I believe Jesse did considerable work to OGNL (to speed it up, using
bytecode manipulation) between the two releases.
The conflict between two overloadings of getMessage() is a problem.
OGNL simply doesn't have syntax to let you select which of the two you
want to invoke, and it looks like its invoking the "wrong" one.
I would change the name of the new method, say to "retrieveMessage()"
or "resolveMessage()".
On Mon, Apr 27, 2009 at 9:03 AM, <howard.kel...@algorithmics.com> wrote:
> Hi
>
> I’m trying to upgrade from tapestry 4.0.2 to 4.1.6 and am seeing some strange
> behaviour.
>
> Basically we have our own implementation of org.apache.hivemind.Messages
> which extends org.apache.hivemind.impl.AbstractMessages now in our
> implementation we have a method called
> getMessage(org.springframework.context.MessageSourceResolvable key) and in
> our tapestry pages we’re using
> ognl:messages.getMessage(request.getAttribute(‘message’)) which worked fine
> in 4.0.2 because ognl called the
> .apache.hivemind.impl.AbstractMessages.getMessage(String key) which is what
> we want but in 4.1.6 it’s trying to convert the String
> ‘welcome.problem.session.expired’ into
> org.springframework.context.MessageSourceResolvable. I guess because it’s
> trying to call getMessage(org.springframework.context.MessageSourceResolvable
> key) in our implementation.
>
> I also have the same problem with a component of ours that has a parameter
> named key to which we pass in ‘literal:welcome.username’ and in the component
> we call messages.getMessage(key) which results in the same error. ‘Unable to
> read OGNL expression: Unable to convert type java.lang.String of
> welcome.username to type of
> org.springframework.context.MessageSourceResolvable’. I’m a little confused
> as to why it doesn’t call the correct method with the String parameter.
>
> However if I call messages.getMessage(‘welcome.username’) hard coding the
> msgkey it works fine.
>
> Does that mean that in the new ognl/tapestry implementation we cannot pass a
> component parameter/object(which is String) to an overloaded method?
>
> Any advice on how to rectify this would be greatly appreciated.
>
> Regards
>
> Howard Kelsey
>
>
>
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--
Howard M. Lewis Ship
Creator of Apache Tapestry
Director of Open Source Technology at Formos
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