About JPA

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Manual
39

Database Connection using JPA

Working with the Java Persistence API (JPA) consists of using the following interfaces: Overview ... for Query instances, which are needed for executing queries on the database. Every JPA implementation ... of ObjectDB classes that implement these interfaces, and because standard JPA interfaces are used
Manual
39

Retrieving JPA Entity Objects

The Java Persistence API (JPA) provides various ways to retrieve objects from the database ... that has already been fetched from the database is available in objects that are detached. JPA 2 introduces methods ... queries. The official query language of JPA is JPQL (Java Persistence Query Language). It enables
Manual
39

Updating JPA Entity Objects

classes are in use. It is usually recommended to use collections rather than arrays when using JPA. Collections are more portable to ORM JPA implementations and provide better automatic change tracking ... have to be modified in one operation. The UPDATE Queries in JPA/JPQL in chapter 4 explains how to use JPA UPDATE queries.
Manual
39

Chapter 4 - JPA Queries (JPQL / Criteria) [2011-04-01]

The JPA Query Language (JPQL) can be considered as an object oriented version of SQL. Users ... well as how to use the JPA Criteria API, which provides an alternative way for building queries in JPA, based on JPQL. The first section describes the API that JPA provides for using dynamic and static
Manual
39

Chapter 4 - JPA Queries (JPQL / Criteria) [2018-09-15]

The JPA Query Language (JPQL) can be considered as an object oriented version of SQL. Users ... well as how to use the JPA Criteria API, which provides an alternative way for building queries in JPA, based on JPQL. The first section describes the API that JPA provides for using dynamic and static
Manual
39

Chapter 4 - JPA Queries (JPQL / Criteria)

The JPA Query Language (JPQL) can be considered as an object oriented version of SQL. Users ... well as how to use the JPA Criteria API, which provides an alternative way for building queries in JPA, based on JPQL. The first section describes the API that JPA provides for using dynamic and static
Tutorial
39

Eclipse/JPA Spring MVC Web Tutorial [2015-06-02]

This is the Eclipse version of the Spring MVC and JPA tutorial. It demonstrates how to create and run a full Java Spring MVC (Model View Controller) web application in Eclipse - using ObjectDB, JPA ... are listed below the form: Persistence is managed by JPA. Every visitor that has signed the guestbook
Tutorial
39

NetBeans/JPA Spring MVC Web Tutorial [2011-02-03]

This is the NetBeans version of the Spring MVC and JPA tutorial. It demonstrates how to create and run a full Java Spring MVC (Model View Controller) web application in NetBeans - using JPA, ObjectDB ... are listed below the form: Persistence is managed by JPA. Every visitor that has signed the guestbook
Manual
38

JPA Primary Key

required. But ObjectDB also supports explicit standard JPA primary keys, including composite primary ... ; : } When an entity has multiple primary key fields, JPA requires defining a special ID class ... values. Obtaining the Primary Key JPA 2 provides a generic method for getting the object ID (primary key
Manual
38

Deleting JPA Entity Objects

object references, if any). Orphan Removal JPA 2 supports an additional and more aggressive remove ... when many entity objects have to be deleted in one operation. The DELETE Queries in JPA/JPQL in chapter 4 explains how to use JPA DELETE queries.