程序包 org.hibernate.annotations

注释类型 ValueGenerationType

@Target(ANNOTATION_TYPE)
@Retention(RUNTIME)
public @interface ValueGenerationType

Marks an annotation type as a generator annotation type.

Adding a generator annotation to an entity property causes the value of the property to be generated upon insert or update of the owning entity. Not more than one generator annotation may be placed on a given property.

Each generator annotation type is associated with a AnnotationValueGeneration which implements the strategy for generating the value. Generator annotation types may define arbitrary custom attributes, e.g. allowing the client to configure the generation timing (if applicable) or other settings taking an effect on the value generation. The corresponding implementation can retrieve these settings from the annotation instance passed to AnnotationValueGeneration.initialize(java.lang.annotation.Annotation, Class).

Custom generator annotation types must have retention policy RetentionPolicy.RUNTIME.

作者:

Gunnar Morling

必需元素概要

所需元素

修饰符和类型	必需的元素	说明
Class<? extends AnnotationValueGeneration<?>>	generatedBy	The type of value generation associated with the annotated value generator annotation type.

元素详细资料

generatedBy

Class<? extends AnnotationValueGeneration<?>> generatedBy

The type of value generation associated with the annotated value generator annotation type. The referenced generation type must be parameterized with the type of the given generator annotation.

返回:

the value generation type