[Clirr-devel] maven plugin is working now

[<lak...@t-...>]

Hi guys,

I finally had the time to dig into Vincent's ClassCastException, it was 
a problem in InterfaceSetCheck where we added Strings to a Set and then 
expected it to contain JavaClass objects.

I have also made a small change in the plugin code to ensure that the 
baseline jar is downloaded only once, not every time the clirr goal is 
running.

After adding <versions> to the POM I was able to run "maven clirr" 
without any problems on commons-collections. Vincent, could you please 
retest with Cactus?

Open issues I see with the Maven plugin:

    * dependencies are not considered (<[new/old]ClassPath> subelements
      of the clirr Ant task), I don't know how things work out in the
      plugin if 3rd party classes appear in method signatures of the
      code clirr wants to check.
    * clirr:check calls jar:jar. In typical use cases (like adding clirr
      as a pregoal for jar:install) that will run jar:jar twice.

Cheers,
Lars