I don't know much about CAL ... could this kind of thing be accomplished by
extending the ComponentClassEnhancementWorker chain of command? Or is CAL
based on the raw Javassist APIs?
On 9/12/07, Tom Davies <[EMAIL PROTECTED]> wrote:
>
>
> On 13/09/2007, at 12:00 AM, Howard Lewis Ship wrote:
>
> > I'd love to know why you want to do this ... it indicates to me
> > that there
> > needs to be some additional configuration available to CIS to
> > support your
> > needs.
> >
>
> I don't know if I have a valid use-case, but what I'm doing is
> experimenting with integrating Business Object's CAL language with
> Java, so a page class from the tutorial app becomes:
>
> @Cal(workspace = "myworkspace.cws", module = "TDavies.Start")
> public class Guess {
> @Persist
> private int _target;
>
> void setup(int target)
> {
> _target = target;
> }
>
> public int getTarget()
> {
> return _target;
> }
>
> private int _guess;
>
> public int getGuess()
> {
> return _guess;
> }
>
> public void setGuess(int guess)
> {
> _guess = guess;
> }
>
> @Persist
> private String _message;
>
> public String getMessage()
> {
> return _message;
> }
>
> String onActionFromLink(int guess)
> {
> _message = getNewMessage(guess, _target);
> MaybeValue<String> nextPage = getNextPage(guess,_target);
> return nextPage.getValueField();
> }
>
> @Cal
> String getNewMessage(int guess, int target)
> {
> return null;
> }
> @Cal
> MaybeValue<String> getNextPage(int guess, int target)
> {
> return null;
> }
> }
>
> Where the methods with the @Cal annotations are replaced by Javassist
> with calls to CAL functions. I'm not even sure this is useful yet --
> I'm just exploring.
>
> To do this I needed to be able to apply a Javassist Translator to the
> page classes as they were loaded (and javassist.Loader.addTranslator
> should be named *setTranslator*!)
>
> Perhaps there is a better way?
>
> In any case, ComponentInstantiatorSourceImpl is quite monolithic --
> perhaps some of its components should be injected, e.g. a seperate
> Translator, rather than having ComponentInstantiatorSourceImpl
> implement Translator.
>
> Tom
>
>
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--
Howard M. Lewis Ship
Partner and Senior Architect at Feature50
Creator Apache Tapestry and Apache HiveMind
