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getMetamodel()

Method javax.persistence.EntityManagerFactory Metamodel getMetamodel() Return an instance of Metamodel interface for access to the metamodel of the persistence unit. Returns: Metamodel instance Throws: IllegalStateException - if the entity manager factory has been closed Since: JPA 2.0
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getCache()

Method javax.persistence.EntityManagerFactory Cache getCache() Access the cache that is associated with the entity manager factory (the "second level cache"). Returns: instance of the Cache interface Throws: IllegalStateException - if the entity manager factory has been closed Since: JPA 2.0
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PersistenceContext.name

Annotation Element javax.persistence.PersistenceContext String name (Optional) The name by which the entity manager is to be accessed in the environment referencing context; not needed when dependency injection is used. Default value: "" Since: JPA 1.0
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AccessType.PROPERTY

Enum Constant javax.persistence.AccessType PROPERTY Property-based access is used. Since: JPA 2.0
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isLoadedWithReference(entity, attributeName)

to obtain a reference to the attribute value. (This access is safe because providers which might trigger
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AccessType.FIELD

Enum Constant javax.persistence.AccessType FIELD Field-based access is used. Since: JPA 2.0
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javax.jdo.Query

, but might be specified via setResultClass. A hidden field may be accessed using the 'this' qualifier
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jdoPreStore()

which this call is made allows access to the PersistenceManager and other persistent JDO instances. Since: JDO 2.0
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jdoPostLoad()

Method javax.jdo.listener.LoadCallback void jdoPostLoad() Called after the values are loaded from the data store into this instance. This method is not modified by the enhancer. Derived fields should be initialized in this method. The context in which this call is made does not allow access to other persistent JDO instances. Since: JDO 2.0
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javax.jdo.listener.ClearLifecycleListener

the enhancer, so access to fields is not mediated. Parameters: event - the clear event. Since: JDO 2.0

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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