javax.z Yet Another Collections Library

Godspeed

I have started writing a new collections library based on set theory as per
Spivey's Z notation. I have put the library on SourceForge. It is currently
in its infancy and it will be expanded fairly rapidly.

Let me know if you are interested in getting involved.

To try it out go to: http://sourceforge.net/projects/zedlib

.... or search for project "javax.z"

I have resisted calling it yacl, but maybe that is more appropriate!

Brad.

Oct 17 '06 #1

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2432

Oliver Wong

"Godspeed" <bl******@bigpo nd.net.auwrote in message
news:9l******** ***********@new s-server.bigpond. net.au...

>I have started writing a new collections library based on set theory as per
Spivey's Z notation.

[...]

>
To try it out go to: http://sourceforge.net/projects/zedlib

Maybe you should put a little blurb on the homepage about why people
should prefer your library over Sun's.

- Oliver

Oct 17 '06 #2

Godspeed

Good idea. Just for a teaser...

Sequence extends Function extends Relation extends Set implements
java.util.Set

Bag extends Function ...

IMO, Sun has incorrectly modelled Map (which is equivalent to Spivey's
Function) separate to a Set. However, a Function (Map) is actually a type of
Set. Sun's collections don't have a natural Relation class which is a
mapping of X to Y values, where X can be repeated if it maps to a different
Y (hence, different to Map). A Sun Map should be a type of Relation (IMO)
which I call a Function following Spivey.

I suppose there is a purist reason for using javax.z, and it should make
collections more useful and usable. One major improvement I should make is
to introduce interfaces (they are all classes at the moment). I'll do that
soon.

The ability to use domainRestricti on, rangeRestrictio n, transitiveClosu re,
inverse, relationalCompo sition, relationalOverr ide should prove interesting
and satisfying.

"Oliver Wong" <ow***@castorte ch.comwrote in message
news:6z5Zg.1766 0$P7.1375@edtnp s90...

>
"Godspeed" <bl******@bigpo nd.net.auwrote in message
news:9l******** ***********@new s-server.bigpond. net.au...
>>I have started writing a new collections library based on set theory as
per Spivey's Z notation.
[...]
>>
To try it out go to: http://sourceforge.net/projects/zedlib

Maybe you should put a little blurb on the homepage about why people
should prefer your library over Sun's.

- Oliver

Oct 17 '06 #3

Daniel Dyer

On Tue, 17 Oct 2006 14:59:33 +0100, Godspeed <bl******@bigpo nd.net.au>
wrote:

I have started writing a new collections library based on set theory as
per
Spivey's Z notation. I have put the library on SourceForge. It is
currently
in its infancy and it will be expanded fairly rapidly.

Let me know if you are interested in getting involved.

To try it out go to: http://sourceforge.net/projects/zedlib

I went to have a look at the code but the CVS repository is empty.

It might be worthwhile uploading some Javadoc API documentation so people
can get an idea of how the library fits together without having to
download it first.

Dan.

--
Daniel Dyer
http://www.uncommons.org

Oct 17 '06 #4

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