[picocontainer-dev] Providers

Folks,

My Guice buddies are divided on whether their providers feature is  
mainstream or niche.  It allows you to have a factory that can help  
make deps on a just in time basis (for the particular scope) for other  
components to use.

The interface goes like so :

    interface Provider<T> {\
          T get();
    }

For Pico, as of a commit yesterday, we have a provider too.  It's a  
little different. It's less generic than the Guice one :

   interface Provider {
   }

It's a convention idiom. Have one method provide that returns the type  
you're interested in providing, but have as many concrete arguments  
for that method as you require. As long as those deps can be satisfied  
by the PicoContainer instance that is managing it, then it'll be fine.

Have a look at Chocolatier and Chocolatier2 in http://svn.codehaus.org/picocontainer/java/2.x/trunk/pico/container/src/test/org/picocontainer/injectors/ProviderTestCase.java
(yes there are two ways of working with Providers).

Thoughts?

Regards,

- Paul


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