Package org.hibernate

Interface NaturalIdLoadAccess<T>

  • public interface NaturalIdLoadAccess<T>
    Loads an entity by its natural identifier.
    See Also:
    • Method Detail

      • using

        NaturalIdLoadAccess<T> using​(java.lang.String attributeName,
                                     java.lang.Object value)
        Add a NaturalId attribute value.
        attributeName - The entity attribute name that is marked as a NaturalId
        value - The value of the attribute
        this, for method chaining
      • setSynchronizationEnabled

        NaturalIdLoadAccess<T> setSynchronizationEnabled​(boolean enabled)
        For entities with mutable natural ids, should Hibernate perform "synchronization" prior to performing lookups? The default is to perform "synchronization" (for correctness).

        "synchronization" here indicates updating the natural-id -> pk cross reference maintained as part of the session. When enabled, prior to performing the lookup, Hibernate will check all entities of the given type associated with the session to see if its natural-id values have changed and, if so, update the cross reference. There is a performance impact associated with this, so if application developers are certain the natural-ids in play have not changed, this setting can be disabled to circumvent that impact. However, disabling this setting when natural-ids values have changed can result in incorrect results!

        enabled - Should synchronization be performed? true indicates synchronization will be performed; false indicates it will be circumvented.
        this, for method chaining
      • getReference

        T getReference()
        Return the persistent instance with the natural id value(s) defined by the call(s) to using(java.lang.String, java.lang.Object). This method might return a proxied instance that is initialized on-demand, when a non-identifier method is accessed. You should not use this method to determine if an instance exists; to check for existence, use load() instead. Use this only to retrieve an instance that you assume exists, where non-existence would be an actual error.
        the persistent instance or proxy
      • load

        T load()
        Return the persistent instance with the natural id value(s) defined by the call(s) to using(java.lang.String, java.lang.Object), or null if there is no such persistent instance. If the instance is already associated with the session, return that instance, initializing it if needed. This method never returns an uninitialized instance.
        The persistent instance or null
      • loadOptional

        java.util.Optional<T> loadOptional()
        Same semantic as load() except that here Optional is returned to handle nullability.
        The persistent instance, if one, wrapped in Optional