53 lines
2.6 KiB
Plaintext
53 lines
2.6 KiB
Plaintext
= 7.0 Migration Guide
|
|
:toc:
|
|
:toclevels: 4
|
|
:docsBase: https://docs.jboss.org/hibernate/orm
|
|
:versionDocBase: {docsBase}/6.4
|
|
:userGuideBase: {versionDocBase}/userguide/html_single/Hibernate_User_Guide.html
|
|
:javadocsBase: {versionDocBase}/javadocs
|
|
|
|
|
|
This guide discusses migration to Hibernate ORM version 7.0. For migration from
|
|
earlier versions, see any other pertinent migration guides as well.
|
|
|
|
[[jpa-32]]
|
|
== JPA 3.2
|
|
|
|
7.0 migrates to JPA 3.2 which is fairly disruptive, mainly around:
|
|
|
|
* type parameters
|
|
** Affects much of the Criteria API - especially roots, joins, paths
|
|
** Affects much of the Graph API -
|
|
*** org.hibernate.graph.Graph.addAttributeNode(java.lang.String) defines a return while
|
|
1jakarta.persistence.Graph.addAttributeNode(java.lang.String)` does not.
|
|
* new JPA features colliding with previous Hibernate extension features
|
|
** `Nulls` (JPA) v. `NullPrecedence` (Hibernate), including JPA's new `Order#getNullPrecedence()` returning `Nulls`
|
|
colliding with Hibernate's `SqmSortSpecification#getNullPrecedence` returning `NullPrecedence`. Hibernate's form
|
|
was renamed to `SqmSortSpecification#getHibernateNullPrecedence` to avoid the collision.
|
|
** `SchemaManager` is now also a JPA contract exposed as `EntityManagerFactory#getSchemaManager` which leads to type issues for
|
|
Hibernate's `SessionFactory#getSchemaManager`. Hibernate's `SchemaManager` now extends the new JPA `SchemaManager`.
|
|
But that is a bytecode incompatibility.
|
|
** JPA has added support in its Graph API for things Hibernate has supported for some time. Some of those are collisions
|
|
requiring changes to the Hibernate API.
|
|
|
|
|
|
[[cleanup]]
|
|
== Some Cleanup
|
|
|
|
* Removed `SqmQualifiedJoin`. All joins are qualified.
|
|
|
|
|
|
[[todo]]
|
|
== Todos
|
|
|
|
NOTE:: Look for `// todo (jpa 3.2)`
|
|
|
|
* Deprecate `SqmQualifiedJoin` in 6.x
|
|
* {@linkplain SqmCrossJoin} and its offspring are largely de-typed to account
|
|
for {@linkplain SqmCrossJoin} having only one type argument for the right-hand
|
|
side. To properly handle the type parameters in the hierarchy we need to change this to
|
|
accept type parameter for the left-handle side as well - breaking change.
|
|
* The changes in `jakarta.persistence.EntityManager#createNativeQuery(java.lang.String, java.lang.Class<?>)` are really unfortunate.
|
|
Previously that signature was `(java.lang.String, java.lang.Class)` and our override of that was able to be
|
|
`<R> NativeQuery<R> createNativeQuery(String sqlString, Class<R> resultClass)`. JPA adding that wildcard means our
|
|
override is no longer valid. I had to change that to `` |