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public interface ProviderUtil
Utility interface implemented by the persistence provider. This interface is invoked by thePersistenceUtil
implementation to determine the load status of an entity or entity attribute.- Since:
- Java Persistence 2.0
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Method Summary
All Methods Instance Methods Abstract Methods 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 whichFetchType.EAGER
has been specified have been loaded, this method returnsLoadState.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 returnsLoadState.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 returnsLoadState.LOADED
.
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Method Detail
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isLoadedWithoutReference
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 returnsLoadState.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 returnsLoadState.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.
- Parameters:
entity
- entity instanceattributeName
- name of attribute whose load status is to be determined- Returns:
- load status of the attribute
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isLoadedWithReference
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 returnsLoadState.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 returnLoadState.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
. )- Parameters:
entity
- entity instanceattributeName
- name of attribute whose load status is to be determined- Returns:
- load status of the attribute
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isLoaded
LoadState isLoaded(Object entity)
If the provider determines that the entity has been provided by itself and that the state of all attributes for whichFetchType.EAGER
has been specified have been loaded, this method returnsLoadState.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 returnsLoadState.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.
- Parameters:
entity
- whose loaded status is to be determined- Returns:
- load status of the entity
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Vielen Dank im Voraus.
Dokument erstellt 11/06/2005, zuletzt geändert 18/08/2025
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-javaee-rf-javax/persistence/spi/ProviderUtil.html
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