[jira] [Commented] (LANG-1119) Add rotate(string, int) method to StringUtils

[Loic Guibert (JIRA)]

    [ 
https://issues.apache.org/jira/browse/LANG-1119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14513025#comment-14513025
 ] 

Loic Guibert commented on LANG-1119:
------------------------------------

The implementation can be found here :
GitHub PR #69 : https://github.com/apache/commons-lang/pull/69

> Add rotate(string, int) method to StringUtils
> ---------------------------------------------
>
>                 Key: LANG-1119
>                 URL: https://issues.apache.org/jira/browse/LANG-1119
>             Project: Commons Lang
>          Issue Type: New Feature
>          Components: lang.*
>            Reporter: Loic Guibert
>
> Add a method to rotate (circular shift) a String into StringUtils.
> {code:java}
> /**
>  * <p>Rotate (circular shift) a String of {@code shift} characters.</p>
>  * <ul>
>  *  <li>If {@code shift > 0}, right circular shift (ex : ABCDEF =&gt; 
> FABCDE)</li>
>  *  <li>If {@code shift < 0}, left circular shift (ex : ABCDEF =&gt; 
> BCDEFA)</li>
>  * </ul>
>  *
>  * <pre>
>  * StringUtils.rotate(null, *)        = null
>  * StringUtils.rotate("", *)          = ""
>  * StringUtils.rotate("abcdefg", 0)   = "abcdefg"
>  * StringUtils.rotate("abcdefg", 2)   = "fgabcde"
>  * StringUtils.rotate("abcdefg", -2)  = "cdefgab"
>  * StringUtils.rotate("abcdefg", 7)   = "abcdefg"
>  * StringUtils.rotate("abcdefg", -7)  = "abcdefg"
>  * StringUtils.rotate("abcdefg", 9)   = "fgabcde"
>  * StringUtils.rotate("abcdefg", -9)  = "cdefgab"
>  * </pre>
>  *
>  * @param str  the String to rotate, may be null
>  * @param shift  number of time to shift (positive : right shift, negative : 
> left shift)
>  * @return the rotated String,
>  *          or the original String if {@code shift == 0},
>  *          or {@code null} if null String input
>  */
> public static String rotate(String str, int shift);
> {code}



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