Re: Composition vs. Inheritance

On 2007 Feb 27, at 8:47 AM, Seth Gordon indited:

> Robbert Haarman wrote:
>> So, a better solution would have been to implement just the basic
>> operations (e.g. add) as part of the class definition, and the higher
>> level operations in terms of the basic ones. That way, it would have
>> been clear that you need have overridden only add.
>
> But what if you have a more efficient way of implementing #addAll than
> simply iterating through the members of the collection being added?

It sounds like the contract/interface/encapsulation boundaries have  
not been defined very well?

--Doug