address를 값 타입으로 빼자

• equals, hashCode 메소드는 generator이용해서 만들어라!
• getter이용해서 값에 접근하는 것이 좋다.

@Embeddable
public class Address {

	private String city;
	private String street;
	private String zipcode;

	public String getCity() {
		return city;
	}

	private void setCity(String city) {
		this.city = city;
	}

	public String getStreet() {
		return street;
	}

	private void setStreet(String street) {
		this.street = street;
	}

	public String getZipcode() {
		return zipcode;
	}

	private void setZipcode(String zipcode) {
		this.zipcode = zipcode;
	}

	@Override
	public boolean equals(Object o) {
		if (this == o) return true;
		if (o == null || getClass() != o.getClass()) return false;
		Address address = (Address) o;
		return Objects.equals(city, address.city) &&
				Objects.equals(street, address.street) &&
				Objects.equals(zipcode, address.zipcode);
	}

	@Override
	public int hashCode() {
		return Objects.hash(city, street, zipcode);
	}
}

@Entity
public class Delivery {

	@Id @GeneratedValue
	private Long id;

	@Embedded
	private Address address;

	private DeliveryStatus status;

	@OneToOne(mappedBy = "delivery")
	private Order order;
}

• 값 타입 사용의 이점 공통 Column규칙을 정할 수 있고 의미있는 메소드를 만들 수 있다.