You're right about the number of methods in IDirect, sorry I forgot to
clarify that. I guess all of the places I am doing this, the class
implementing IDirect is an abstract Tapestry page or component. This
way Tapestry fills in all the details on those other methods and all I
need to implement is trigger().
I'm not sure how else to do it, unfortunately. If you're generating
the link in a page or component it's not too difficult, and I suppose
even if you aren't, you can always retrieve a page/component that
implements IDirect from the request cycle for that first parameter.
On Tue, Mar 18, 2008 at 11:16 AM, Petri Wessman <[EMAIL PROTECTED]> wrote:
> Ben Dotte wrote:
> > Hi Petri,
> >
> > To generate a DirectLink href programmatically, you'll need a class
> > that implements IDirect. In the trigger() method on that, you can call
> > the intended listener. Refer to an instance of the class implementing
> > IDirect for the first parameter of DirectServiceParameter, set the
> > Direct engine service on it (@InjectObject("engine-service:direct") or
> > with a setter for a regular service), and create the href portion like
> > this:
> >
> > public String getDirectHref()
> > {
> > Object[] params = new Object[] { param1, param2, etc };
> > DirectServiceParameter dsParam = new DirectServiceParameter(this,
> params);
> > ILink link = directService.getLink(false, dsParam);
> > return link.getURL();
> > }
> >
> > HTH
> > Ben
>
> Thanks, that looks exactly what I'm looking for! I noticed DirectService
> in the API docs, but could not figure out quite how it should be used.
>
> One additional question, though: what's the smartest way to get a class
> that implements IDirect? That interface by itself requires that you
> implement a metric ton of methods, so I'm thinking there must be a
> smarter way.
>
> I tried
>
> public class TestDirectLink extends AbstractComponent implements IDirect
>
> and them implemented the few methods required by AbstractComponent and
> the IDynamicInvoker & IDirect interfaces, but I'm unsure of how to
> instantiate the class that so it can be used for creating the link.
>
> If I just create it as a POJO, I get a Tapestry exception when I try to
> use it:
>
> Exception: [EMAIL PROTECTED] container is null.
>
> So I probably need to attach it to the current page (or something)? Or
> is AbstractComponent the wrong way to proceed, here?
>
> //Petri
>
>
>
>
> > On Tue, Mar 18, 2008 at 8:45 AM, Petri Wessman <[EMAIL PROTECTED]> wrote:
> >> Hello all, I have a new question. I'd need to generate a
> >> DirectLink-style link from inside Java code (render method); in other
> >> words, generate HTML that would duplicate the effect of this:
> >>
> >> <a jwcid="@DirectLink" listener="listener:someAction"
> >> parameters="ognl:someId">link text</a>
> >>
> >> from a Java code method which has access to a IMarkupWriter object (and
> >> the IPage, if needed).
> >>
> >> Any tips on how to do this? I tried browsing the DirectLink.java source,
> >> but the N levels of abstraction there mostly just gave me a headache :}.
> >>
> >> The reason I need to do this is: I need to generate a listing of
> >> "events" for a system. Some of those events will contain various system
> >> object IDs, and I need to make those IDs into links that will point to
> >> detail on the specific ID. There may be more than one link per line, or
> >> none.
> >>
> >> So I'd have stuff like:
> >>
> >> * something happened
> >> * something else happened to item XXX
> >> * used requested item XXX to me merged with other type of item YYY
> >>
> >> and I'd like to make those XXX and YYY parts into links that would lead
> >> to a detail page on the given system object. The actual text is
> >> localized (comes from page.getMessages()).
> >>
> >> The only way I've figured to do this is to use a @Delegator object and
> >> roll up my own renderer for the item line HTML.. but now I'm stumped at
> >> the "how do I generate a Tapestry link from within code" step.
> >>
> >> All help and pointers much appreciated :}
> >>
> >> //Petri
> >>
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