On 19 Dec (09:20), Jim Downing wrote:
> Thanks - I'd used the advance in Tom's manual to do the mapping, but I
> was trying to maintain the relationship in my persistent objects
> (rather than making the client do it, as in the FAQ), which was
> probably the cause of my problems.
Thats exactly what I'm doing:
class Child {
public setParent(Parent newParent) {
// Remove myself from old Parent
if (this.parent != null) {
this.parent.getChildren().remove(this);
}
// Add to new Parent
newParent.getChildren().add(this);
// Set new Parent
this.parent = newParent;
}
}
This is similar to the Composite Pattern (or better, a part of it):
http://www.idg.net/english/crd_composite_948016.html
--
Christian Bauer
[EMAIL PROTECTED]
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