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javax.persistence
Annotation Type IdClass

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@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

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Required Element Summary
Class	value Primary key class

Element Detail

value

public abstract Class value

Primary key class

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Overview Package Class Tree Deprecated Index Help		Java EE 5 SDK
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SUMMARY: REQUIRED | OPTIONAL	DETAIL: ELEMENT

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