSet> changedValues; |
| |
| /** |
| * This default constructor. |
| */ |
| public AggregateCollectionChangeRecord() { |
| super(); |
| } |
| |
| /** |
| * This constructor returns an ChangeRecord representing an AggregateMapping. |
| * @param owner org.eclipse.persistence.internal.sessions.ObjectChangeSet represents the Object Change Set that uses this record |
| */ |
| public AggregateCollectionChangeRecord(ObjectChangeSet owner) { |
| super(); |
| this.owner = owner; |
| } |
| |
| /** |
| * ADVANCED: |
| * Return the values representing the changed AggregateCollection. |
| */ |
| @Override |
| public List<ObjectChangeSet> getChangedValues() { |
| if (changedValues == null) { |
| changedValues = new ArrayList(2); |
| } |
| return changedValues; |
| } |
| |
| /** |
| * Returns descriptor corresponding to the object. |
| */ |
| @Override |
| ClassDescriptor getReferenceDescriptor(Object object, AbstractSession session) { |
| return ((AggregateCollectionMapping)this.mapping).getReferenceDescriptor(object.getClass(), session); |
| } |
| |
| /** |
| * INTERNAL: |
| * This method will be used to merge one record into another |
| */ |
| @Override |
| public void mergeRecord(ChangeRecord mergeFromRecord, UnitOfWorkChangeSet mergeToChangeSet, UnitOfWorkChangeSet mergeFromChangeSet) { |
| this.setChangedValues(((AggregateCollectionChangeRecord)mergeFromRecord).getChangedValues()); |
| |
| //an aggregate collection changerecord contains a copy of the entire collection, not just the changes |
| //so there in no need to merge it, just replace it. |
| for (ObjectChangeSet change : getChangedValues()) { |
| change.updateReferences(mergeToChangeSet, mergeFromChangeSet); |
| } |
| } |
| |
| /** |
| * INTERNAL: |
| * Set the changed values. |
| */ |
| public void setChangedValues(List<ObjectChangeSet> newValues) { |
| this.changedValues = newValues; |
| } |
| |
| /** |
| * 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) { |
| for (ObjectChangeSet mergedChangeSet : getChangedValues()) { |
| Object localObject = mergeToChangeSet.getUOWCloneForObjectChangeSet(mergedChangeSet); |
| if (localObject == null) { |
| mergeToChangeSet.addObjectChangeSetForIdentity(mergedChangeSet, mergeFromChangeSet.getUOWCloneForObjectChangeSet(mergedChangeSet)); |
| } |
| } |
| } |
| } |