public interface ProviderUtil
PersistenceUtil
implementation to determine the load status of an entity or
entity attribute.Modifier and Type | Method and Description |
---|---|
LoadState |
isLoaded(Object entity)
If the provider determines that the entity has been provided by itself and that the state of all
attributes for which
FetchType.EAGER has been specified have been loaded, this method
returns LoadState.LOADED . |
LoadState |
isLoadedWithoutReference(Object entity,
String attributeName)
If the provider determines that the entity has been provided by itself and that the state of the
specified attribute has been loaded, this method returns
LoadState.LOADED . |
LoadState |
isLoadedWithReference(Object entity,
String attributeName)
If the provider determines that the entity has been provided by itself and that the state of the
specified attribute has been loaded, this method returns
LoadState.LOADED . |
LoadState isLoadedWithoutReference(Object entity, String attributeName)
LoadState.LOADED
.
If the provider determines that the entity has been provided by itself and that either entity
attributes with FetchType.EAGER
have not been loaded or that the state of the specified
attribute has not been loaded, this methods returns LoadState.NOT_LOADED
.
If a provider cannot determine the load state, this method returns LoadState.UNKNOWN
.
The provider's implementation of this method must not obtain a reference to an attribute value, as this could trigger the loading of entity state if the entity has been provided by a different provider.
entity
- entity instanceattributeName
- name of attribute whose load status is to be determinedLoadState isLoadedWithReference(Object entity, String attributeName)
LoadState.LOADED
.
If a provider determines that the entity has been provided by itself and that either the entity
attributes with FetchType.EAGER
have not been loaded or that the state of the specified
attribute has not been loaded, this method returns return LoadState.NOT_LOADED
.
If the provider cannot determine the load state, this method returns LoadState.UNKNOWN
.
The provider's implementation of this method is permitted to obtain a reference to the attribute value.
(This access is safe because providers which might trigger the loading of the attribute state will have
already been determined by isLoadedWithoutReference
. )
entity
- entity instanceattributeName
- name of attribute whose load status is to be determinedLoadState isLoaded(Object entity)
FetchType.EAGER
has been specified have been loaded, this method
returns LoadState.LOADED
.
If the provider determines that the entity has been provided by itself and that not all attributes with
FetchType.EAGER
have been loaded, this method returns LoadState.NOT_LOADED
.
If the provider cannot determine if the entity has been provided by itself, this method returns
LoadState.UNKNOWN
.
The provider's implementation of this method must not obtain a reference to any attribute value, as this could trigger the loading of entity state if the entity has been provided by a different provider.
entity
- whose loaded status is to be determinedCopyright © 2016. All rights reserved.