@Entity
public class Parent implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(length = 40)
@GenericGenerator(name = "uid", strategy = "guid")
@GeneratedValue(generator = "uid")
@AccessType(value = "property")
private String id;
@Column(nullable = false)
private String name;
@OneToMany(mappedBy = "parent")
private Set<AbstractChild> childs;
}
@Entity
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
public abstract class AbstractChild implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@Column(length = 40)
@GenericGenerator(name = "uid", strategy = "guid")
@GeneratedValue(generator = "uid")
@AccessType(value = "property")
private String id;
@ManyToOne(optional = false, fetch = FetchType.LAZY)
@JoinColumn(nullable = false)
private Parent parent;
@Column(name = "`state`", nullable = false, length = 20)
private String state;
}
@Entity
public class Child1 extends AbstractChild implements Serializable {
private static final long serialVersionUID = 1L;
@Column(nullable = true, precision = 16, scale = 4)
private BigDecimal field1;
}
@Entity
public class Child2 extends AbstractChild implements Serializable {
private static final long serialVersionUID = 1L;
@Column(name = "`value`", nullable = false)
private String value;
}
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