Re: Subclassing
Re: Subclassing
- Subject: Re: Subclassing
- From: j o a r <email@hidden>
- Date: Fri, 18 Apr 2008 16:02:00 -0700
On Apr 18, 2008, at 2:56 PM, K. Darcy Otto wrote:
The only reason to subclass Deduction (with SDeduction) and then
DeductionLine (with SDeductionLine) is to get an SDependency
object. Is there an easier way? I suppose I could just copy the
Dependency class files and then modify it for this particular
project; but I was hoping for a different way. Thanks.
I think that what you would typically do is either to add:
"-[DeductionLine initWithDependency:]"
// Where Deduction line doesn't know, or care about, what particular
// type of object is being passed, as long as it is either a subclass
of
// Dependency, or it conforms to a specific protocol.
Or something like:
"-[DeductionLine initWithProperty:]"
// Where the caller doesn't know about different Dependency classes,
// and instead specify some type of configuration / context property,
to
// which the DeductionLine responds by instantiating an appropriate
// Dependency subclass.
j o a r
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| | >Subclassing (From: "K. Darcy Otto" <email@hidden>) |