javax.persistence.GenerationType - JPA enum
javax.persistence
Enum GenerationType
java.lang.Object
java.lang.Enum<javax.persistence.GenerationType>
javax.persistence.GenerationType
- Implemented Interfaces:
-
Serializable,Comparable<GenerationType>
Defines the types of primary key generation strategies.
- Since:
- JPA 1.0
- See Also:
-
GeneratedValue
Learn how to define and use automatic value generation in Chapter 2 of the ObjectDB/JPA manual.
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. - Since:
- JPA 1.0
Indicates that the persistence provider must assign primary keys for the entity using a database identity column.
- Since:
- JPA 1.0
Indicates that the persistence provider must assign primary keys for the entity using a database sequence.
- Since:
- JPA 1.0
Indicates that the persistence provider must assign primary keys for the entity using an underlying database table to ensure uniqueness.
- Since:
- JPA 1.0
GenerationType valueOf(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.
- 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
Returns an array containing the constants of this enum type.
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
