JEE JPA 2.0

Notes from

• Automatic Orphan Deletion

  @Entity public class Order {
    @Id int orderId;
    ...
    @OneToMany(cascade=PERSIST, orphanRemoval=true)
    Set<Item> lineItems;
  }

• Validation
  • Automatic validation upon lifecycle events: PrePersist, PreUpdate, PreRemove
  • Validation-mode element in persistence.xml: AUTO, CALLBACK, NONE
  • Example:

    @Entity public class Employee {
      @Id Integer id
      String name;
      @Max(15) Integer vacationDays;
      @Valid Address worksite;
      // ...
    }
    
    @Embeddable public class Address {
      @Size(max=30) String street;
      @Size(max=20) String city;
      @Zipcode String zipcode;
      // ...
    }