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From Mats Norén <m...@alma.nu>
Subject Re: continuation fear (was Re: [status & RT] design challenges)
Date Thu, 11 Apr 2002 18:19:16 GMT
Nice!!
Another stupid question. How do I connect to other business objects and not
just the sitemap?
Can I call Java-functions for handling dbs and such from within the
flowcontroller?

/Mats

----- Original Message -----
From: "Ovidiu Predescu" <ovidiu@cup.hp.com>
To: "Mats Norén" <mats@alma.nu>
Cc: <cocoon-dev@xml.apache.org>
Sent: Thursday, April 11, 2002 8:03 PM
Subject: Re: continuation fear (was Re: [status & RT] design challenges)


> On Thu, 11 Apr 2002 15:03:14 +0200, Mats Norén <mats@alma.nu> wrote:
>
> > Can I use recursion with the flow controller?
> >
> > For instance (incorrect syntax):
> >
> > function getSearchCriteria(a, b, c) {
> >      var URI = "showthreedropdowns_uri"
> >      Array result = {a, b, c}
> >      if (c == "") {
> >           sendPage(URI, a, b, c);
> >           result = getSearchCriteria(from_response_a,
> > from_response_b,from_response_c)
> >      }
> >      return result;
> > }
> >
> > getSearchCriteria("*", "", "");
> >
> > The idea is that the parameters are used in a pipeline which display a
form
> > with the dropdowns A, B, C.
> > The option values are gathered from a database query with the parameters
a,
> > b, c.
> > B depends on A, C depends on B.
> > The initial values means that only A will be populated.
> > When a selection is made in A a javascript posts the values back, B will
be
> > populated and C will remain empty.
> > When a seletion is made in B, C will be populated and the innermost
> > getSearchCriteria will return and then the second and then the first,
> > hopefully containing three values for the criteria.
> > Is this possible?
>
> Yes, it is possible!
>
> There's one change you'd need to do in the sample above is to put the
> last line inside a function:
>
> function showTree()
> {
>   getSearchCriteria("*", "", "");
> }
>
> You would then add an entry in the sitemap to call this function:
>
>   <map:match pattern="...">
>     <map:call function="showTree"/>
>   </map:match>
>
> This provides the entry point in your application.
>
> Also to pass the business data to the URI, you'd need to put all of it
> in a single object, so it can be accessed from the page. I think a
> dictionary would be the best thing, as you can retrieve from it using
> simple XPath expressions. So the above sendPage line would look like
>
>   sendPage(URI, {"a" : a, "b" : b, "c" : c});
>
> In your XSP you'd access the values of a, b or c using:
>
>   <jpath:value-of select="a"/>
>
> and so on.
>
> Hope this helps.
>
> Regards,
> --
> Ovidiu Predescu <ovidiu@cup.hp.com>
> http://www.geocities.com/SiliconValley/Monitor/7464/ (GNU, Emacs, other
stuff)
>
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