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Tutorial
8

Step 2: Entity Class and Persistence Unit

of the persistence.xml file with the following new content: version="1.0" encoding="UTF-8"?> version="2.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001
Tutorial
8

Step 2: Entity Class and Persistence Unit

, use copy and paste to copy the following content to the persistence.xml file: version="1.0" encoding="UTF-8"?> version="2.0" xmlns="http://java.sun.com/xml/ns/persistence
Tutorial
8

Step 1: Install BIRT and ObjectDB Driver

the installation and restarting the IDE. Note: See this issue regarding matching the driver version to the ObjectDB server version when using client-server mode. The next step is creating a BIRT Report project.
Result
8

Upgrade from ObjectDB 1.0

The following pages should be read by ObjectDB 1.0 users: If you need help in upgrading your application from version 1.0 to version 2.0 - please feel free to contact ObjectDB Support.
JPA Doc
6

javax.persistence.metamodel.EntityType

the attribute that corresponds to the version attribute declared by the entity or mapped superclass. Return the attribute that corresponds to the version attribute declared by the entity or mapped superclass. Parameters: type - the type of the represented declared version attribute Returns: declared
JPA Doc
6

javax.persistence.metamodel.IdentifiableType

the attribute that corresponds to the version attribute declared by the entity or mapped superclass. Return the attribute that corresponds to the version attribute declared by the entity or mapped superclass. Parameters: type - the type of the represented declared version attribute Returns: declared
JPA Doc
6

javax.persistence.metamodel.MappedSuperclassType

to the version attribute declared by the entity or mapped superclass. Return the attribute that corresponds to the version attribute declared by the entity or mapped superclass. Parameters: type - the type of the represented declared version attribute Returns: declared version attribute Throws
JPA Doc
6

javax.persistence.EntityManager

has a version attribute, the persistence provider must perform optimistic version checks ... mode other than NONE is specified OptimisticLockException - if the optimistic version check fails ... has a version attribute, the persistence provider must perform optimistic version checks when obtaining
FAQ
5

Can I use ObjectDB with languages other than Java?

ObjectDB can be used by Java Virtual Machine (JVM) languages, such as Java, Groovy and Scala. It can also be used with other languages, such as Phyton, Ruby and PHP, but currently only with their JVM implementations (e.g. Jython for Phyton, JRuby for Ruby and Quercus for PHP). A version of ObjectDB
Manual
5

Chapter 4 - JPA Queries (JPQL / Criteria)

The JPA Query Language (JPQL) can be considered as an object oriented version of SQL. Users familiar with SQL should find JPQL very easy to learn and use. This chapter explains how to use JPQL as well as how to use the JPA Criteria API, which provides an alternative way for building queries in JPA