package myorg.relex.one2manybi;
   
   import javax.persistence.*;
   
   /**
    * This class provides an example of the many/owning side of a many-to-one, bi-directional 
    * relationship mapped using a foreign key and that foreign key is used to derive the 
    * primary key of this class.
    */
  @Entity
  @Table(name="RELATIONEX_TIRE")
  @IdClass(TirePK.class)
  public class Tire {
  	@Id
  	@ManyToOne
  	@JoinColumn(name="CAR_ID", nullable=false)
  	private Car car;
  	
  	@Id @Enumerated(EnumType.STRING)
  	@Column(length=16)
  	private TirePosition position;
  	
  	private int miles;
  	
  	protected Tire() {}
  	public Tire(Car car, TirePosition position) {
  		this.car = car;
  		this.position = position;
  	}
  
  	public TirePosition getPosition() { return position; }
  	public Car getCar() { return car; }
  	
  	public int getMiles() { return miles; }
  	public void setMiles(int miles) {
  		this.miles = miles;
  	}
  	
  	@Override
  	public int hashCode() {
  		return position.hashCode();
  	}
  	@Override
  	public boolean equals(Object obj) {
  		try {
  			if (this==obj) { return true; }
  			Tire rhs = (Tire)obj;
  			return car.equals(rhs.car) && position==rhs.position; 
  		} catch (Exception ex) { return false; }
  	}
  }