Re: [picocontainer-dev] Exception as message passing in ConstantParameter

>> or a core code-path.  Maybe not now, but verify(..) could
>> return
>> something more sophisticated than void.
>
> AFAIR, using exceptions to signal outcomes is considered
> antipattern.  But it would be difficult to produce meaningful error  
> message outside of parameters otherwise.


We could use a callback. Such that ..

     void verify(PicoContainer container, Co ... etc

.. would become ..

     Verification verify(PicoContainer container, Co ... etc

     public class Verified implements Verification {
     }
     public abstract class NotVerified implements Verification {
        public abstract void throwCause();
     }

It implies that if you have verification exceptions, you throw then  
via callback impl of NotVerified

It also implies some if/else checking in various bits of the verify  
hierarchy

- Paul

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