Difference between revisions of "EclipseLink/Examples/JPA/Migration/Hibernate/V3Annotations"

Revision as of 13:23, 15 July 2008

This example walks through the migration from Hibernate(TM) V3 using JPA + native annotations in combination with the native API to EclipseLink JPA.

Entity Annotations

@org.hibernate.annotations.Entity

@org.hibernate.annotations.Entity(
		selectBeforeUpdate = true,
		dynamicInsert = true, dynamicUpdate = true,
		optimisticLock = OptimisticLockType.ALL,
		polymorphism = PolymorphismType.EXPLICIT)

Custom Sequence Generator

In Hibernate a custom generator for sequence values can be defined and used as:

   @Id
   @GeneratedValue(generator = "system-uuid")
   @GenericGenerator(name = "system-uuid", strategy = "mypackage.UUIDGenerator")
   public String getTransactionGuid()

With EclipseLink a custom sequence generator can be implemented and registered for use using the @GeneratedValue. See: How to use Custom Sequencing (ie. UUID) for more details.

Mapping Annotation