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SUMMARY: NESTED | ENUM CONSTANTS | FIELD | METHOD | DETAIL: ENUM CONSTANTS | FIELD | METHOD |
java.lang.Objectjava.lang.Enum<GenerationType>
javax.persistence.GenerationType
public enum GenerationType
Defines the types of primary key generation strategies.
GeneratedValue
Enum Constant Summary | |
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AUTO
Indicates that the persistence provider should pick an appropriate strategy for the particular database. |
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IDENTITY
Indicates that the persistence provider must assign primary keys for the entity using a database identity column. |
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SEQUENCE
Indicates that the persistence provider must assign primary keys for the entity using a database sequence. |
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TABLE
Indicates that the persistence provider must assign primary keys for the entity using an underlying database table to ensure uniqueness. |
Method Summary | |
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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 |
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clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf |
Methods inherited from class java.lang.Object |
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getClass, notify, notifyAll, wait, wait, wait |
Enum Constant Detail |
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public static final GenerationType TABLE
public static final GenerationType SEQUENCE
public static final GenerationType IDENTITY
public static final GenerationType AUTO
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 |
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public static GenerationType[] values()
for (GenerationType c : GenerationType.values()) System.out.println(c);
public static GenerationType valueOf(java.lang.String name)
name
- the name of the enum constant to be returned.
java.lang.IllegalArgumentException
- if this enum type has no constant
with the specified name
java.lang.NullPointerException
- if the argument is null
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