Here is a real example taken from code that is working:
I have a User class that has a one to many association with a
Profile(address+email). In the User class I have the following code:
@OneToMany (mappedBy="user")
public Set<ProfileBean> getProfiles(){
return profiles;
}
@Transient
public void addProfile(ProfileBean vp){
vp.setUser(this);
this.getProfiles().add(vp);
}
@Transient
public void removeProfile(ProfileBean vp){
this.getProfiles().remove(vp);
}
public void setProfiles(Set<ProfileBean> profiles) {
this.profiles = profiles;
}
In the Profile class I have the following code:
@ManyToOne
@JoinColumn (name="user_id")
public UserBean getUser(){
return this.user;
}
public void setUser(UserBean user){
this.user = user;
}
To manage the relationship: (for Generic Dao code refer sources for
appfuse-data-common-[version].jar...)
add Profile:
...
UserBean vu = userDao.findById(uid);
ProfileBean vp = new ProfileBean();
///vp.setXxxx(value); etc etc
vu.addProfile(vp);
vp = profileDao.saveProfile(vp);
...
to delete a Profile:
...
ProfileBean vp = profileDao.findById(pid);
UserBean vu = vp.getUser();
vu.removeProfile(vp); //orphans profile
profileDao.deleteProfile(vp); //deletes the orphan
...
Hope that is enough to get you started on the right path. Another reference
you might find useful is
http://www.hibernate.org/hib_docs/v3/reference/en/html/example-parentchild.html
Although examples use xml mapping rather than annotations but logic still
follows.
Luke.
Luke McLean wrote:
>
> .... I will find some more detailed code and post a complete tomorrow.
>
>
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