public boolean addMember(User user) {
// if member added is the creator, ignore
if (user.getId() == getUser().getId()) return false;
// if member already exists, ignore
boolean exist = false;
for (User item : getUserList()) {
if (item.getId() == user.getId()) {
exist = true;
}
}
if (exist) return false;
// validation complete, add this user
getUserList().add(user);
user.getJoinedProjectList().add(this);
return true;
}
public void removeMember(User user) {
getUserList().remove(user);
user.getJoinedProjectList().remove(this);
}