About JPA

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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)

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
38

NetBeans/JPA Java EE 6 Tutorial

This is the NetBeans version of the Java EE JPA tutorial. It demonstrates how to create and run ... and JPA. The demo web application manages a basic guestbook page. Every visitor can sign the guestbook ... : Persistence is managed by JPA. Every visitor that has signed the guestbook is represented by a Guest entity
Tutorial
38

NetBeans/JPA Web Application Tutorial

This is the NetBeans version of the JPA Web App tutorial. It demonstrates how to create and run ... modifications are needed for Tomcat 7.0), ObjectDB and JPA. The demo web application manages a basic ... that have already signed are listed below the form: Persistence is managed by JPA. Every visitor
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.
Tutorial
38

Getting Started with JPA - Maven Project

The Getting Started with JPA tutorial provides step by step instructions on how to build a simple JPA database driven application in Eclipse or NetBeans. Building a new application step by step ... a Maven project: Getting Started with JPA - Maven Project (3KB) If Maven is installed - extract the zip
Tutorial
38

Getting Started with JPA and NetBeans

This is the NetBeans version of the Quick Start with JPA tutorial. It demonstrates how to create and run a simple JPA application in NetBeans. The demonstrated application uses JPA to store and retrieve simple Point entity objects, where each Point has two persistent fields - x and y