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8

JPA Annotations for Relationships

annotation enables configuring cascade and fetch policy, using the following enum types: Additional
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JPA 2 Annotations

JPA defines dozens of annotations that can be divided into the following groups: Annotations for JPA aware classes: Annotations for fields in JPA persistable classes: Annotations for additional JPA configuration: Annotations for JPA lifecycle event callbacks: Java EE container annotations: Many
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Updating JPA Entity Objects

, ObjectDB can be configured to detect array changes using snapshots as well as when enhanced entity
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JPA Annotations for Classes

JPA defines three types of persistable classes which are set by the following annotations: Chapter 2 of the ObjectDB manual explains these annotations in detail. Entity and mapped super classes can be further configured by annotations that specify cache preferences and lifecycle event listener
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javax.persistence.Persistence

: persistenceUnitName - the name of the persistence unit Returns: the factory that creates EntityManagers configured ... of these properties override any values that may have been configured elsewhere. Returns: the factory that creates EntityManagers configured according to the specified persistence unit. Since: JPA 1.0
3

createEntityManagerFactory(persistenceUnitName, properties)

of these properties override any values that may have been configured elsewhere. Returns: the factory that creates EntityManagers configured according to the specified persistence unit. Since: JPA 1.0
0

[ODB1] Chapter 5 - JDO Connections

connection only when the server configuration allows anonymous access to the database. If not specified
0

javax.jdo.PersistenceManagerFactory

. PersistenceManagerFactory instances may be configured and serialized for later use. They may be stored via JNDI and looked up and used later. Any properties configured will be saved and restored ... be configured. If the ConnectionFactory property is set (non-null) then all other Connection properties
0

getPersistenceManagerFactory()

Static Method javax.jdo.JDOHelper PersistenceManagerFactory getPersistenceManagerFactory() Get the anonymous PersistenceManagerFactory configured via the standard configuration file resource "META-INF/jdoconfig.xml", using the current thread's context class loader to locate the configuration file
0

getPersistenceManagerFactory(overrides, name, resourceLoader, pmfLoader)

a PersistenceManagerFactory configured based on the properties stored in the resource at name, or, if not found, returns ... PersistenceManagerFactory is not configurable (the setXXX methods will throw an exception). This method

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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