IdClass (Java EE 5 SDK) - Java Platform, Enterprise Edition v5.0 API Specifications

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Java EE 5 SDK

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SUMMARY: REQUIRED | OPTIONAL

DETAIL: ELEMENT

javax.persistence
Annotation Type IdClass

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

Specifies a composite primary key class that is mapped to multiple fields or properties of the entity.

The names of the fields or properties in the primary key class and the primary key fields or properties of the entity must correspond and their types must be the same.


   Example:

   @IdClass(com.acme.EmployeePK.class)
   @Entity
   public class Employee {
     @Id String empName;
     @Id Date birthDay;
     ...
   }

Since:: Java Persistence 1.0

Required Element Summary

Class value
Primary key class

Required Element Summary
`Class`	`value` Primary key class

Element Detail

value

public abstract Class value

Primary key class