项目中用到的JPA Annotation 之二：Inheritance

Target:

Classes

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. If the Inheritance annotation is not specified or if no inheritance type is specified for an entity class hierarchy, the SINGLE_TABLE mapping strategy is used.

Example:

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

@Entity
public class ValuedCustomer { ... }

Since:

JPA 1.0

InheritanceType strategy

The strategy to be used for the entity inheritance hierarchy.

Default value:

javax.persistence.InheritanceType.SINGLE_TABLE

Since:

JPA 1.0