Fast Object Database for Java - with JPA/JDO support

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javax.persistence.Query

Chapter 4 of the ObjectDB/JPA manual. int executeUpdate() Execute an update or delete statement. Execute an update or delete statement. Returns: the number of entities updated or deleted Throws ... Persistence query language UPDATE or DELETE statement QueryTimeoutException - if the query execution
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javax.jdo.listener.DeleteCallback

to notify instances of delete events. Since: JDO 2.0 void jdoPreDelete() Called before the instance is deleted. Called before the instance is deleted. This method is called before the state transition to persistent-deleted or persistent-new-deleted. Access to field values within this call are valid
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javax.jdo.annotations.Persistent

are dependent and so deleted when this object is deleted. Whether related object(s) of this member are dependent and so deleted when this object is deleted. Returns: whether the related object(s
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Element.dependent

Annotation Element javax.jdo.annotations.Element String dependent Whether the element is dependent on the owner, and will be deleted when the owner is deleted. Returns: whether the element is dependent on the owner, and will be deleted when the owner is deleted Default value: "" Since: JDO 2.1
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javax.jdo.InstanceCallbacks

the instance is deleted. Called before the instance is deleted. This method is called before the state transition to persistent-deleted or persistent-new-deleted. Access to field values
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isDeleted(pc)

instance has been deleted. Instances that have been deleted in the current transaction return Boolean.TRUE. Instances known by the implementation to be non-deleted return Boolean.FALSE. Instances not ... if the parameter instance was deleted in the current transaction. Since: JDO 2.0
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isDeleted(pc)

Method javax.jdo.spi.StateManager boolean isDeleted( PersistenceCapable pc ) Tests whether this object has been deleted. Instances that have been deleted in the current transaction return true ... if this instance was deleted in the current transaction. Since: JDO 1.0 See Also: PersistenceManager.deletePersistent(Object pc)
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jdoPreDelete()

Method javax.jdo.listener.DeleteCallback void jdoPreDelete() Called before the instance is deleted. This method is called before the state transition to persistent-deleted or persistent-new-deleted. Access to field values within this call are valid. Access to field values
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jdoIsDeleted()

Method javax.jdo.spi.PersistenceCapable boolean jdoIsDeleted() Tests whether this object has been deleted. Instances that have been deleted in the current transaction return true. Transient instances return false. Returns: true if this instance was deleted in the current transaction. Since: JDO 1.0
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isDeleted(pc)

Static Method javax.jdo.JDOHelper boolean isDeleted( Object pc ) Tests whether the parameter instance has been deleted. Instances that have been deleted in the current transaction return true ... . Parameters: pc - the PersistenceCapable instance. Returns: true if the parameter instance was deleted in

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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