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About Question enthuware.oce-jpad.v6.2.587 :

Posted: Thu Nov 15, 2018 3:34 pm
by Martin
Why is a @ElementCollection Annotation correct? It clearly states that when the map has an Entity as key, it must be a relationship Annotation. The ElementCollection is for embeddables and primitives only.

Re: About Question enthuware.oce-jpad.v6.2.587 :

Posted: Sat Jan 05, 2019 1:01 am
by admin
ElementCollection can be used for entities also. Example 2 on page 396 of JPA 2.0 specification uses it:

Code: Select all

public class VideoStore {
  @Id int id;
  String name;
  Address location;
  @MapKeyJoinColumn(name="MOVIE", referencedColumnName="ID")
  Map<Movie, Integer> videoInventory;

  public class Movie {
  @Id long id;
  String title;