How do I delete orphan entities using hibernate and JPA on a many-to-many relationship?

Question

I want to delete orphan entities using hibernate and JPA on a many-to-many relationship but all that I found was this attribute the attribute. org.hibernate.annotations.Casc

Answer 1

From the book "Pro JPA 2":

Only relationships with single cardinality on the source side can enable orphan removal, which is why the orphanRemoval option is defined on the @OneToOne and @OneToMany relationship annotations, but on neither of the @ManyToOne or @ManyToMany annotations.

It's a bummer, but there is no JPA automated orphan removal for ManyToMany.