Re: [Springframework-developer] How hard is is to add support for list inside of a list, in an XML beanfactory def?

[Colin S. <col...@ex...>]

W/regards to doing proper method matching based on argument types in 
MethodInvokingFactoryBean, there are a few different levels it can be 
taken to. The current code is pretty dumb, it uses reflection to try to 
find a target method with the exact same argument types as the supplied 
arguments. This won't even work for calling methods which take arguments 
which are superclasses of the specified arguments. What would be pretty 
easy to do is to rip out the MethodUtils class from Apache BeanUtils, 
which can do proper method matching via a method called 
getMatchingAccessibleMethod(). The main downside to this is that 
MethodUtils compiles to about 7.5k of bytecode. This could probably be 
whittled down to about 5k by stripping out some items, but still, it 
would increase the base bean handling code by that amount. The third 
level would be to do coercion on the level of List -> Array, etc.

I don't think the latter is worth it, but I am wondering about the 2nd...


Rod Johnson wrote:

>This is excellent. We had a question about this on the forums recently. It's
>pretty powerful to be able to do arbitrary nesting.
>
>Regards,
>Rod
>
>----- Original Message ----- 
>From: "jürgen höller [werk3AT]" <jue...@we...>
>To: <spr...@li...>
>Sent: Wednesday, November 26, 2003 4:37 PM
>Subject: RE: [Springframework-developer] How hard is is to add support for
>list inside of a list, in an XML beanfactory def?
>
>
>This is actually pretty simple: We just need to allow for <list> (and <map>)
>as sub-element of <list> in the DTD - the bean factory can already handle
>any kind of nested element! I've just patched the DTD accordingly and
>committed it; a corresponding unit test passes (not committed yet due to
>other work).
>
>Juergen
>
>
>-----Original Message-----
>From: spr...@li...
>[mailto:spr...@li...]On Behalf
>Of Colin Sampaleanu
>Sent: Wednesday, November 26, 2003 5:15 PM
>To: spr...@li...
>Subject: [Springframework-developer] How hard is is to add support for
>list inside of a list, in an XML beanfactory def?
>
>
>Right now in a bean factory xml definition, a list can not contain a
>list. Can somebody who is more familiar with the bean wrapping estimate
>how big a deal this would be to add?
>
>The issue comes in using the MethodInvokingFactoryBean to invoke a
>method which takes an array or list as an argument. Right now there is
>no way to do it unfortunately.
>  
>