public SAXValidatorDemo() 
{

}

 public static  void main(String[] args) 
{
        run(new SAXValidatorDemo(), args);
}

 public  void run(String[] args) throws Exception 
{
        if (args.length <  1) {
            printUsage("< xmlFileNameOrURL > < onParse >");
        }
        String fileName = args[0];
        boolean validateOnParse = false;
        if (args.length  > 1) {
            String boolText = args[1];
            if (boolText.equalsIgnoreCase("true")) {
                validateOnParse = true;
            }
        }
        validate(fileName, validateOnParse);
}

 protected  void validate(String url,
    boolean validateOnParse) throws Exception 
{
        println("Parsing: " + url + " with validation mode: " + validateOnParse);
        XMLErrorHandler errorHandler = new XMLErrorHandler();
        if (validateOnParse) {
            // validate as we parse
            SAXReader reader = new SAXReader(true);
            reader.setErrorHandler(errorHandler);
            try {
                Document document = reader.read(url);
                println("Document: " + url + " is valid!");
            } catch (DocumentException e) {
                println("Document: " + url + " is not valid");
                println("Exception: " + e);
            }
        } else {
            // parse without validating, then do that later
            SAXReader reader = new SAXReader();
            Document document = reader.read(url);
            println("Document URI: " + document.getName());
            // now lets set a doc type if one isn't set
            DocumentType docType = document.getDocType();
            if (docType == null) {
                println("Adding an NITF doc type");
                document.addDocType("nitf", null, "nitf.dtd");
            }
            // now lets validate
            try {
                SAXValidator validator = new SAXValidator();
                validator.setErrorHandler(errorHandler);
                validator.validate(document);
                println("Document: " + url + " is valid!");
            } catch (SAXException e) {
                println("Document: " + url + " is not valid");
                println("Exception: " + e);
            }
        }
        // now lets output any errors as XML
        Element errors = errorHandler.getErrors();
        if (errors.hasContent()) {
            XMLWriter writer = new XMLWriter(OutputFormat.createPrettyPrint());
            writer.write(errors);
        }
}