[jira] [Created] (LANG-1294) WordUtils.capitalize() can't handle 1:M conversions

["Duncan Jones (JIRA)" <ji...@apache.org>]

Duncan Jones created LANG-1294:
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             Summary: WordUtils.capitalize() can't handle 1:M conversions
                 Key: LANG-1294
                 URL: https://issues.apache.org/jira/browse/LANG-1294
             Project: Commons Lang
          Issue Type: Bug
          Components: lang.text.*
    Affects Versions: 3.5
            Reporter: Duncan Jones


Some case conversions are not 1:1, for instance the German letter ß, which is normally capitalised to 'SS'.

{code:java}
// Failing test
assertEquals("SS", WordUtils.capitalize("\u00DF"));
{code}

If we were using upper case and not title case, a solution such as the following would work:

{code:java}
public static String capitalize(final String str, final char... delimiters) {
    final int delimLen = delimiters == null ? -1 : delimiters.length;
    if (StringUtils.isEmpty(str) || delimLen == 0) {
        return str;
    }
    final StringBuffer buffer = new StringBuffer(str.length());
    final char[] chars = str.toCharArray();
    boolean capitalizeNext = true;
    for (int i = 0; i < chars.length; i++) {
        final char ch = chars[i];
        if (isDelimiter(ch, delimiters)) {
            capitalizeNext = true;
            buffer.append(ch);
        } else if (capitalizeNext) {
            // Use ENGLISH locale to be backwards compatible with previous releases, which
            // used Character.toUpperCase()
            buffer.append(String.valueOf(ch).toUpperCase(Locale.ENGLISH));
            capitalizeNext = false;
        } else {
            buffer.append(ch);
        }
    }
    return buffer.toString();
}
{code}

... but as we use title case, we can't use the String class to convert for us.



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