Object to XML

gistfile1.txt

public class ReportDefintionBase {

    public static final String T = "t";
    public static final String F = "f";

    public final String toXMLString() {
        StringWriter stringWriter = new StringWriter();
        Marshaller marshaller = null;
        try {
            marshaller = JAXBContext.newInstance(this.getClass()).createMarshaller();
            marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
            marshaller.marshal(this, stringWriter);
            return stringWriter.toString();
        } catch (JAXBException e) {
            e.printStackTrace();
        }
        return "";
    }
}


@XmlRootElement(name = "forward_cash")
@XmlAccessorType(XmlAccessType.NONE)
@SuppressFBWarnings
public class ForwardCashReportDefinition extends ReportDefintionBase {

    @XmlElement
    public JustOrNothing from_date = JustOrNothing.nothing();
    @XmlElement
    public JustOrNothing to_date = JustOrNothing.nothing();
    @XmlElement
    public JustOrNothing storage_scheduling_refdate = JustOrNothing.nothing();
    @XmlElement
    public String filter_expr = "";
    @XmlElement
    public String cash_settle_futures = T;
    @XmlElement
    public String include_contingent_flows = T;
    @XmlElement
    public String include_location_info = T;
    @XmlElement
    public String include_zero_amounts = T;
    @XmlElement
    public String net_bond_positions = T;
    @XmlElement
    public String cash_settle_options = T;
    @XmlElement
    public String options_settle_at_maturity = T;
    @XmlElement
    public String include_repo_eom_fees = T;
    @XmlElement
    public String cash_settle_options_at_strike = T;
    @XmlElement
    public String cash_settle_options_in_the_money = T;
    @XmlElement
    public String apply_rounding = T;
}

public class Main {
    public static void main(String[] args) {
        Random random = new Random();
        for (int i = 0 ; i < 9000 ; i++) {
            int i1 = random.nextInt(10);
            int i2 = random.nextInt(10);
            int i3 = random.nextInt(10);
            int i4 = random.nextInt(10);
            int i5 = random.nextInt(10);
            int i6 = random.nextInt(10);
            int i7 = random.nextInt(10);
            int i8 = random.nextInt(10);
            int i9 = random.nextInt(10);
            int i10 = random.nextInt(10);
            int i11 = random.nextInt(10);
            int i12 = random.nextInt(10);
            String low  = "" + i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9 + i10 + i11 + i12 + "0000";
            String high = "" + i1 + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9 + i10 + i11 + i12 + "9999";
            System.out.println(String.format("<record> <LO_RANGE>%s</LO_RANGE> <HI_RANGE>%s</HI_RANGE> </record>", low, high));
        }
    }
}