Inheritance (Java EE 5)

Java EE API

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SUMMARY: REQUIRED | OPTIONAL

DETAIL: ELEMENT

javax.persistence Annotation Type Inheritance

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

Implements: Annotation

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

定义要对实体类分层结构使用的继承战略。它是对实体类分层结构的根实体类指定的。

示例：

   @Entity
   @Inheritance(strategy=JOINED)
   public class Customer { ... }

   @Entity
   public class ValuedCustomer extends Customer { ... }

since

Java Persistence 1.0

英文文档：

Defines the inheritance strategy to be used for an entity class hierarchy. It is specified on the entity class that is the root of the entity class hierarchy.

   Example:

   @Entity
   @Inheritance(strategy=JOINED)
   public class Customer { ... }

   @Entity
   public class ValuedCustomer extends Customer { ... }

Since:: Java Persistence 1.0

Optional Element Summary
`InheritanceType`	`strategy` The strategy to be used

abstract public InheritanceType strategy()
要使用的战略

英文文档：
strategy

public abstract InheritanceType strategy

The strategy to be used

Default:: SINGLE_TABLE