javax.persistence

Annotation Type IdClass

Contents

  • @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

    • Element Detail

      • value

        public abstract Class value
        Primary key class

Document created the 11/06/2005, last modified the 18/08/2025
Source of the printed document:https://www.gaudry.be/en/java-api-javaee-rf-javax/persistence/IdClass.html

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References

  1. View the html document Language of the document:fr Manuel PHP : https://docs.oracle.com, IdClass (Java(TM) EE 7 Specification APIs)

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