Registering a custom ISqueezeAdaptor (was: What is a "strategy," and how do I write one?)

[Paul Cantrell <ca...@pobox.com>]

OK, I've managed to register my own CustomSqueezeAdaptor by  
implementing PageAttachListener and using the following code:

     private static boolean squeezerRegistered;

     @InjectObject("service:tapestry.data.DataSqueezer")
     public abstract DataSqueezer getDataSqueezer();

     public void pageAttached(PageEvent event)
         {
         synchronized(InnigBasePage.class)
             {
             if(!squeezerRegistered)
                 {
                 new CustomSqueezeAdaptor().register(getDataSqueezer());
                 squeezerRegistered = true;
                 }
             }
         }

It works, but it's pretty crummy. Surely there is -- or should be --  
a way to do this entirely from my hivemodule.xml?

Cheers,

Paul


On Aug 7, 2005, at 1:16 PM, Norbert Sándor wrote:

> Probably it talks about a data squeezer adaptor.
> You should create a custom squeezer adaptor or eg. make CustomClass  
> implement Serializable.
>
> BR,
> Norbi
>
> ----- Original Message ----- From: "Paul Cantrell"  
> <ca...@pobox.com>
> To: "Tapestry users" <ta...@jakarta.apache.org>
> Sent: Sunday, August 07, 2005 8:09 PM
> Subject: What is a "strategy," and how do I write one?
>
>
>
>> I notice that if I do this...
>>
>>     <a href="#" jwcid="@DirectLink" listener="listener:doStuff"  
>> parameters="ognl:value">
>>
>> ...with this backing code:
>>
>>     public abstract CustomClass getValue();
>>     public void doStuff(CustomClass value) { ... }
>>
>> ...it doesn't work (which I would expect), but I get this error  
>> message:
>>
>>     Could not find a strategy instance for class CustomClass
>>
>> ...which suggests that this *could* work if only I registered a  
>> "strategy" with Tapestry, whatever that means. I looked through  
>> the  docs and a did a quick web search on this, without luck --  
>> though I'm  sure good information is out there somewhere.
>>
>> Anybody on this list know how it's done? I'm using 4.0 beta 3.
>>
>> Cheers,
>>
>> Paul
_________________________________________________________________

"Prediction is hard, especially of the future."  -- Niels Bohr


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