Jakarta Persistence (JPA) Enum

jakarta.persistence.GenerationType

java.lang.Object
  ∟java.lang.Enum<jakarta.persistence.GenerationType>
    ∟jakarta.persistence.GenerationType
Implemented Interfaces:
Constable, Comparable<E>, Serializable
Enumerates the defined primary key generation strategies.
See Also:
Since:
Jakarta Persistence (JPA) 1.0
The Auto Generated Values article explains how to use GenerationType.

Enum Constants

AUTO
Indicates that the persistence provider should pick an appropriate strategy for the particular database.
  • For a primary key of type java.util.UUID or String, this is equivalent to UUID.
  • For a primary key of type Long, Integer, long, or int, the provider selects between TABLE, SEQUENCE, and IDENTITY.

The AUTO generation strategy may expect a database resource to exist, or it may attempt to create one. A vendor may provide documentation on how to create such resources in the event that it does not support schema generation or cannot create the schema resource at runtime.

Since:
Jakarta Persistence (JPA) 1.0
IDENTITY
Indicates that the persistence provider must assign primary keys for the entity using a database identity column.

May be used to generate primary keys of type Long, Integer, long, or int.

Since:
Jakarta Persistence (JPA) 1.0
SEQUENCE
Indicates that the persistence provider must assign primary keys for the entity using a database sequence.

May be used to generate primary keys of type Long, Integer, long, or int.

Since:
Jakarta Persistence (JPA) 1.0
TABLE
Indicates that the persistence provider must assign primary keys for the entity using an underlying database table to ensure uniqueness.

May be used to generate primary keys of type Long, Integer, long, or int.

Since:
Jakarta Persistence (JPA) 1.0
UUID
Indicates that the persistence provider must assign primary keys for the entity by generating an RFC 4122 Universally Unique IDentifier.

May be used to generate primary keys of type java.util.UUID or String.

Since:
Jakarta Persistence (JPA) 1.0

Synthetic Public Static Methods:

values(), valueOf(String)

Additional JDK methods inherited from java.lang.Enum

java.lang.Enum/clone(), java.lang.Enum/compareTo(E), java.lang.Enum/describeConstable(), java.lang.Enum/equals(Object), java.lang.Enum/finalize(), java.lang.Enum/getDeclaringClass(), java.lang.Enum/hashCode(), java.lang.Enum/name(), java.lang.Enum/ordinal(), java.lang.Enum/readObject(ObjectInputStream), java.lang.Enum/readObjectNoData(), java.lang.Enum/toString(), java.lang.Enum/valueOf(Class,String)

Additional JDK methods inherited from java.lang.Object

java.lang.Object/clone(), java.lang.Object/equals(Object), java.lang.Object/finalize(), java.lang.Object/getClass(), java.lang.Object/hashCode(), java.lang.Object/notify(), java.lang.Object/notifyAll(), java.lang.Object/toString(), java.lang.Object/wait(), java.lang.Object/wait(long), java.lang.Object/wait(long,int), java.lang.Object/wait0(long)

Additional JDK methods inherited from java.lang.constant.Constable

java.lang.constant.Constable/describeConstable()

Additional JDK methods inherited from java.lang.Comparable

java.lang.Comparable/compareTo(T)