boolean (Object obj) { String str; if (obj instanceof String) { str = (String)obj; } else if (obj instanceof Text) { str = ((Text)obj).getText(); } else if (obj instanceof EntityRef) { return false; } else { return false; } for (int i = 0; i < str.length(); i++) { if (!Verifier.isXMLWhitespace(str.charAt(i))) { return false; } } return true; }