5.2.7. PersistenceHelper
A helper class for obtaining the information on persistent entities. Unlike the Persistence and PersistenceTools beans, this class is available on all tiers.
The PersistenceHelper
bean has the following methods:
-
isLoaded()
- determines if an attribute is loaded from the database. The attribute is loaded if it is included into a view, or if it is a local attribute and a view was not provided to the loading mechanism (EntityManager or DataManager). Only immediate attributes of the entity are supported. -
isNew()
– determines if the passed instance is newly created, i.e., in the New state. Also returnstrue
if this instance is actually in Managed state but newly-persisted in the current transaction, or if it is not a persistent entity. -
isManaged()
- determines if the passed instance is Managed, i.e. attached to a persistence context. -
isDetached()
– determines if the passed instance is in the Detached state. Also returnstrue
, if this instance is not a persistent entity. -
isSoftDeleted()
– determines if the passed entity class supports the soft deletion. -
getEntityName()
– returns the name of the entity specified in the @Entity annotation.