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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