/******************************************************************************* | |
* 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; | |
import org.eclipse.persistence.sessions.DatabaseRecord; | |
import org.eclipse.persistence.sessions.Record; | |
/** | |
* <p> | |
* <b>Purpose</b>: To record the changes for attributes that can be represented as Transformation Mapping | |
* <p> | |
*/ | |
public class TransformationMappingChangeRecord extends ChangeRecord implements org.eclipse.persistence.sessions.changesets.TransformationMappingChangeRecord { | |
protected AbstractRecord rowCollection; | |
protected transient Object oldValue; | |
/** | |
* This default constructor. | |
*/ | |
public TransformationMappingChangeRecord() { | |
super(); | |
} | |
/** | |
* This is the basic constructor for this change Record. | |
* This change record stores the fields that have changed as that is our current method of comparing | |
* changes. | |
*/ | |
public TransformationMappingChangeRecord(ObjectChangeSet owner) { | |
this.owner = owner; | |
} | |
/** | |
* ADVANCED: | |
* This method is used to access the changes of the fields in a transformation mapping. | |
*/ | |
public Record getRecord() { | |
if (rowCollection == null) { | |
this.rowCollection = new DatabaseRecord(); | |
} | |
return rowCollection; | |
} | |
/** | |
* INTERNAL: | |
* This method will be used to merge one record into another | |
*/ | |
public void mergeRecord(ChangeRecord mergeFromRecord, UnitOfWorkChangeSet mergeToChangeSet, UnitOfWorkChangeSet mergeFromChangeSet) { | |
this.rowCollection = (AbstractRecord)((TransformationMappingChangeRecord)mergeFromRecord).getRecord(); | |
} | |
/** | |
* This method is used to add a changed value to the changeRecord. The changes in a transformation | |
* mapping are recorded on the database field level | |
* @param Record Record the values from the transformation mapping | |
*/ | |
public void setRow(AbstractRecord record) { | |
this.rowCollection = record; | |
} | |
/** | |
* INTERNAL: | |
* This method will be used to update the objectsChangeSets references | |
* There is nothing to do for this mapping type as there are no object | |
* references | |
*/ | |
public void updateReferences(UnitOfWorkChangeSet mergeToChangeSet, UnitOfWorkChangeSet mergeFromChangeSet) { | |
} | |
/** | |
* ADVANCED: | |
* Return the old value of the attribute represented by this ChangeRecord. | |
*/ | |
public Object getOldValue() { | |
return this.oldValue; | |
} | |
/** | |
* INTERNAL: | |
* Set the old value of the attribute represented by this ChangeRecord. | |
*/ | |
public void setOldValue(Object oldValue) { | |
this.oldValue = oldValue; | |
} | |
} |