Re: [picocontainer-dev] Specify a zero arg constructor?

--- Michael Rimov <[email protected]> wrote:

> Hi All,
> 
> I've got an issue with the following code:
> 
>         MutablePicoContainer pico = new
> DefaultPicoContainer();
>         pico.addComponent(ArrayList.class,
> ArrayList.class);
>         pico.addComponent(HashSet.class);
>        
> assertNotNull(pico.getComponent(ArrayList.class)); 
> //Error!
> 
> The following claims a circular dependency
> exception... simple enough....
> because ArrayList can have a ArrayList(Collection)
> constructor.
> 
> Great.... now how can we specify the simple:  new
> ArrayList() no arg
> constructor?
> 
> In the past, we could:
> 
>         pico.addComponent(ArrayList.class,
> ArrayList.class, new Parameter[0]{});
> 
> But that doesn't appear to be working. (I assume
> because of the variable arg
> constructors, it becomes impossible to tell if there
> was no parameter passed in,
> or an empty array)

Well, that was area of my refactoring attempts ;)
Look at the statics - there was Parameter.EMPTY
or ComponentParameter.EMPTY

Vararg constructor is pretty different from default - 
it accepts array of something. 

regards,

----[ Konstantin Pribluda http://www.pribluda.de ]----------------
JTec quality components: http://www.pribluda.de/projects/


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