public static XmlObject buildDocument(boolean enableOutput) 
{
        XmlOptions opt = (new XmlOptions()).setSavePrettyPrint();
        // Build a new document
        RootDocument doc = RootDocument.Factory.newInstance();
        RootDocument.Root figures = doc.addNewRoot();
        if (enableOutput)
            System.out.println("Empty document:\n" + doc.xmlText(opt) + "\n");
        // Add abstract figures
        Shape s1 = figures.addNewFigure();
        s1.setId("001");
        Shape s2 = figures.addNewFigure();
        s2.setId("002");
        // Document contains two shapes now
        // Because the shape is abstract, the document will not yet be valid
        if (enableOutput)
        {
            System.out.println("Document containing the abstract types:\n" + doc.xmlText(opt));
            System.out.println("Valid = " + doc.validate() + "\n");
        }
        // Change the abstract figures to concrete ones
        Circle circle = (Circle) s1.changeType(Circle.type);
        circle.setRadius(10.0);
        Square square = (Square) s2.changeType(Square.type);
        square.setSide(20.0);
        // Document contains two concrete shapes and is valid
        if (enableOutput)
        {
            System.out.println("Final document:\n" + doc.xmlText(opt));
            System.out.println("Vald = " + doc.validate());
        }
        return doc;
}

 public static  void main(String[] args) 
{
        buildDocument(true);
}