JPA删除Orphans

如果JPA要删除Orphans?, 用?orphanRemoval=true?,?

@Entityclass Employee { : @OneToMany(orphanRemoval=true) private List<Address> addresses; :}?

?

In this case, removal of an Address object from the collection leads to automatic removal of that object from the database.

http://www.objectdb.com/java/jpa/persistence/delete
http://www.objectdb.com/java/jpa/persistence/crud
http://stackoverflow.com/questions/306144/jpa-cascadetype-all-does-not-delete-orphans?，?http://en.wikibooks.org/wiki/Java_Persistence/Relationships#Orphan_Removal_.28JPA_2.0.29