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Cade/Shiel part 2 worked example -bid object multiplicity confusion

chris J Smith
Greenhorn

Joined: Dec 29, 2011
Posts: 8
Hi Ranchers,
I'm a newbie so go easy.
I've been looking through the part 2 worked example in the Cade book and I'm unsure as to why the multiplicity of the Bid - Bidder association is different in the domain model on page 169 and the class diagram on page 172. In the domain model the relationship is that a bid can have one bidder but a bidder can have 0 to many bids whereas in the class diagram a Bid class is associated with 0 to many Bidder classes and the multiplicity from Bidder to Bid has gone. Is this a definite change or just a printing error? I thought it was a no no to change the given domain model like this? To me the relationship in the domain model makes sense so the change is confusing.

I'd be interested to know your thoughts.

Chris
kumar naresh
Ranch Hand

Joined: Mar 12, 2011
Posts: 120
    
    1
Hi Smith,

I think its a print mistake, relationship has to follow Bid 0..n ---- 1 Bidder same thing, in the image 0..n and 1 got closer and 1 got mixed in the line.

Kumar.


OCMJEA 5 |
http://sceacertification.blogspot.in/2011_12_01_archive.html
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: Cade/Shiel part 2 worked example -bid object multiplicity confusion