Hibernate (framework): Difference between revisions

Revision as of 23:56, 20 January 2021

Revision as of 12:28, 24 March 2021

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| operating system = [[Cross-platform]] ([[JVM]])

| platform = [[Java Virtual Machine]]

| genre = [[Object-relationalObject–relational mapping]]

| license = [[GNU Lesser General Public License]]

| website = {{url|http://hibernate.org}}

}}

'''Hibernate ORM''' (or simply '''Hibernate''') is an [[object-relationalobject–relational mapping]] tool for the [[Java (programming language)|Java]] programming language. It provides a [[Software framework|framework]] for mapping an [[Object-oriented programming|object-oriented]] ___domain model to a [[relational database]]. Hibernate handles [[object-relationalobject–relational impedance mismatch]] problems by replacing direct, [[Persistence (computer science)|persistent]] database accesses with high-level object handling functions.

Hibernate is [[free software]] that is distributed under the [[GNU Lesser General Public License]] 2.1.

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'''Definition:'''

Objects in an [[Object-oriented programming|object-oriented]] application follow [[object-oriented programming|OOP]] principles, while objects in the back-end follow [[database normalization]] principles, resulting in different representation requirements. This problem is called "[[object-relationalobject–relational impedance mismatch]]". Mapping is a way of resolving the object-relationalobject–relational impedance mismatch problem.

Mapping informs the ORM tool of what Java class object to store in which database table.

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==Software components==

The Hibernate software includes the following components:<ref>{{cite web|title=Hibernate: Relational Persistence for Java and .NET|url=http://www.hibernate.org/|publisher=JBoss Community}}</ref>

* Hibernate ORM (known as Hibernate Core before release 4.1<ref>{{cite web|title=Hibernate ORM 4.1.0 Release|url=http://in.relation.to/Bloggers/HibernateORM410Release|publisher=JBoss Community}}</ref>) – the base software for an object-relationalobject–relational mapping solution for Java environments<ref>{{cite web|title=HIBERNATE - Relational Persistence for Idiomatic Java|url=http://docs.jboss.org/hibernate/orm/4.1/manual/en-US/html/|publisher=JBoss Community}}</ref>

* Hibernate Annotations (merged into Hibernate Core/ORM since version 3.6<ref>{{cite web|title=No more hibernate-annotations module|url=http://in.relation.to/Bloggers/NoMoreHibernateannotationsModule|publisher=JBoss Community}}</ref>) – metadata that governs the transformation of data between the object-oriented model and the relational database model according to the JSR 317 [[Java Persistence API]] (JPA 2)<ref>{{cite web|title=Hibernate Annotations|url=http://docs.jboss.org/hibernate/annotations/3.5/reference/en/html_single/|publisher=JBoss Community}}</ref>

* Hibernate EntityManager (merged into Hibernate Core/ORM since version 5.2<ref>{{cite web|title=hibernate-entitymanager merged into hibernate-core|url=https://github.com/hibernate/hibernate-orm/wiki/Migration-Guide---5.2#hibernate-entitymanager-merged-into-hibernate-core|publisher=JBoss Community}}</ref>)– together with Hibernate Annotations, a wrapper that implements a JSR 317 [[Java Persistence API]] (JPA 2) persistence solution<ref>{{cite web|title=Hibernate EntityManager|url=http://docs.jboss.org/hibernate/entitymanager/3.6/reference/en/html_single/|publisher=JBoss Community}}</ref>

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* Hibernate Validator – the [[reference implementation]] of JSR 303 [[Bean Validation]]<ref>{{cite web|title=Hibernate Validator|url=http://www.hibernate.org/validator/|publisher=JBoss Community}}</ref>

* Hibernate Metamodel Generator – an annotation processor that creates JSR 317 [[Java Persistence API]] (JPA 2) static metamodel classes using the JSR 269 [[Metadata facility for Java|Pluggable Annotation Processing API]]<ref>{{cite web|title=Hibernate Metamodel Generator|url=http://www.hibernate.org/subprojects/jpamodelgen.html|publisher=JBoss Community}}</ref>

* [[NHibernate]] – an object-relationalobject–relational mapping solution for the [[.NET Framework]]<ref>{{cite web|title=NHibernate|url=http://nhforge.org/|publisher=NHibernate Forge|access-date=2011-04-26|archive-url=https://archive.is/20120712170138/http://nhforge.org/|archive-date=2012-07-12|url-status=dead}}</ref>

==See also==

{{Portal|Free and open-source software|Computer programming}}

* [[List of JBoss software]]

* [[List of object-relationalobject–relational mapping software]]

* [[NHibernate]]

* [[Serialization]]