Fast Object Database for Java - with JPA/JDO support

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4

postDelete(event)

) Invoked whenever a persistent instance is deleted, for example during javax.jdo.PersistenceManager.deletePersistent. This method is called after the instance transitions to persistent-deleted. Access to field values is not permitted. Parameters: event - the delete event. Since: JDO 2.0
4

javax.jdo.annotations.Join

Delete action to be applied to any ForeignKey on this join. Delete action to be applied to any ForeignKey on this join. Returns: the delete action Default value: javax.jdo.annotations.ForeignKeyAction
4

javax.jdo.annotations.ForeignKey

Default value: "" Since: JDO 2.1 ForeignKeyAction deleteAction The delete action of this foreign key. The delete action of this foreign key. Returns: the delete action of this foreign key Default
4

deletePersistent(pc)

Method javax.jdo.PersistenceManager void deletePersistent( Object pc ) Delete the persistent ... , the closure of the instance is not deleted from the data store. This method has no effect if the instance is already deleted in the current transaction. This method throws JDOUserException
3

executeUpdate()

Method javax.persistence.Query int executeUpdate() Execute an update or delete statement. Returns: the number of entities updated or deleted Throws: IllegalStateException - if called for a Java Persistence query language SELECT statement or for a criteria query TransactionRequiredException
3

Value.deleteAction

Annotation Element javax.jdo.annotations.Value ForeignKeyAction deleteAction Delete action to apply to any foreign key for the value. Returns: delete action to apply to any foreign key for the value Default value: javax.jdo.annotations.ForeignKeyAction.UNSPECIFIED Since: JDO 2.1
3

Key.deleteAction

Annotation Element javax.jdo.annotations.Key ForeignKeyAction deleteAction Delete action to apply to the foreign key for the key. Returns: delete action to apply to the foreign key for the key Default value: javax.jdo.annotations.ForeignKeyAction.UNSPECIFIED Since: JDO 2.1
3

Join.deleteAction

Annotation Element javax.jdo.annotations.Join ForeignKeyAction deleteAction Delete action to be applied to any ForeignKey on this join. Returns: the delete action Default value: javax.jdo.annotations.ForeignKeyAction.UNSPECIFIED Since: JDO 2.1
3

javax.persistence.EntityManager

., for update or delete. Create an instance of Query for executing a native SQL statement, e.g., for update or delete. Parameters: sqlString - a native SQL query string Returns: the new query instance
3

deletePersistentAll(parameters)

Method javax.jdo.Query long deletePersistentAll( Map parameters ) Deletes all the instances of the candidate class that pass the filter. Parameters: parameters - for the query Returns: the number of instances of the candidate class that were deleted Since: JDO 2.0 See Also: deletePersistentAll()

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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