/**
*Class SAXChecker
*By Martin Carlsson
*Internetprogrammering 4 Course
*/
import org.xml.sax.*;
import org.xml.sax.helpers.XMLReaderFactory;
import java.io.*;
/**
*Class SAXChecker is used for parsing XML dokuments. Med hjälp av SaxErrorHandler ges resultatet av parsningen.
*@see SAXErrorHandler    
*/
public class SAXChecker {
    /**
    /*Creates an XMLReader for parsing the XML documnet the user have chosen.
    *If the second argument is "true" it tries to validate the document.
    *@param args argument 1 in the argument array is the XML document to parse, while argument 2 can be
    *"false" or "true" to set validation to on or off. Default är false(i.e. off).
    */
    static public void main(String[] args) {
        String filename;  
        boolean validate = false;
        if(args.length < 2) {
            showUsage();
            return;
        }
        else {
            filename = args[0];
                if(args[1].trim().equals("true"))
                    validate = true;
        }
        XMLReader reader = null;
        try {
            reader = XMLReaderFactory.createXMLReader();
            reader.setFeature("http://xml.org/sax/features/validation", validate);
        }
        catch (SAXException e) {
            System.err.println(e.getMessage());
        }
        // Sets ErrorHandler
        reader.setErrorHandler(new SAXErrorHandler(filename));
        try {
            InputSource inputSource = new InputSource(filename);
            reader.parse(inputSource);
        System.out.println("\n**********************SAXChecker*************************");
        if(validate) 
            System.out.println("\nThe file \""+ filename  + "\" validate ok!");
        else
            System.out.println("\nThe file \"" + filename  + "\" is wellformed");
        } 
        catch (SAXException e) {
            return;
        } 
        catch (IOException e) {
            System.err.println(e);
            return;
        }
    }
    /**
    Shows usage information.
    */
    private static void showUsage() {
        System.out.println("Two arguments are required!");
        System.out.println("Usage: SAXChecker <xml filename><validate>");
        System.out.println("To view usage information again, type in: SAXParser <help>");
    }
} // End Class SAXChecker