I've got a private field in a Department class that is a SortedSet,
which is made available to clients as an ImmutableSet, like so:
protected ISet<StaffMember> _employees = new
SortedSet<StaffMember>();
public virtual ISet<StaffMember> Employees {
get { return new ImmutableSet<StaffMember>(_employees); }
protected set { _employees = value; }
}
This does make the Employees property readonly, but I'm getting an
error from NHibernate saying that the list is immutable when I try to
add to the list, for which I have the following method:
public virtual void AddEmployee(StaffMember staffMember)
{ _employees.Add(staffMember); }
The primary consumer of this method right now is the StaffMember class
on the other side of the relationship. It has a Department reference
which looks like:
private Department _department;
public virtual Department Department {
get { return _department; }
set {
if(_department == null || _department.Equals(value)
throw new ArgumentException(...);
_department = value;
_department.AddEmployee(this);
}
}
I might not have mapped the relationship properly, but is there a
better way to expose the set than with an ImmutableSet to make it
readonly?
Thanks for sharing,
Berryl
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