Module eclipselink

Package org.eclipse.persistence.annotations

Enum Class ChangeTrackingType

java.lang.Object

java.lang.Enum<ChangeTrackingType>

org.eclipse.persistence.annotations.ChangeTrackingType

All Implemented Interfaces:

Serializable, Comparable<ChangeTrackingType>, Constable

public enum ChangeTrackingType
extends Enum<ChangeTrackingType>

An enum that is used within the ChangeTracking annotation.

See Also:

• ChangeTracking

Author:

Guy Pelletier

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
ATTRIBUTE	Allows change tracking at the attribute level of an object.
AUTO	Will not set any change tracking policy, and the change tracking will be determined at runtime.
DEFERRED	Defers all change detection to the UnitOfWork's change detection process.
OBJECT	Allows an object to calculate for itself whether it has changed.

Method Summary

Modifier and Type	Method	Description
static ChangeTrackingType	valueOf(String name)	Returns the enum constant of this class with the specified name.
static ChangeTrackingType[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

ATTRIBUTE

public static final ChangeTrackingType ATTRIBUTE

Allows change tracking at the attribute level of an object. Objects with changed attributes will be processed in the commit process to include any changes in the results of the commit.

Unchanged objects will be ignored.

OBJECT

public static final ChangeTrackingType OBJECT

Allows an object to calculate for itself whether it has changed. Changed objects will be processed in the commit process to include any changes in the results of the commit.

Unchanged objects will be ignored.

DEFERRED

public static final ChangeTrackingType DEFERRED

Defers all change detection to the UnitOfWork's change detection process. Essentially, the UnitOfWorkImpl.calculateChanges(java.util.Map, org.eclipse.persistence.internal.sessions.UnitOfWorkChangeSet, boolean, boolean) method will run for all objects in a UnitOfWork.

This is the default ObjectChangePolicy

AUTO

public static final ChangeTrackingType AUTO

Will not set any change tracking policy, and the change tracking will be determined at runtime.

Method Details

values

public static ChangeTrackingType[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static ChangeTrackingType valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null