set system date to OAMessageDateField in OAF

       SimpleDateFormat f = new SimpleDateFormat("yyyy-mm-dd");
       String dateString = f.format(cal.getTime());
       Date currdate = new Date();
       currdate = (Date)f.parse(dateString);
       OAMessageDateFieldBean oamessagedatefieldbean = (OAMessageDateFieldBean)oawebbean.findIndexedChildRecursive("CorporateRateDate");
       oamessagedatefieldbean.setValue(oapagecontext, currdate);