ObjectDB Database Search

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

Jakarta Persistence (JPA) Method in jakarta.persistence.EntityManager T getReference (    T entity ) Obtain a reference to an instance of the entity class of the given object ... when getReference () is called.) This operation allows the application to create an association

it. If the object is not in the database, find returns null . A similar method, getReference , is a lazy version of find : Employee employee = em. getReference (Employee.class, 1); The getReference method ... , getReference might return a hollow object instead of querying the database immediately. It never returns null

. This commonly occurs during EntityManager.refresh or EntityManager. getReference calls. Concurrency

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 ... (JPA) 1.0 T getReference ( T entity ) Obtain a reference to an instance of the entity class

by the persistence provider when an entity reference obtained by EntityManager. getReference ... . getReference (Class,Object) EntityManager.refresh(Object) EntityManager.refresh(Object, LockModeType

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

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

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

objects (by ids) from EntityManager. getReference . One  more point. Moving  byte[] picture

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