javax.persistence
Enum GenerationType

java.lang.Object
  extended by java.lang.Enum<GenerationType>
      extended by javax.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:
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, 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.


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:
IllegalArgumentException - if this enum type has no constant with the specified name
java.lang.NullPointerException - if the argument is null


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Generated on 10-February-2011 12:41


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