@Override Element toElement(Element parent) { Element test = parent.addElement(MailConstants.E_SIZE_TEST); test.addAttribute(MailConstants.A_NUMBER_COMPARISON, mSizeOp.toNumberComparison().toString()); if (mSizeOp.isNegative()) { test.addAttribute(MailConstants.A_NEGATIVE, true); } test.addAttribute(MailConstants.A_SIZE, mSize); return test; }