Re: using EnhancementWorkers for Specification Inheritance

[Raul Cesar Teixeira <ra...@gmail.com>]

Mark,

Did your enhancement worker finally work? I tried to implement your
solution to the same problem I am having, but still no dice. I keep
getting an error saying "Parameter location must not be null."
How are you creating your ASO? I'm trying to create mine like this:

        <contribution configuration-id="tapestry.state.ApplicationObjects">
		<state-object name="aso" scope="session">
			<create-instance  class="xyz.AsoClass" />
		</state-object>
	</contribution>

Any help would be great! I'm stuck on this for 3 days now!!!

On 4/10/06, Mark Lehmacher <ma...@gmx.de> wrote:
>
> For future reference: Solved my problem by simply contributing my
> enhancement worker with before="tapestry.enhance.inject-specification"
> instead of before="tapestry.enhance.abstract-property"!
>
> > --- Ursprüngliche Nachricht ---
> > Von: "Mark Lehmacher" <ma...@gmail.com>
> > An: tapestry-user@jakarta.apache.org
> > Betreff: using EnhancementWorkers for Specification Inheritance
> > Datum: Tue, 4 Apr 2006 12:59:36 +0200
> >
> > Hello,
> >
> > I am using JDK1.4 and for that reason can not use the annotations.
> > However,
> > I would still like be able to provide for "specification inheritance",
> > i.e.
> > getting my ASO injected to all classes which derive from my BasePage
> > without
> > having to specify an inject declaration in each of my page xml specs. I
> > thought I could do that by using EnhancementWorkers but I still end up
> > getting a NPE when accessing my  allegedly inserted ASO. My
> > EnhancementWorker impl looks as follows:
> >
> >     public void performEnhancement(EnhancementOperation op,
> > IComponentSpecification spec) {
> >
> >         if (op.implementsInterface(BasePage.class)) {
> >
> >             // xml fragment:  <inject property="aso" type="state"
> > object="aso"/>
> >
> >             InjectSpecification asoInjSpec = new
> > InjectSpecificationImpl();
> >             asoInjSpec.setType("state");
> >             asoInjSpec.setProperty("aso");
> >             asoInjSpec.setObject("aso");
> >
> >             spec.addInjectSpecification (asoInjSpec);
> >         }
> > }
> >
> >
> >
> > where BasePage.class is the class of the base page for all my pages. My
> > hivemind contribution looks as follows:
> >
> >     <contribution configuration-id="tapestry.enhance.EnhancementWorkers">
> >         <command id="enhance-basePage-worker"
> >                 object="service:BasePageEnhancementWorker"
> >                 before="tapestry.enhance.abstract-property" />
> >     </contribution>
> >
> >     <service-point id="BasePageEnhancementWorker"
> >         interface="org.apache.tapestry.enhance.EnhancementWorker">
> >         <invoke-factory>
> >             <construct
> >                 class="mailadm.web.enhance.BasePageEnhancementWorker">
> >             </construct>
> >         </invoke-factory>
> >     </service-point>
> >
> > When I add debug statements to my EnhancementWorker I see it gets executed
> > just fine. Moreover I added debug statements to
> > org.apache.tapestry.enhance.InjectStateWorker and it works on my aso
> > inject
> > spec. However, the funny thing is that when using a state inject spec from
> > my xml page spec, the InjectStateWorker logs two invocations for one
> > injection, whereas for my EnhancementWorker only one invocation is logged
> > and I end up with a non-working injection (i.e. the NPE when trying to
> > access the injected property).
> >
> > Any help would be greatly appreciated. Thanks!
> >
>
> --
> "Feel free" - 10 GB Mailbox, 100 FreeSMS/Monat ...
> Jetzt GMX TopMail testen: http://www.gmx.net/de/go/topmail
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: tapestry-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: tapestry-user-help@jakarta.apache.org
>
>

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tapestry.apache.org
For additional commands, e-mail: users-help@tapestry.apache.org