E


EJB

Enterprise Java Beans, a JCP specification for server-side components.

Embedded object

A data object that is stored, when possible, in the datastore as a dependent part of one or more application data objects. Embedded objects are always treated as if they were contained in the application data object that refers to them. As a result, JDO does not support sharing embedded objects, and deleting the application data object implies the deletion of the embedded object. The system classes that a JDO implementation supports are always embedded. Application data objects are usually not embedded, but an implementation, at its option, may support the application's request to embed some application data objects in other, nonembedded, application data objects.

Enhanced class

An application data class that has been modified by the JDO-supplied enhancer tool to support the PersistenceCapable interface.

Evict

To discard the persistent state of an application data object. During eviction, the object's persistent fields are cleared to their Java default values, any extra state stored elsewhere in memory is discarded, and JDO remembers that the fields are not loaded.




Using and Understanding Java Data Objects
Using and Understanding Java Data Objects
ISBN: 1590590430
EAN: 2147483647
Year: 2005
Pages: 156
Authors: David Ezzio

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