RE: [MO-java-dev] Understanding alt.java.io?

[Tim M. <tim...@po...>]

Jeff - yep, you've answered the question.

I think my problem was, that by implementing the entire interface - it looks
too close (I didn't spot the getRealFile method). Which while technically
correct - can cause lots of confusion - the type inconsistency being the
main one (I curse sun over and over for this mess!)

For very low file stuff - I guess you may need all the methods, so your
implementation would prove useful. Do you think there is a use for
"SimpleXXXX" implementations that just leave most of the low level stuff
that most people don't use anyway? I'm of two minds on this...

By the way - this kind of decision I would agree would benefit from Java Doc
:-)

Tim

-----Original Message-----
From: moc...@li...
[mailto:moc...@li...]On Behalf Of
Jeff Martin
Sent: 23 August 2002 15:56
To: MockObjects
Subject: Re: [MO-java-dev] Understanding alt.java.io?


public java.io.File alt.java.io.File.getRealFile();

Was that the question?

On Fri, 2002-08-23 at 00:22, Tim Mackinnon wrote:
> Guys - I don't understand how alt.java.io.File (the interface that sun
> should have used in the first place) helps us mock stuff up?
>
> I must be missing something very obvious - but if I have a MockFile that
> conforms to that interface, I can't use it with Sun's FileReader object
> which expects a java.io.File (there is a basic type difference problem
> here).
>
> So I guess I don't understand the point of it??? At connextra we have
> subclassed things like java.io.Reader (as we did for some of the other io
> classes - some of which live in the orginial mockobjects code base), and
> have implemented the crucial methods that get it to work as a stub and a
> mock. This way a MockReader can be used with a BufferedReader and you can
> write relevent tests with it.
>
> For trickier classes like File - which really seem to require
fileDescriptor
> objects we have adopted the "SimpleFile" convention, which just wraps File
> and just delegates a subset of the most useful methods. This interface
also
> provides  getFile, so that if you do use it at a low level in your code
you
> can get the File object and pass it to something like an XML Document
class
> (although we tend to use a MockReader in preference to the real file
> anyway).
>
> Is alt.java.io.File an equivalent to the SimpleFile strategy? It doesn't
> seem to be to me - so I am scratching my head trying to understand how its
> being used in production code at the moment?
>
> With regards to some of this stuff, I promise to reintegrate asap to pass
on
> some of the stuff we have lurking around. Its taken us a long time to get
> off visualAge so we can more easily work on open source projects (we are
> almost there).
>
> Tim
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jeff martin
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