package ejava.examples.orm.rel.composite;
   
   import javax.persistence.*;
   
   /**
    * This class provides an example use of a composite @EmbeddedId primary key
    * where one of the properties of the Embeddable is re-used as a foreign key.
    */
   @Entity @Table(name="ORMREL_DOOR")
  public class Door {
  	@EmbeddedId
  	@AttributeOverrides({
  		@AttributeOverride(name="houseId", column=@Column(name="HOUSE_ID")),
  		@AttributeOverride(name="doorId", column=@Column(name="DOOR_ID"))
  	})
  	private DoorPK pk;
  	
  	@ManyToOne(fetch=FetchType.LAZY, optional=false)
  	//assign join column to primary key value and turn off inserts/updates here
  	@JoinColumn(name="HOUSE_ID", insertable=false, updatable=false)
  	private House house;
  	
  	public Door() {}
  	public Door(House house, int doorId) {
  		pk=new DoorPK(house.getId(), doorId);
  		this.house=house;
  	}
  	
  	public DoorPK getPk() { return pk; }
  	public House getHouse() { return house; }
  }