Delete orphaned objects on the many side in Hibernate

Goal

To delete the "orphaned" associated object on the many side of a one-to-many association. The ORM framework is Hibernate + Hibernate Annotations.

Solution

make the One side the owner of the relationship: avoid the mappedBy annotation propery
add the hibernate specific @Cascade annotation

prevent setting the collection directly

public class Bar {

    @OneToMany(cascade = {CascadeType.MERGE, CascadeType.PERSIST})
    @JoinColumn(name="barId")
    @Cascade({org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.DELETE_ORPHAN})
    private List<Foo> foos;

    protected setFoos(List<Foo> foos) {
        this.foos = foos;
    }

    public void addFoo(Foo foo) {
        this.getFoos().add(foo);
        foo.setBar(this);
    }
}

Delete orphaned objects on the many side in Hibernate

Goal

Solution

References

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