static { allowedChars = StringUtil.charSet(" '+,-./:=?()"); for (char c = 'a'; c <= 'z'; c++) { allowedChars.set(c); } for (char c = 'A'; c <= 'Z'; c++) { allowedChars.set(c); } for (char c = '0'; c <= '9'; c++) { allowedChars.set(c); } }