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From Simone Tripodi <>
Subject Re: [LANG] Add alphabet conversion API
Date Thu, 01 Sep 2016 09:26:01 GMT
I personally think it would a very "nice to have" feature, I had to face
similar issues in the past and, if that feature was available would have
saved me developing time.

I just have a small request/suggestion: since int/char can be casted to
each other, I would use BitSets rather than Sets.

Good luck!

On Thu, Sep 1, 2016 at 10:53 AM, Eyal Allweil <> wrote:

> Hi guys,
> Would you be interested in adding a utility class that creates alphabet
> converters, perhaps using a helper method available from StringUtils? It
> doesn't have to stay the way it is now, but the API for the class -
> AlphabetConverter - is currently:
> /** * The input is integers representing code points, but we can make it
> accept chars as well * * doNotEncode represents chars we want to leave in
> the original state (not to encode them using the chars in encoding) */
> public AlphabetConverter(Set<Integer> original, Set<Integer> encoding,
> Set<Integer> doNotEncode);
> public String encode (String original);
> public String decode (String encoded);
> In StringUtils, we could add
> public AlphabetConverter getAlphabetConverter (Set<Integer> original,
> Set<Integer> encoding, Set<Integer> doNotEncode);
> I used it to convert from unicode to latin letters, without using any
> chars I wanted as delimiters, and preserving the English alphabet as is for
> readability. If you'd like to add it, I'll clean up the code and prepare it
> for a pull request so you can review it.
> It makes sense to me to add a method that returns the HashMaps used
> internally for the mappings so they can be serialized (and deserialized)
> for preserving the mapping.
> Regards,Eyal Allweil (PayPal)

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