private static void writeDefaultRetention(XmlWriter writer, DefaultRetention retention) { if (retention == null) { return; } writer.start("DefaultRetention"); addIfNotNull(writer, "Mode", retention.getMode()); Integer days = retention.getDays(); if (days != null) { writer.start("Days").value(Integer.toString(days)).end(); } Integer years = retention.getYears(); if (years != null) { writer.start("Years").value(Integer.toString(years)).end(); } writer.end(); } }