Hi Marina,
In my model, instances of
Offering represent things that a
Vendor
offers for sale.
Product and
Service directly
subclass
Offering and are, themselves, subclassed by classes
representing more specialized kinds of products and services (e.g.,
Subscription,
Garment, et cetera).
A
ShoppingCartItem has an
Offering (as well as a
quantity, a unit price, a collection of
Discounts, et cetera).
I suppose that I could establish a many-to-many relationship between
Offering
and
ShoppingCartItem. Does that strike you as being a good
idea?
Cheers,
Greg
Marina Vatkina wrote:
Hi Greg,
Does it mean that there is no relationship from Offering to Item?
Is it worth adding (and maintaining so that they are always at sync)?
thanks,
-marina
Greg Ederer wrote:
Hi,
I have a method that removes a persistent object from a collection
based on a property of the object being removed, like so:
/**
* Removes all ShoppingCartItems containing this
* offering
*/
public void removeItem(Offering offering)
{
List<ShoppingCartItem> iList = new
ArrayList<ShoppingCartItem>(getItems());
for(ShoppingCartItem i : iList)
{
if(i.getOffering().equals(offering))
{
getItems().remove(i);
}
}
}
Is this the best way to do this?
Cheers,
Greg
p.s.: I'm so glad I found this list. I feel like I've been groping in
the dark with JPA. Thanks for all the help! --G
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