Types Of Primary Key Generation In Hibernate

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Defines the types of primary key generation strategies.

Since:: Java Persistence 1.0
See Also:: GeneratedValue

Enum Constant Summary
`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.

Method Summary
`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, inthe order they are declared.

Methods inherited from class java.lang.Enum
`clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

Methods inherited from class java.lang.Object
`getClass, notify, notifyAll, wait, wait, wait`

Hibernate Primary Key Generation Types

Enum Constant Detail

TABLE

Indicates that the persistence provider must assign primary keys for the entity using an underlying database table to ensure uniqueness.

SEQUENCE

Indicates that the persistence provider must assign primary keys for the entity using a database sequence.

IDENTITY

Indicates that the persistence provider must assign primary keys for the entity using a database identity column.

AUTO

Indicates that the persistence provider should pick an appropriate strategy for the particular database. 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.

Method Detail

values

Returns an array containing the constants of this enum type, inthe order they are declared. This method may be used to iterateover the constants as follows:

Returns:: an array containing the constants of this enum type, inthe order they are declared

valueOf

Returns the enum constant of this type with the specified name.The string must match exactly an identifier used to declare anenum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:: name - the name of the enum constant to be returned.
Returns:: the enum constant with the specified name
Throws:: IllegalArgumentException - if this enum type has no constantwith the specified name; java.lang.NullPointerException - if the argument is null

Types Of Primary Key Generation In Hibernate Windows 10

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