JPA：如何级联修改一个字段以反映另一个字段？

Question

我有以下架构：

@Entity
public class A{
@OneToMany(mappedBy = "dest",cascade = CascadeType.ALL, orphanRemoval = true)
private Collection<C> myDest; //Owns these

@OneToMany(mappedBy = "owner", cascade = CascadeType.ALL, orphanRemoval = true)
private Collection<C> myParents; //can be reached from these 

@ManyToMany
private Collection<B> myOwnB;;
}


@Entity
public class B{
@OneToMany(mappedBy = "forB",cascade = CascadeType.ALL, orphanRemoval = true)
private Collection<C> associatedC;

@ManyToMany(mappedBy = "myOwnB")
private Collection<A> associatedA;
}


@Entity
public class C{
@JoinColumn(referencedColumnName = "myDest")
@ManyToOne
private A dest;

@JoinColumn(referencedColumnName = "myParents")
@ManyToOne
private A owner;

@JoinColumn(referencedColumnName = "associatedC")
@ManyToOne
private B forB;
}

这里，如果删除A或B的记录，则删除所有关联的C。完美。

所以我的问题是： 如果我从A中删除B的引用（在ManyToMany关系中），我需要删除所有C以及A和B.（所有Cs，其中forB = removedB和owner = sourceA）。我现在写了一个类似的查询，它现在可以正常工作，我在EJB中显式执行。是否存在一个变通方法或注释，如果其中一个属性（列）变为空，则会删除C的记录？