[Jython-dev] The future of CollectionProxy

[<bc...@wo...>]

Hi,

With the introduction of iterators, there is no longer a driving need to
have a collection proxy for each PyInstance. We could instead have a
static collection of the (5 to 7) different supported CollectionProxies,
and the right CollectionProxy is found whenever the __len__ and
__XXXitem__ methods is called.

Pros:
- We will save a pointer for each instance of PyInstance and
  PyJavaInstance and an instance of a CollectionProxy for each Vector,
  Hashtable, Map, etc.

Cons:
- A serie of instanceof operations is necessary every time one of
  the sequence method is called on a java instance.
- It would not be possible to index a java.util.Enumerations and a 
  java.util.Iterator (but will still be possible to iterator over them).

Any thoughs?

regards,
finn