Stream interfaces
Dave Harris
brangdon at cix.co.uk
Thu Mar 1 05:16:00 EST 2001
tgagne at ix.netcom.com (Thomas Gagne) wrote (abridged):
> ExternalStream
> BufferedExternalStream
> ExternalReadStream
> ExternalReadWriteStream
> ExternalWriteStream
> InternalStream
> WriteStream
> ReadWriteStream
Do you agree this hierarchy is a bit duff? Notice how "Write" appears in
3 leaf classes: ExternalReadWriteStream, ExternalWriteStream,
ReadWriteStream. These apparently share no implementation or interface.
Notice also that in one place we get a trio of classes:
> ExternalReadStream
> ExternalReadWriteStream
> ExternalWriteStream
and in another we get a pair:
> WriteStream
> ReadWriteStream
yet they would seem to be doing the same kind of thing. How do I get an
internal stream which is readable but not writable? If ReadWriteStream
inherits from WriteStream, why doesn't ExternalReadWriteStream inherit
from ExternalWriteStream?
Something has gone wrong here.
Dave Harris, Nottingham, UK | "Weave a circle round him thrice,
brangdon at cix.co.uk | And close your eyes with holy dread,
| For he on honey dew hath fed
http://www.bhresearch.co.uk/ | And drunk the milk of Paradise."
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