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From Henri Yandell <>
Subject Translators and Range [Was: [VOTE] Release Commons Lang 3.0 (RC1)]
Date Thu, 07 Apr 2011 21:55:29 GMT
On Mon, Mar 7, 2011 at 10:05 PM, Henri Yandell <> wrote:
> On Sat, Mar 5, 2011 at 8:46 AM, Oliver Heger
> <> wrote:
>> Two minor points from my side:
>> - Just a proposal: There are some translators in the new translate package
>> which can be configured with a range of the codes to be processed. Would it
>> make sense to use the Range class for this purpose? Then configuration could
>> be more flexible (because multiple ranges could be specified), and there
>> would probably be less duplicate code for checking the ranges.
> Very interesting.
> Also makes me wonder if Range should support the notion of
> Range.above, Range.below and Range.outside in addition to
> Range.between and That change the API from:
>  UnicodeEscaper.between(x, y)
> to:
>  new UnicodeEscaper(Range.between(x,y))
>  new UnicodeEscaper(Range.above(y))
>  new UnicodeEscaper(Range.below(x))
>  new UnicodeEscaper(Range.outsideOf(x,y))
> For the translators; sounds great. I'm trying to remember if I hit
> problems introducing the feature of either an open-ended Range, or an
> inverted Range. Looking at LANG-551, it looks like I tried to
> introduce the inverted Range notion (outsideOf) so that I could merge
> in CharRange, and it never really worked.
> Worth trying again I think.

I've begun by implementing the code in the translators as a new
CodepointRange. Stunningly (actually I was a bit surprised) I've
rewritten CharRange :) So at a minimum I think:

a) CharRange should be updated for codepoints.
b) Translators should use CharRange.

I also tried to update Range to support the necessary features, and
the two APIs don't fit too well together. I'm going to go ahead and do
a) and b); then ponder the CharRange into Range question again.


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