Well, sure, I was just hoping there was a way to make match input and output types.
Gary > -----Original Message----- > From: Jörg Schaible [mailto:joerg.schai...@gmx.de] > Sent: Sunday, March 07, 2010 05:54 > To: dev@commons.apache.org > Subject: RE: [lang] LANG-510 > > Gary Gregory wrote: > > > When I replaced the current implementation of StringUtils.left(String,int) > > with: > > > > @SuppressWarnings("unchecked") > > public static <T extends CharSequence> T left(T cs, int len) { > > if (cs == null) { > > return null; > > } > > if (len < 0) { > > return (T) cs.subSequence(0, 0); > > } > > if (cs.length() <= len) { > > return cs; > > } > > return (T) cs.subSequence(0, len); > > } > > > > Everything compiled, all tests passed, and no Unnecessary cast warnings > > came up (as provided by Eclipse 3.6M5) > > > > The problem is what happens when you pass in a non-Strings, like a > > StringBuilder. The implementation of subsequence for StringBuilder returns > > a new String, not new StringBuilder. > > Then why not use already proposed: > > public static String left(CharSequence str, int len) { > if (str == null) { > return null; > } > return str.subSequence(0, len).toString(); > } > > ?? > > - Jörg > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org > For additional commands, e-mail: dev-h...@commons.apache.org
