Package javax.persistence

Enum Class GenerationType

java.lang.Object
java.lang.Enum<GenerationType>
javax.persistence.GenerationType
All Implemented Interfaces:
Serializable, Comparable<GenerationType>, Constable
public enum GenerationType extends Enum<GenerationType>
Defines the types of primary key generation strategies.
Since:
Java Persistence 1.0
See Also:

  • Nested Class Summary

    Nested classes/interfaces inherited from class java.lang.Enum

    Enum.EnumDesc<E extends Enum<E>>

  • Enum Constant Summary

    Enum Constants
    Enum Constant
    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.

  • Method Summary

    Modifier and Type
    Method
    Description
    static GenerationType
    valueOf(String name)
    Returns the enum constant of this class with the specified name.
    static GenerationType[]
    values()
    Returns an array containing the constants of this enum class, in the order they are declared.

    Methods inherited from class java.lang.Enum

    clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

    Methods inherited from class java.lang.Object

    getClass, notify, notifyAll, wait, wait, wait

  • Enum Constant Details

    • 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.

    • 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 Details

    • values

      public static GenerationType[] values()
      Returns an array containing the constants of this enum class, in the order they are declared.
      Returns:
      an array containing the constants of this enum class, in the order they are declared

    • valueOf

      public static GenerationType valueOf(String name)
      Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified name
      NullPointerException - if the argument is null