isLoadedWithReference(entity, attributeName) - JPA ProviderUtil's method
Method
javax.persistence.spi.ProviderUtil
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.
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. )
- Parameters:
-
entity- entity instance -
attributeName- name of attribute whose load status is to be determined
- Returns:
- load status of the attribute
- Since:
- JPA 2.0
This documentation page is derived (with some adjustments) from the open source JPA 2 RI (EclipseLink)
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
and is available under the terms of the Eclipse Public License, v. 1.0 and Eclipse Distribution License, v. 1.0.
Object Relational Mapping (ORM) JPA 2 providers include Hibernate, EclipseLink, TopLink, OpenJPA and DataNucleus.
ObjectDB is not an ORM JPA implementation but an Object Database for Java with built in JPA 2 support.
