GenerationType

java.lang.Object
- java.lang.Enum<GenerationType>
- - jakarta.persistence.GenerationType

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<GenerationType>
```
public enum GenerationType
extends java.lang.Enum<GenerationType>
```
Defines the types of primary key generation strategies.

Since:

1.0

See Also:

GeneratedValue

Examples (en):

webservice-inheritance, troubleshooting, transaction-rollback, mvc-cxf, mvc-cxf-hibernate, moviefun, moviefun-rest, jpa-hibernate, jpa-hibernate-arquillian, jpa-eclipselink, ejb-examples

Examples (es):

jpa-hibernate

Examples (pt):

mvc-cxf-hibernate, moviefun-rest, jpa-hibernate, jpa-eclipselink

Enum Constant Summary

Enum Constants
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.
`UUID` Indicates that the persistence provider must assign primary keys for the entity by generating an RFC 4122 Universally Unique IDentifier.

Method Summary

All Methods Static Methods Concrete Methods
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.

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

- Enum Constant Detail
  - TABLE
```
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.
  - SEQUENCE
```
public static final GenerationType SEQUENCE
```
    Indicates that the persistence provider must assign primary keys for the entity using a database sequence.
  - IDENTITY
```
public static final GenerationType IDENTITY
```
    Indicates that the persistence provider must assign primary keys for the entity using a database identity column.
  - UUID
```
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.
  - AUTO
```
public static final GenerationType 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
```
public static GenerationType[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
```
for (GenerationType c : GenerationType.values())
    System.out.println(c);
```
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static GenerationType valueOf(java.lang.String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum 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:
    
    java.lang.IllegalArgumentException - if this enum type has no constant with the specified name
    
    java.lang.NullPointerException - if the argument is null

Enum GenerationType

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

TABLE

SEQUENCE

IDENTITY

UUID

AUTO

Method Detail

values

valueOf