Annotation Interface IdClass


@Target(TYPE) @Retention(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:
1.0
  • Required Element Summary

    Required Elements
    Modifier and Type
    Required Element
    Description
    Primary key class
  • Element Details

    • value

      Class value
      Primary key class