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public interface PersistenceUnitUtil
Utility interface between the application and the persistence provider managing the persistence unit.
The methods of this interface should only be invoked on entity instances obtained from or managed by entity managers for this persistence unit or on new entity instances.
Method Summary | |
---|---|
java.lang.Object |
getIdentifier(java.lang.Object entity)
Return the id of the entity. |
boolean |
isLoaded(java.lang.Object entity)
Determine the load state of an entity belonging to the persistence unit. |
boolean |
isLoaded(java.lang.Object entity,
java.lang.String attributeName)
Determine the load state of a given persistent attribute of an entity belonging to the persistence unit. |
Method Detail |
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boolean isLoaded(java.lang.Object entity, java.lang.String attributeName)
isLoaded
in interface PersistenceUtil
entity
- entity instance containing the attributeattributeName
- name of attribute whose load state is
to be determined
boolean isLoaded(java.lang.Object entity)
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.
isLoaded
in interface PersistenceUtil
entity
- entity instance whose load state is to be determined
java.lang.Object getIdentifier(java.lang.Object entity)
entity
- entity instance
IllegalArgumentException
- if the object is found not
to be an entity
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Generated on 10-February-2011 12:41