Add a transformer supplied by the provider that will be
called for every new class definition or class redefinition
that gets loaded by the loader returned by the
PersistenceInfo.getClassLoader method.
Thrown by the persistence provider when an entity reference obtained by
EntityManager.getReference(Class,Object) is accessed but the entity does not exist.
The javax.persistence package contains the classes and interfaces that define the contracts
between a persistence provider and the managed classes and the clients of the Java Persistence API.
The javax.persistence.spi package defines the classes and interfaces that are implemented by the
persistence provider and the Java EE container for use by the container, provider, and/or Persistence
bootstrap class in deployment and bootstrapping.
This annotation defines a primary key generator that may be referenced by name when a generator
element is specified for the GeneratedValue annotation.
This annotation defines a primary key generator that may be referenced by name when a generator
element is specified for the GeneratedValue annotation.