@Entity(name = "ResourceIdentity")
	@Table(name = "RESOURCE_IDENTITY")
	@Access(AccessType.FIELD)
	public static class ResourceIdentity {
		Long id;

		@Id
		@Column(name = "ID")
		@Access(AccessType.PROPERTY)
		@GeneratedValue(strategy = GenerationType.SEQUENCE)
		public Long getId() {
			return id;
		}

		public void setId(Long id) {
			this.id = id;
		}
	}

	@Entity(name = "ResourceUnit")
	@Table(name = "RESOURCE_UNIT")
	@Access(AccessType.FIELD)
	public static class ResourceUnit {

		Long id;

		@Id
		@Column(name = "ID")
		@Access(AccessType.PROPERTY)
		@GeneratedValue(strategy = GenerationType.SEQUENCE)
		public Long getId() {
			return id;
		}

		public void setId(Long id) {
			this.id = id;
		}

		@OneToOne(optional = false, fetch = FetchType.LAZY, cascade = CascadeType.ALL)
		@JoinColumn(name = "id")
		@MapsId
		private ResourceIdentity identity;

		public ResourceIdentity getIdentity() {
			return identity;
		}

		public void setIdentity(ResourceIdentity identity) {
			this.identity = identity;
		}
	}