public static SchemaDocument[] inst2xsd(Reader[] instReaders,
    Inst2XsdOptions options) throws IOException, XmlException 
{
        XmlObject[] instances = new XmlObject[ instReaders.length ];
        for (int i = 0; i <  instReaders.length; i++)
        {
            instances[i] = XmlObject.Factory.parse(instReaders[i]);
        }
        return inst2xsd(instances, options);
}

 public static SchemaDocument[] inst2xsd(XmlObject[] instances,
    Inst2XsdOptions options) 
{
        if (options==null)
            options = new Inst2XsdOptions();
        // create structure
        TypeSystemHolder typeSystemHolder = new TypeSystemHolder();
        XsdGenStrategy strategy;
        switch (options.getDesign())
        {
            case Inst2XsdOptions.DESIGN_RUSSIAN_DOLL:
                strategy = new RussianDollStrategy();
                break;
            case Inst2XsdOptions.DESIGN_SALAMI_SLICE:
                strategy = new SalamiSliceStrategy();
                break;
            case Inst2XsdOptions.DESIGN_VENETIAN_BLIND:
                strategy = new VenetianBlindStrategy();
                break;
            default:
                throw new IllegalArgumentException("Unknown design.");
        }
        // processDoc the instance
        strategy.processDoc(instances, options, typeSystemHolder);
        if (options.isVerbose())
            System.out.println("typeSystemHolder.toString(): " + typeSystemHolder);
        SchemaDocument[] sDocs = typeSystemHolder.getSchemaDocuments();
        return sDocs;
}

 public static  void main(String[] args) 
{
        if (args==null || args.length == 0)
        {
            printHelp();
            System.exit(0);
            return;
        }
        Set flags = new HashSet();
        flags.add("h");
        flags.add("help");
        flags.add("usage");
        flags.add("license");
        flags.add("version");
        flags.add("verbose");
        flags.add("validate");
        Set opts = new HashSet();
        opts.add("design");
        opts.add("simple-content-types");
        opts.add("enumerations");
        opts.add("outDir");
        opts.add("outPrefix");
        CommandLine cl = new CommandLine(args, flags, opts);
        Inst2XsdOptions inst2XsdOptions = new Inst2XsdOptions();
        if (cl.getOpt("license") != null)
        {
            CommandLine.printLicense();
            System.exit(0);
            return;
        }
        if (cl.getOpt("version") != null)
        {
            CommandLine.printVersion();
            System.exit(0);
            return;
        }
        if (cl.getOpt("h") != null || cl.getOpt("help") != null || cl.getOpt("usage") != null)
        {
            printHelp();
            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]);
            printHelp();
            System.exit(0);
            return;
        }
        String design = cl.getOpt("design");
        if (design==null)
        {
            // default
        }
        else if (design.equals("vb"))
        {
            inst2XsdOptions.setDesign(Inst2XsdOptions.DESIGN_VENETIAN_BLIND);
        }
        else if (design.equals("rd"))
        {
            inst2XsdOptions.setDesign(Inst2XsdOptions.DESIGN_RUSSIAN_DOLL);
        }
        else if (design.equals("ss"))
        {
            inst2XsdOptions.setDesign(Inst2XsdOptions.DESIGN_SALAMI_SLICE);
        }
        else
        {
            printHelp();
            System.exit(0);
            return;
        }
        String simpleContent = cl.getOpt("simple-content-types");
        if (simpleContent==null)
        {
            //default
        }
        else if (simpleContent.equals("smart"))
        {
            inst2XsdOptions.setSimpleContentTypes(Inst2XsdOptions.SIMPLE_CONTENT_TYPES_SMART);
        }
        else if (simpleContent.equals("string"))
        {
            inst2XsdOptions.setSimpleContentTypes(Inst2XsdOptions.SIMPLE_CONTENT_TYPES_STRING);
        }
        else
        {
            printHelp();
            System.exit(0);
            return;
        }
        String enumerations = cl.getOpt("enumerations");
        if (enumerations==null)
        {
            // default
        }
        else if (enumerations.equals("never"))
        {
            inst2XsdOptions.setUseEnumerations(Inst2XsdOptions.ENUMERATION_NEVER);
        }
        else
        {
            try
            {
                int intVal = Integer.parseInt(enumerations);
                inst2XsdOptions.setUseEnumerations(intVal);
            }
            catch (NumberFormatException e)
            {
                printHelp();
                System.exit(0);
                return;
            }
        }
        File outDir = new File( cl.getOpt("outDir")==null ? "." : cl.getOpt("outDir"));
        String outPrefix = cl.getOpt("outPrefix");
        if (outPrefix==null)
            outPrefix = "schema";
        inst2XsdOptions.setVerbose((cl.getOpt("verbose") != null));
        boolean validate = cl.getOpt("validate")!=null;
        File[] xmlFiles = cl.filesEndingWith(".xml");
        XmlObject[] xmlInstances = new XmlObject[xmlFiles.length];
        if ( xmlInstances.length==0 )
        {
            printHelp();
            System.exit(0);
            return;
        }
        int i = 0;
        try
        {
            for (i = 0; i <  xmlFiles.length; i++)
            {
                xmlInstances[i] = XmlObject.Factory.parse(xmlFiles[i]);
            }
        }
        catch (XmlException e)
        {
            System.err.println("Invalid xml file: '" + xmlFiles[i].getName() + "'. " + e.getMessage());
            return;
        }
        catch (IOException e)
        {
            System.err.println("Could not read file: '" + xmlFiles[i].getName() + "'. " + e.getMessage());
            return;
        }
        SchemaDocument[] schemaDocs = inst2xsd(xmlInstances, inst2XsdOptions);
        try
        {
            for (i = 0; i <  schemaDocs.length; i++)
            {
                SchemaDocument schema = schemaDocs[i];
                if (inst2XsdOptions.isVerbose())
                    System.out.println("----------------------\n\n" + schema);
                schema.save(new File(outDir, outPrefix + i + ".xsd"), new XmlOptions().setSavePrettyPrint());
            }
        }
        catch (IOException e)
        {
            System.err.println("Could not write file: '" + outDir + File.pathSeparator +  outPrefix + i + ".xsd" + "'. " + e.getMessage());
            return;
        }
        if (validate)
        {
            validateInstances(schemaDocs, xmlInstances);
        }
}