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Subject: [jira] [Commented] (LANG-1266) Add alphabet converter
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    [ https://issues.apache.org/jira/browse/LANG-1266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15486640#comment-15486640 ] 

ASF GitHub Bot commented on LANG-1266:
--------------------------------------

Github user coveralls commented on the issue:

    https://github.com/apache/commons-lang/pull/188
  
    
    [![Coverage Status](https://coveralls.io/builds/7858389/badge)](https://coveralls.io/builds/7858389)
    
    Coverage decreased (-0.02%) to 93.559% when pulling **c1a5a638a3132f2048bb4113181460c3c660c2a8 on eyala:LANG-1266** into **dad86bc0a29689fd29bf03b382a39621718e8b05 on apache:master**.



> Add alphabet converter
> ----------------------
>
>                 Key: LANG-1266
>                 URL: https://issues.apache.org/jira/browse/LANG-1266
>             Project: Commons Lang
>          Issue Type: New Feature
>          Components: lang.text.*
>            Reporter: Eyal Allweil
>
> (as described in [the mailing list|http://mail-archives.apache.org/mod_mbox/commons-dev/201609.mbox/%3c289983494.3057706.1472720010277@mail.yahoo.com%3e])
> This is a utility class I wrote for converting from one alphabet to another - for example, from unicode to latin, without using some of the chars in latin. The usage looks like this:
> {code}
> Set<Character> originals; // a, b, c, d
> Set<Character> encoding; // 0, 1, d
> Set<Character> doNotEncode; // d
> AlphabetConverter ac = AlphabetConverter.createConverter(originals, encoding, doNotEncode);
> ac.encode("a"); // 00
> ac.encode("b"); // 01
> ac.encode("c"); // 0d
> ac.encode("d"); // d
> ac.encode("abcd"); // 00010dd
> {code}
> Of course, x.equals(ac.decode(ac.encode(x))) should always be true.
> The implementation provided makes the encodings of fixed length, other than the "do not encode" chars, which remain as they are (length one).
> In addition, in order to make it easier to preserve the encoding scheme, I've added a human-readable toString implementation, and a constructor that can recreate an AlphabetConverter from the encoding map, such that:
> {code}
> AlphabetConverter ac;
> ac.equals(AlphabetConverter.createConverterFromMap(ac.getOriginalToEncoded())); // always should be true
> {code}



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