Embeddable (Java EE 5)

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SUMMARY: REQUIRED | OPTIONAL

DETAIL: ELEMENT

javax.persistence Annotation Type Embeddable

@Target(value=TYPE) @Retention(value=RUNTIME) public @interface Embeddable

Implements: Annotation

@Target(value=TYPE)
@Retention(value=RUNTIME)

定义符合以下条件的类：其实例存储为拥有实体的内在部分，并共享实体身份。嵌入对象的各个持久属性或字段都映射到实体的数据库表格。只有 Basic、Column、Lob、Temporal 和 Enumerated 映射注释能够以可移植的方式映射注释为 Embeddable 的类的持久字段或属性。

注意，Transient 注释可以用于指定可嵌入类的非持久状态。

since

Java Persistence 1.0

英文文档：

Defines a class whose instances are stored as an intrinsic part of an owning entity and share the identity of the entity. Each of the persistent properties or fields of the embedded object is mapped to the database table for the entity. Only Basic, Column, Lob, Temporal, and Enumerated mapping annotations may portably be used to map the persistent fields or properties of classes annotated as Embeddable.

Note that the Transient annotation may be used to designate the non-persistent state of an embeddable class.

Since:: Java Persistence 1.0