@Embeddable
public class Address {
    private String street;
    private String city;
}

@Entity
public class Customer {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Embedded
    private Address address;
}

@Entity
public class Product {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @ElementCollection
    private List<String> tags;
}

@Entity
@Inheritance(strategy = InheritanceType.JOINED)
public abstract class Vehicle {
    @Id
    private Long id;
}

@Entity
public class Car extends Vehicle {
    private int seatingCapacity;
}

@Entity
@Cacheable
public class Product {
    @Id
    private Long id;
    private String name;
}

@Lock(LockModeType.PESSIMISTIC_WRITE)
@Query("SELECT u FROM User u WHERE u.id = :id")
User findForUpdate(@Param("id") Long id);

@Entity
@EntityListeners(AuditListener.class)
public class Order {
    @Id
    private Long id;
}

@SQLInsert(sql = "INSERT INTO user_audit (id, username) VALUES (?, ?)")
@SQLDelete(sql = "DELETE FROM user_audit WHERE id = ?")
@Entity
public class UserAudit {
    @Id
    private Long id;
}

@ElementCollection
@CollectionTable(
    name = "phone_numbers",
    joinColumns = @JoinColumn(name = "user_id"),
    uniqueConstraints = @UniqueConstraint(columnNames = {"user_id", "phone_number"}),
    indexes = @Index(columnList = "phone_number")
)
@Column(name = "phone_number")
private Set<String> phoneNumbers;