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Updating JPA Entity Objects

transaction: Employee employee = em.jpa/EntityManager/find_Class__Object">find(Employee.class, 1); em.jpa/EntityManager/getTransaction">getTransaction().jpa/EntityTransaction/begin">begin(); employee

Working with JPA Entity Objects

Entity objects are in-memory instances of jpa/entity/types#entity ... the database. Managing an ObjectDB Object Database using JPA requires using entity objects ... is not yet associated with an jpa/EntityManager">EntityManager

JPA Query Expressions (JPQL / Criteria)

> Every query consists of jpa/query/jpql/structure">clauses - SELECT, FROM ... >jpa/query/jpql/from">JPQL / Criteria Variables jpa/query/parameter">JPQL / Criteria Parameters jpa/query/jpql/literal

JPA / JDO Class Enhancer

classes (jpa/entity/types#entity_classes">entity classes, jpa/entity/types#embeddable_classes">embeddable classes and jpa/entity/types#mapped ... required by JPA but not enforced by ObjectDB) to avoid accessing persistent fields of other classes

JPA Persistence Unit

A JPA Persistence Unit is a logical grouping of user defined persistable classes ... unit is optional when using ObjectDB, but required by JPA. jpa/EntityManagerFactory/close">EntityManagerFactory

Defining a JPA Entity Class

To be able to store Point objects in the database using JPA we need to define an entity class. A JPA entity class is a POJO (Plain Old Java Object) class, i.e ... .persistence.Entity; jpa/Entity">@Entity public class Point

JPA 2 Annotations

JPA defines dozens of annotations that can be divided into the following groups: Annotations for JPA aware classes: jpa/annotations" select="Class Modifiers|JPQL Queries"> Annotations for fields in JPA

ObjectDB - Object Database for Java (JPA/JDO)

> ObjectDB is extremely fast and much faster than any other JPA solution. Using ... ">See JPA benchmark results... Reduce development time ... software for developing Java database applications using the Java Persistence API (JPA). It is the first

JPA Tutorials

JPA and the ObjectDB ODBMS (Object Oriented Database Management System). Console JPA Tutorial The Quick Start tutorial demonstrates how to use ObjectDB and JPA in a console application: jpa/start">Quick Start with JPA

Getting Started with JPA

This tutorial demonstrates how to create and run a simple JPA application. The demonstrated application uses JPA to store and retrieve simple Point entity objects ... " style="display:block; margin-left:auto; margin-right:auto">If you already know JPA - the source code