javax.persistence

Interface PersistenceUtil

All Known Subinterfaces:

PersistenceUnitUtil

public interface PersistenceUtil

Utility interface between the application and the persistence provider(s).

The PersistenceUtil interface instance obtained from the Persistence class is used to determine the load state of an entity or entity attribute regardless of which persistence provider in the environment created the entity.

Since:

Java Persistence 2.0

Method Summary

Methods

Modifier and Type	Method and Description
boolean	isLoaded(Object entity) Determine the load state of an entity.
boolean	isLoaded(Object entity, String attributeName) Determine the load state of a given persistent attribute.

Method Detail

isLoaded

boolean isLoaded(Object entity,
               String attributeName)

Determine the load state of a given persistent attribute.

Parameters:

entity - entity containing the attribute

attributeName - name of attribute whose load state is to be determined

Returns:

false if entity's state has not been loaded or if the attribute state has not been loaded, else true

isLoaded

boolean isLoaded(Object entity)

Determine the load state of an entity. This method can be used to determine the load state of an entity passed as a reference. An entity is considered loaded if all attributes for which FetchType.EAGER has been specified have been loaded.

The isLoaded(Object, String) method should be used to determine the load state of an attribute. Not doing so might lead to unintended loading of state.

Parameters:

entity - whose load state is to be determined

Returns:

false if the entity has not been loaded, else true