【JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-004Table per class hierarchy(@Inheritance..SINGLE_TABLE)、@DiscriminatorColumn、@DiscriminatorValue、@DiscriminatorFormula)】的更多相关文章

JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-005Table per subclass with joins(@Inheritance(strategy = InheritanceType.JOINED)、@PrimaryKeyJoinColumn、)

一.结构 The fourth option is to represent inheritance relationships as SQL foreign key associations. Every class/subclass that declares persistent properties—including abstract classes and even interfaces—has its own table.Unlike the table-per-concrete-…

JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-008Polymorphic many-to-one associations(@ManyToOne、@Inheritance、)

一.结构 二.代码 1. package org.jpwh.model.inheritance.associations.manytoone; import org.jpwh.model.Constants; import javax.persistence.*; import javax.validation.constraints.NotNull; // Can not be @MappedSuperclass when it's a target class in associations…

JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-006Mixing inheritance strategies(@SecondaryTable、@PrimaryKeyJoinColumn、<join fetch="select">)

一.结构 For example, you can map a class hierarchy to a single table, but, for a particular subclass, switch to a separate table with a foreign key–mapping strategy, just as with table-per-subclass. 二.代码 1. package org.jpwh.model.inheritance.mixed; impo…

JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-004Table per class hierarchy(@Inheritance..SINGLE_TABLE)、@DiscriminatorColumn、@DiscriminatorValue、@DiscriminatorFormula)

一.结构 You can map an entire class hierarchy to a single table. This table includes columns for all properties of all classes in the hierarchy. The value of an extra type discriminator column or formula identifies the concrete subclass represented by a…

JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-003Table per concrete class with unions(@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)、<union-subclass>)

一.代码 1. package org.jpwh.model.inheritance.tableperclass; import org.jpwh.model.Constants; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Inheritance; import javax.persi…

JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-002Table per concrete class with implicit polymorphism(@MappedSuperclass、@AttributeOverride)

一.结构 二.代码 1. package org.jpwh.model.inheritance.mappedsuperclass; import javax.persistence.MappedSuperclass; import javax.validation.constraints.NotNull; @MappedSuperclass public abstract class BillingDetails { @NotNull protected String owner; // ...…

JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-001Hibernate映射继承的方法

There are four different strategies for representing an inheritance hierarchy: Use one table per concrete class and default runtime polymorphic behavior. Use one table per concrete class but discard polymorphism and inheritance relationships comple…

JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-009Polymorphic collections(@OneToMany(mappedBy = "user")、@ManyToOne、)

一.代码 1. package org.jpwh.model.inheritance.associations.onetomany; import org.jpwh.model.Constants; import javax.persistence.*; import javax.validation.constraints.NotNull; // Can not be @MappedSuperclass when it's a target class in associations! @En…

JavaPersistenceWithHibernate第二版笔记-第六章-Mapping inheritance-007Inheritance of embeddable classes(@MappedSuperclass、@Embeddable、@AttributeOverrides、、)

一.结构 二.代码 1. package org.jpwh.model.inheritance.embeddable; import javax.persistence.MappedSuperclass; import javax.validation.constraints.NotNull; @MappedSuperclass public abstract class Measurement { @NotNull protected String name; @NotNull protect…

JavaPersistenceWithHibernate第二版笔记-第五章-Mapping value types-007UserTypes的用法(@org.hibernate.annotations.Type、@org.hibernate.annotations.TypeDefs、CompositeUserType、DynamicParameterizedType、、、)

一.结构 二.Hibernate支持的UserTypes接口  UserType —You can transform values by interacting with the plain JDBC PreparedStatement (when storing data) and ResultSet (when loading data).By implementing this interface, you can also control how Hibernate caches a…