Comments on: Javassist and Annotations for Interfacing Java to CAL

By: Utiniabitrace

Utiniabitrace — Wed, 07 Jan 2009 12:50:06 +0000

What is bumburbia?

By: Tom Davies

Tom Davies — Tue, 25 Sep 2007 03:12:15 +0000

Good point -- if the class is abstract it must be instantiated reflectively, which works when you use a class as a Tapestry page, but not in the example I gave -- that would require a concrete class with a dummy body.

Here's an example of specifying an output policy:

@Cal(outputPolicy=ITERATOR) protected abstract Iterator randomList();

Policy annotations could also be put on fields, to apply when they are passed to/returned from functions, and on parameters, but I haven't done that yet.

By: Andrew

Andrew — Mon, 24 Sep 2007 23:27:34 +0000

As I mentioned before, this is very cool. I like how it is possible to have multiple return values.

One thing that I noticed, though, is that CALWordCounter.addWord is abstract. How is this class instantiated?

Also, how are input and output policies used? It seems like it wouldn't be too hard to specify them as fields in the annotation.