[picocontainer-dev] Pico2: AdaptiveBehaviorFactory - new class.

Erik mentions that DPC's default of Caching & CDI is not necessarily  
the best situation. And that the ctors for DPC that don't contain a  
ComponentFactory (formerly CAF) should perhaps be deleted.

Is AdaptiveBehaviorFactory a better default though ?

If used, it would mean that Caching is no longer default behavior for  
DPC and that Field-Annotation, Method-Annotation as well as CDI would  
be casually supported.

It will still be possible to specify chains of ComponentFactories as  
it has been in the past, this is a new one, not one that replaces  
others.

AdaptiveBehaviorFactory can recognize Caching, Implementation Hiding  
and Syncronized (thread safe) behavior via characteristics:

    MPC mpc = new DPC();
    mpc.as(CACHE, HIDE, THREAD_SAFE).addComponent(Map.class,  
HashMap.class);

    mpc.as(SINGLE).addComponent(Map.class, HashMap.class);  //  
alternative to CACHE for just single-instance (or what Guice calls  
singleton)

Characteristics of course are optional.  I've upgraded DPC to barf is  
a characterization is set, but not processed during addComponent 
(..).  Meaning its fail-fast for errors in setup.

Thoughts?

- Paul

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