RE: [jgrapht-developers] 0.7.0

[Hartmut B. <Har...@gm...>]

About the state of the generics in the branch ivins_Generics_Pre0_7_0:

I have successfully removed quite a number of warnings relating to the
generics. Alas, there is still a lot of complaining from the compiler and
some seem to point to underlying problems of the package.

Changes introduced in the branch:
- org._3pq.jgrapht.DirEdge: Interface for directed edges
- a small number of JUnit tests


Things I think should happen for 0.7.0
======================================
- Rename edge.DirectedEdge to edge.DefaultDirectedEdge
- Rename DirectedWhightedEdge to DefaultDirectedWhightedEdge
- etc.
- Lots of places still with warnings
- Lots of "COMMENT ME" places asking for comments (with and without this
  string)
- Lots of JUnit test


Things I have problems with
==================
- EdgeFactories are tricky with generics,
  and more so in the context of sub-classes of graph and the default
  constructor. The warnings are in the Default*Graph classes.
As of now, I have not been able to declare and assign an edge factory to a
graph without a compiler warning. The reason, I think, is that the types of
generics are tested (and only testable) at compile time.
Any suggestions and help are welcome.

  A more serious problem occurs with sub-classing and the default
constructor: When you use or sub-class a graph using generics specifying
that you have edges of type EEEE and forget to feed it with the correct
EdgeFactory for EEEE you will get a runtime-error. John suggested we might
need to remove the default constructor entirely.

- Heaps - I don't understand sufficiently what is going on in there in order
to get it watertight with generics/type-safety. Maybe Michael can have a
look and help.


There a probably quite a number of other things I can't remember right now
(just back from a long vacation).
In the immediate future (4-6 weeks) I will not be able to do a lot of
programming with generics. Everyone feel free to update the branch whenever
you like.


Hartmut