@WebMethod(operationName = "ReadTransfert")
    public ArrayList<Transfert> ReadTransfert(@WebParam(name = "trans_id") String trans_id) {
            Transfert trans  = new Transfert();
            ArrayList<Transfert> transs = new ArrayList<Transfert>();
            ArrayList<QueryCriteria> qc = new ArrayList<QueryCriteria>();
            if(!trans_id.equals("-1")){
                qc.add(new QueryCriteria("trans_id", trans_id, Operand.EQUALS));
            }
            ArrayList<String> fields = new ArrayList<String>();
            ArrayList<QueryOrder> order = new ArrayList<QueryOrder>();
        try {
           transs = trans.Read(qc, fields, order);
        } catch (SQLException ex) {
            Logger.getLogger(JAX_WS.class.getName()).log(Level.SEVERE, null, ex);
        }
            if(transs.isEmpty()){
                return null;
            }
        return transs;
    }