Module org.eclipse.persistence.core

Package org.eclipse.persistence.internal.descriptors.changetracking

Class AggregateAttributeChangeListener

java.lang.Object

org.eclipse.persistence.internal.descriptors.changetracking.ObjectChangeListener

org.eclipse.persistence.internal.descriptors.changetracking.AttributeChangeListener

org.eclipse.persistence.internal.descriptors.changetracking.AggregateAttributeChangeListener

All Implemented Interfaces:

PropertyChangeListener, Serializable, EventListener

public class AggregateAttributeChangeListener
extends AttributeChangeListener

Purpose: Define a listener for attribute change tracking.

Description: Listener is notified on a PropertyChangeEvent from the object it belongs to.

Responsibilities: Set the flag to true and build ObjectChangeSet that includes the ChangeRecords for the changed attributes.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected String	parentAttributeName
protected AttributeChangeListener	parentListener

Fields inherited from class org.eclipse.persistence.internal.descriptors.changetracking.AttributeChangeListener

descriptor, objectChangeSet, owner, uow

Fields inherited from class org.eclipse.persistence.internal.descriptors.changetracking.ObjectChangeListener

hasChanges, ignoreDepth, ignoreEvents

Constructor Summary

Constructors

Constructor	Description
AggregateAttributeChangeListener(ClassDescriptor descriptor, UnitOfWorkImpl uow, AttributeChangeListener parentListener, String parentAttribute, Object owner)	Create a AttributeChangeListener with a descriptor and unit of work

Method Summary

Modifier and Type	Method	Description
void	internalPropertyChange(PropertyChangeEvent evt)	This method creates the object change set if necessary.
void	setParentListener(AttributeChangeListener listener)	Used to control the parent listener;

Methods inherited from class org.eclipse.persistence.internal.descriptors.changetracking.AttributeChangeListener

clearChanges, getDescriptor, getObjectChangeSet, getUnitOfWork, propertyChange, setDescriptor, setObjectChangeSet, setUnitOfWork, toString

Methods inherited from class org.eclipse.persistence.internal.descriptors.changetracking.ObjectChangeListener

hasChanges, ignoreEvents, processEvents

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

parentListener

protected AttributeChangeListener parentListener

parentAttributeName

protected String parentAttributeName

Constructor Details

AggregateAttributeChangeListener

public AggregateAttributeChangeListener(ClassDescriptor descriptor,
 UnitOfWorkImpl uow,
 AttributeChangeListener parentListener,
 String parentAttribute,
 Object owner)

Create a AttributeChangeListener with a descriptor and unit of work

Method Details

internalPropertyChange

public void internalPropertyChange(PropertyChangeEvent evt)

This method creates the object change set if necessary. It also creates/updates the change record based on the new value. Object should check the if newValue and oldValue are identical. If they are identical, do not create PropertyChangeEvent and call this method.

Overrides:

internalPropertyChange in class AttributeChangeListener

setParentListener

public void setParentListener(AttributeChangeListener listener)

Used to control the parent listener;