Package javax.persistence
Annotation Type TableGenerator
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@Repeatable(TableGenerators.class) @Target({TYPE,METHOD,FIELD}) @Retention(RUNTIME) public @interface TableGenerator
Defines a primary key generator that may be referenced by name when a generator element is specified for theGeneratedValue
annotation. A table generator may be specified on the entity class or on the primary key field or property. The scope of the generator name is global to the persistence unit (across all generator types).Example 1: @Entity public class Employee { ... @TableGenerator( name="empGen", table="ID_GEN", pkColumnName="GEN_KEY", valueColumnName="GEN_VALUE", pkColumnValue="EMP_ID", allocationSize=1) @Id @GeneratedValue(strategy=TABLE, generator="empGen") int id; ... } Example 2: @Entity public class Address { ... @TableGenerator( name="addressGen", table="ID_GEN", pkColumnName="GEN_KEY", valueColumnName="GEN_VALUE", pkColumnValue="ADDR_ID") @Id @GeneratedValue(strategy=TABLE, generator="addressGen") int id; ... }
- Since:
- 1.0
- See Also:
GeneratedValue
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Required Element Summary
Required Elements Modifier and Type Required Element Description java.lang.String
name
(Required) A unique generator name that can be referenced by one or more classes to be the generator for id values.
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Optional Element Summary
Optional Elements Modifier and Type Optional Element Description int
allocationSize
(Optional) The amount to increment by when allocating id numbers from the generator.java.lang.String
catalog
(Optional) The catalog of the table.Index[]
indexes
(Optional) Indexes for the table.int
initialValue
(Optional) The initial value to be used to initialize the column that stores the last value generated.java.lang.String
pkColumnName
(Optional) Name of the primary key column in the table.java.lang.String
pkColumnValue
(Optional) The primary key value in the generator table that distinguishes this set of generated values from others that may be stored in the table.java.lang.String
schema
(Optional) The schema of the table.java.lang.String
table
(Optional) Name of table that stores the generated id values.UniqueConstraint[]
uniqueConstraints
(Optional) Unique constraints that are to be placed on the table.java.lang.String
valueColumnName
(Optional) Name of the column that stores the last value generated.
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uniqueConstraints
UniqueConstraint[] uniqueConstraints
(Optional) Unique constraints that are to be placed on the table. These are only used if table generation is in effect. These constraints apply in addition to primary key constraints.Defaults to no additional constraints.
- Default:
- {}
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indexes
Index[] indexes
(Optional) Indexes for the table. These are only used if table generation is in effect. Note that it is not necessary to specify an index for a primary key, as the primary key index will be created automatically.- Since:
- 2.1
- Default:
- {}
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