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i : 12 September 2009 • 1:30AM -0400

[jira] Created: (COLLECTIONS-333) Generic versions of Transformed* classes
by Matt Benson (JIRA)


Generic versions of Transformed* classes

                 Key: COLLECTIONS-333
             Project: Commons Collections
          Issue Type: Improvement
          Components: Bag, Collection, List, Set
    Affects Versions: Generics
         Environment: OS X
            Reporter: Edwin Tellman
            Assignee: Stephen Kestle
            Priority: Minor
             Fix For: Generics

I added generics to some more classes and fixed some compilation problems.

The generic version of Transformer required the input and output types to be identical.  This seemed to me to reduce the usefulness of transformed collections, as transforming one type into another seems like it would be a fairly common operation.  I'm not sure how to fix this, however, as it also doesn't seem feasible to have a generic TransformedCollection with different input and output types that implements Collection<E>.  Anyway, this patch de-generifies TransformedCollection, which also fixes some compilation problems.  Please disregard this change if you disagree and have a better solution.

The modified collection classes are:

Bags: PredicatedSortedBag, AbstractBagDecorator, SynchronizedBag, UnmodifiableSortedBag, SynchronizedSortedBag, PredicatedBag
Lists: PredicatedList, SynchronizedList
Sets: PredicatedSortedSet, SynchronizedSortedSet, PredicatedSet, UnmodifiableSortedSet, SynchronizedSet
Miscellaneous: PredicatedBuffer

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