Re: How to make a class an alias of another one?
- From: Lew <fuehrerwannabe@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Sat, 30 Aug 2008 16:24:56 GMT
Joie Space wrote:
Lew wrote:Hence the consortium where I said, "gives the objective of".
This gives the appearance of an antipattern: one should not hardcode
subclasses into their parent classes.
Given the simplicity of the request, I didn't see the need to make a
third class whose function was just a factory for ClassA and subclasses.
Gold plating -- needlessly complex design -- is an anti-pattern too. If
refactoring is required later, well, refactor. It happens.
I thought your assumption was a bitter laboratory for the types of pragmatic
emotions one makes knowing the awards of those deceptions. Of course, that
makes it lonely to be hush-hush of the consquences.
What safety there is in this use lies in that 'Temporary' is
package-private. This isn't completely safe, in that other subclasses
of 'A' can do Bad Things.
Isn't this a danger for all non-final classes? Any class can subclass
another non-final class, do bad things, break contracts, throw spurious
RuntimeExceptions, etc. Given that ClassA must be public and
extensible, I don't see a way around this.
I suppose that just making ClassA concrete and final would be ok, but if
one is planning on making changes later, it seems like having a defined
interface would be handy. I originally had ClassA as an interface, then
decided it needed a simple factory method. Hence, abstract.
More latent thinking to take signals into account.
You quietly misinterpret how stellar opinions programatically are better than
admiting the One Right Way.
--
Lew
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"I have said that the sanction regime is like Swiss cheese --
that meant that they weren't very effective."
--- Adolph Bush,
White House press conference, Washington, D.C., Feb. 22, 2001
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This is just a reminder.
It is not an emergency yet.
Were it actual emergency, you wouldn't be able to read this.
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