92 lines
4.2 KiB
Plaintext
92 lines
4.2 KiB
Plaintext
= Hibernate 7.0.0.Beta1
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Steve Ebersole
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:toc:
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:toclevels: 2
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:awestruct-tags: ["Hibernate ORM", "Releases"]
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:awestruct-layout: blog-post
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:family: 7.0
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:docs-url: https://docs.jboss.org/hibernate/orm/{family}
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:javadocs-url: {docs-url}/javadocs
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:migration-guide-url: {docs-url}/migration-guide/migration-guide.html
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:intro-guide-url: {docs-url}/introduction/html_single/Hibernate_Introduction.html
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:user-guide-url: {docs-url}/userguide/html_single/Hibernate_User_Guide.html
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:ql-guide-url: {docs-url}/querylanguage/html_single/Hibernate_Query_Language.html
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The Hibernate ORM 7.0 Beta1 release has just been published. Here are some highlights...
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[[jpa-32]]
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== Jakarta Persistence 3.2
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7.0 migrates to Jakarta Persistence 3.2 which can be fairly disruptive. See the link:{migration-guide-url}#jpa-32[Migration Guide] for details.
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See https://in.relation.to/2024/04/01/jakarta-persistence-3/[this blog post] for a summary of the changes in 3.2
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- https://ci.hibernate.org/view/ORM/job/hibernate-orm-tck-3.2/job/wip%252F7.0/24/[TCK Results] with Java 17
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- https://ci.hibernate.org/view/ORM/job/hibernate-orm-tck-3.2/job/wip%252F7.0/25/[TCK Results] with Java 21
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[[java-17]]
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== Java 17
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Version 3.2 of Jakarta Persistence requires Java 17. Hibernate 7.0 therefore baselines on Java 17 whereas previous versions baseline on Java 11.
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[[model-validations]]
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== Domain Model Validations
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7.0 does much more validation of an application's domain model and especially its mapping details, e.g.
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* illegal combinations such as `@Basic` and `@ManyToOne` on the same attribute
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* misplaced annotations such as an annotated getter method with FIELD access
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* stricter following of JavaBean conventions
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See the link:{migration-guide-url}#annotation-validation[Migration Guide] for details.
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[[mapping-xml]]
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== mapping.xsd
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Hibernate 7.0 provides a new XSD that represents an "extension" of the Jakarta Persistence orm.xsd weaving in Hibernate-specific mapping features. The namespace for this extended mapping is `http://www.hibernate.org/xsd/orm/mapping`
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For applications using Hibernate's legacy `hbm.xml` format, we provide a tool to help with the transformation.
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See the link:{migration-guide-url}#hbm-transform[Migration Guide] for details.
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[[hibernate-models]]
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== Hibernate Models
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7.0 migrates from https://github.com/hibernate/hibernate-commons-annotations/[Hibernate Commons Annotations] (HCANN) to the new https://github.com/hibernate/hibernate-models[Hibernate Models] project for low-level processing of an application domain model, reading annotations and weaving in XML mapping documents.
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See the link:{migration-guide-url}#hibernate-models[Migration Guide] for details.
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[[json-and-xml-functions]]
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== JSON and XML functions
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Support for most of the JSON and XML functions that the SQL standard specifies was added to HQL/Criteria.
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The implementations retain the SQL standard semantics and will throw an error if emulation on a database is impossible.
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New functions include:
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* construction functions like `json_array()`, `json_object()`, `xmlelement()` and `xmlforest()`
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* query functions like `json_value()`, `json_query()` and `xmlquery()`
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* aggregation functions like `json_agg()`, `json_object_agg()` and `xmlagg()`
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* manipulation functions like `json_set()`, `json_mergepatch()`
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* any many more
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NOTE: The functions are incubating/tech-preview and to use them in HQL,
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it is necessary to enable the `hibernate.query.hql.json_functions_enabled` and `hibernate.query.hql.xml_functions_enabled` configuration settings.
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[[set-returning-functions]]
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== Set-returning functions
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A set-returning function is a new type of function that can return rows and is exclusive to the `from` clause.
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The concept is known in many different database SQL dialects and is sometimes referred to as table valued function or table function.
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Custom set-returning functions can be registered via a `FunctionContributor` and Hibernate ORM
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also comes with out-of-the-box support for the set-returning functions `unnest()`, which allows to turn an array into rows,
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and `generate_series()`, which can be used to create a series of values as rows.
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[[cleanup]]
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== Clean-up
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A lot of deprecated contracts and behavior has been removed. See the link:{migration-guide-url}#cleanup[Migration Guide] for details. |