public static String indent(String xmldoc) throws XmlException, IOException 
{
        StringWriter sw = new StringWriter();
        XmlObject doc = XmlObject.Factory.parse(xmldoc, (new XmlOptions()).setLoadLineNumbers());
        doc.save(sw, new XmlOptions().setSavePrettyPrint().setSavePrettyPrintIndent(DEFAULT_INDENT));
        sw.close();
        return sw.getBuffer().toString();
}

 public static  void main(String[] args) 
{
        Set flags = new HashSet();
        flags.add("h");
        flags.add("help");
        flags.add("usage");
        flags.add("license");
        flags.add("version");
        CommandLine cl = new CommandLine(args, flags, Collections.singleton("indent"));
        if (cl.getOpt("h") != null || cl.getOpt("help") != null || cl.getOpt("usage") != null)
        {
            printUsage();
            System.exit(0);
            return;
        }
        String[] badopts = cl.getBadOpts();
        if (badopts.length  > 0)
        {
            for (int i = 0; i <  badopts.length; i++)
                System.out.println("Unrecognized option: " + badopts[i]);
            printUsage();
            System.exit(0);
            return;
        }
        if (cl.getOpt("license") != null)
        {
            CommandLine.printLicense();
            System.exit(0);
            return;
        }
        if (cl.getOpt("version") != null)
        {
            CommandLine.printVersion();
            System.exit(0);
            return;
        }
        if (cl.args().length == 0)
        {
            printUsage();
            return;
        }
        String indentStr = cl.getOpt("indent");
        int indent;
        if (indentStr == null)
            indent = DEFAULT_INDENT;
        else
            indent = Integer.parseInt(indentStr);
        File[] files = cl.getFiles();
        for (int i = 0; i <  files.length; i++)
        {
            XmlObject doc;
            try
            {
                doc = XmlObject.Factory.parse(files[i], (new XmlOptions()).setLoadLineNumbers());
            }
            catch (Exception e)
            {
                System.err.println(files[i] + " not loadable: " + e.getMessage());
                continue;
            }
            try
            {
                doc.save(System.out, new XmlOptions().setSavePrettyPrint().setSavePrettyPrintIndent(indent));
            }
            catch (IOException e)
            {
                System.err.println("Unable to pretty print " + files[i] + ": " + e.getMessage());
            }
        }
}

 public static  void printUsage() 
{
       
        System.out.println("Pretty prints XML files.");
        System.out.println("Usage: xpretty [switches] file.xml");
        System.out.println("Switches:");
        System.out.println("    -indent #   use the given indent");
        System.out.println("    -license prints license information");
}