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From "Andrew Rucker Jones (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LANG-1376) Iterable classes derived from Range for incremental types
Date Sat, 20 Jan 2018 21:29:00 GMT
Andrew Rucker Jones created LANG-1376:
-----------------------------------------

             Summary: Iterable classes derived from Range for incremental types
                 Key: LANG-1376
                 URL: https://issues.apache.org/jira/browse/LANG-1376
             Project: Commons Lang
          Issue Type: Improvement
          Components: lang.*
    Affects Versions: 3.7
            Reporter: Andrew Rucker Jones


I have a use case for deriving a class from Range with Integer as its parameter and iterating
over all integers in the range. In fact, in my use case I have a List<Range<Integer>>,
and would love to combine them easily using Commons Collection's LazyIteratorChain to iterate
over all integers in all of the fields. I can't do this because Range is declared final, so
I wrote my own Iterator in a wrapping class. It seems to me, though, that I might not be the
only one who would think it useful to iterate over a Range as long as the Range is a type
that can be incremented.

Perhaps one could derive classes like IntegerRange, ShortRange, and LongRange and possibly
even BigDecimalRange that implement Iterable.

If the project is interested in my suggestion, I would be willing to submit a patch.



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