public enum GenerationType extends java.lang.Enum<GenerationType>
GeneratedValue
Enum Constant and Description |
---|
AUTO
Indicates that the persistence provider should pick an
appropriate strategy for the particular database.
|
IDENTITY
Indicates that the persistence provider must assign
primary keys for the entity using a database identity column.
|
SEQUENCE
Indicates that the persistence provider must assign
primary keys for the entity using a database sequence.
|
TABLE
Indicates that the persistence provider must assign
primary keys for the entity using an underlying
database table to ensure uniqueness.
|
Modifier and Type | Method and Description |
---|---|
static GenerationType |
valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name.
|
static GenerationType[] |
values()
Returns an array containing the constants of this enum type, in
the order they are declared.
|
public static final GenerationType TABLE
public static final GenerationType SEQUENCE
public static final GenerationType IDENTITY
public static final GenerationType AUTO
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 GenerationType[] values()
for (GenerationType c : GenerationType.values()) System.out.println(c);
public static GenerationType valueOf(java.lang.String name)
name
- the name of the enum constant to be returned.java.lang.IllegalArgumentException
- if this enum type has no constant
with the specified namejava.lang.NullPointerException
- if the argument is null