package myorg.relex.one2one;
   
   import javax.persistence.*;
   
   /**
    * This class is an example of the inverse/parent side of a one-to-one, 
    * bi-directional relationship that allows 0..1 and changing related entities.
    */
   @Entity(name="RelationAuto")
  @Table(name="RELATIONEX_AUTO")
  public class Auto {
  	public enum Type { CAR, TRUCK };
  	
  	@Id @GeneratedValue
  	private int id;
  	@Enumerated(EnumType.STRING)
  	@Column(length=10)
  	private Type type;
  	
  	@OneToOne(
  			mappedBy="auto", 
  			optional=true, fetch=FetchType.LAZY)
  	private Driver driver;
  	
  	public Auto() {}
  	public int getId() { return id;}
  
  	public Type getType() { return type; }
  	public void setType(Type type) {
  		this.type = type;
  	}
  
  	public Driver getDriver() { return driver; }
  	public void setDriver(Driver driver) {
  		this.driver = driver;
  	}
  }