[jira] [Created] (FELIX-5254) Improve structure of permutations to use unmodifiable capability lists

["Thomas Watson (JIRA)" <ji...@apache.org>]

Thomas Watson created FELIX-5254:
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             Summary: Improve structure of permutations to use unmodifiable capability lists
                 Key: FELIX-5254
                 URL: https://issues.apache.org/jira/browse/FELIX-5254
             Project: Felix
          Issue Type: Bug
          Components: Resolver
    Affects Versions: resolver-1.8.0
         Environment: All
            Reporter: Thomas Watson


As discussed on the felix dev mailing list:

Implement a capability selection collection that
points to a constant list of capabilities and has an index to the currently
selected candidate for that permutation.  That way there is no copying of
the constant list, instead we have a super lightweight collection that
points to the unmodifiable list of capabilities and just has an index.
Changing a Permutation would only involve incrementing that index instead
of removing from a copy on write list.  We can then get rid of duplicate
capability lists since the list is unmodifiable it can be shared with
multiple selection index lists.



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