hibernate annotations version initial release date

#Hibernate annotations version initial release date code

Most products supporting each of the two APIs support the Java Persistence API. The Java Persistence API was developed in part to unify the Java Data Objects API and the EJB 2.0 Container Managed Persistence (CMP) API. The Java Persistence API replaces the persistence solution of EJB 2.0 CMP (Container-Managed Persistence). Future versions of the Java Persistence API will be defined in a separate JSR and specification rather than in the EJB JSR/specification. However, developers do not need an EJB container or a Java EE application server to run applications that use this persistence API. The EJB 3.0 specification (itself part of the Java EE 5 platform) included a definition of the Java Persistence API. Thus, many of the features originally presented in third-party persistence frameworks were incorporated into the Java Persistence API, and projects such as Hibernate and TopLink Essentials have become implementations of the Java Persistence API specification.

#Hibernate annotations version initial release date code

This is because entity beans, in previous EJB specifications, called for much complicated code and imposed a heavy resource footprint, and they could be used only on Java EE application servers because of interconnections and dependencies in the source code between beans and DAO objects or persistence frameworks. Prior to the introduction of EJB 3.0 specification, many enterprise Java developers used lightweight persistent objects provided by either persistence frameworks (such as Hibernate) or data access objects (DAO) instead of by using entity beans. Queries resemble SQL queries in syntax but operate against entity objects rather than directly with database tables. The Jakarta Persistence Query Language (JPQL formerly Java Persistence Query Language) makes queries against entities stored in a relational database. This metadata may be specified directly in the entity class file by using annotations or in a separate XML descriptor file distributed with the application.Īn example entity class with ORM metadata declared using annotations (import statements and setters/getters are omitted for simplicity).įurther information: Detailed information is available at Wikibook's Java Persistence/Querying article Entities typically have relationships with other entities, and these relationships are expressed through object/relational mapping (ORM) metadata. Instances of such an entity correspond to individual rows in the table. Entities Ī persistence entity is a lightweight Java class with its state typically persisted to a table in a relational database.

The JPA 3.1 specification, the latest version, was released in the spring of 2022 as part of Jakarta EE 10. The JPA 2.2 specification was released in the summer of 2017. The JPA 2.1 specification was released 22 April 2013 (the Java EE 7 platform requires JPA 2.1 ). The JPA 2.0 specification was released 10 December 2009 (the Java EE 6 platform requires JPA 2.0 ). The final release date of the JPA 1.0 specification was as part of Java Community Process JSR 220. The reference implementation for JPA is EclipseLink.

The Jakarta Persistence Query Language (JPQL formerly Java Persistence Query Language).

The API itself, defined in the jakarta.persistence package ( javax.persistence for Jakarta EE 8 and below).

Persistence in this context covers three areas: Jakarta Persistence ( JPA formerly Java Persistence API) is a Jakarta EE application programming interface specification that describes the management of relational data in enterprise Java applications.

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