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null is returned. A similar method, getReference , can be considered the lazy version of find : Employee employee = em. getReference (Employee.class, 1); The getReference method works like the find ... accessed. The getReference method is useful when a reference to an entity object is required but not

JPA Method in jakarta.persistence.EntityManager T getReference (   T entity ) Obtain a reference to an instance of the entity class of the given object, with the same primary key as ... runtime is permitted but not required to throw the EntityNotFoundException when getReference

JPA Method in jakarta.persistence.EntityManager T getReference (   Class  entityClass,    Object primaryKey ) Obtain a reference to an instance of the given entity ... the EntityNotFoundException when getReference () is called.) This operation allows the application to create

effect. Return: a map of properties and hints currently in effect Since: JPA 2.0 T getReference (Class ... the EntityNotFoundException when getReference () is called.) This operation allows the application to create ... is null EntityNotFoundException - if the entity state cannot be accessed Since: JPA 1.0 T getReference

to instantiate component view at org.jboss.as.ee.component.ViewManagedReferenceFactory. getReference ... :7.1.1.Final] at org.jboss.as.ee.component.ViewManagedReferenceFactory. getReference ... . getReference (ViewManagedReferenceFactory.java:52) [jboss-as-ee-7.1.1.Final.jar:7.1.1.Final] at org

reference obtained by EntityManager. getReference is accessed but the entity does not exist. Thrown ... to it, will be marked for rollback. See Also: EntityManager. getReference EntityManager.refresh EntityManager

to use isMember I have to use: Attribute attributeLastName = em. getReference (Attribute.class

instances (possibly using em. getReference ) rather than create new Category instances

that operation, so find is expected to be a bit faster in that case (and check also getReference