Jakarta EE 11.0.0 · jakarta.persistence.GenerationType

Field Summary

Modifier and Type	Field and Description
public static final GenerationType	AUTO Indicates that the persistence provider should pick an appropriate strategy for the particular database.
public static final GenerationType	IDENTITY Indicates that the persistence provider must assign primary keys for the entity using a database identity column.
public static final GenerationType	SEQUENCE Indicates that the persistence provider must assign primary keys for the entity using a database sequence.
public static final GenerationType	TABLE Indicates that the persistence provider must assign primary keys for the entity using an underlying database table to ensure uniqueness.
public static final GenerationType	UUID Indicates that the persistence provider must assign primary keys for the entity by generating an RFC 4122 Universally Unique IDentifier.

Access	Constructor and Description
private	GenerationType()

Modifier and Type	Method and Description
public static GenerationType	valueOf(String name)
public static GenerationType[]	values()

Field Detail

AUTO back to summary

AUTO	back to summary
public static final GenerationType 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.

public static final GenerationType 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.

IDENTITY back to summary

IDENTITY	back to summary
public static final GenerationType 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`.

public static final GenerationType 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.

SEQUENCE back to summary

SEQUENCE	back to summary
public static final GenerationType 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`.

public static final GenerationType 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.

TABLE back to summary

TABLE	back to summary
public static final GenerationType 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`.

public static final GenerationType 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.

UUID back to summary

UUID	back to summary
public static final GenerationType 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`.

public static final GenerationType 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.

public final Enum GenerationType

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