/******************************************************************************* | |
* Copyright (c) 1998, 2013 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 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: | |
* 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 | |
*/ | |
public org.eclipse.persistence.sessions.changesets.ObjectChangeSet getNewValue() { | |
return newValue; | |
} | |
/** | |
* INTERNAL: | |
* This method will be used to merge one record into another | |
*/ | |
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. | |
*/ | |
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 | |
*/ | |
public void updateReferences(UnitOfWorkChangeSet mergeToChangeSet, UnitOfWorkChangeSet mergeFromChangeSet) { | |
this.setNewValue(mergeToChangeSet.findOrIntegrateObjectChangeSet((ObjectChangeSet)this.getNewValue(), mergeFromChangeSet)); | |
} | |
} |