/* a dom parser that displays all data of an xml file */
import javax.xml.parsers.*; 
import org.xml.sax.*;
import java.io.*;
import org.w3c.dom.*;
import java.lang.String;

public class DomParser{
    public static void main(String argv[])
    {
        if (argv.length != 1) {
            System.err.println("Usage: java DomParser filename");
            System.exit(1);
        }
        DocumentBuilderFactory factory =
            DocumentBuilderFactory.newInstance();
        factory.setIgnoringElementContentWhitespace(true);
	factory.setValidating(true);
        try {
           DocumentBuilder builder = factory.newDocumentBuilder();
           Document document = builder.parse( new File(argv[0]) );
	   // this could also read from a URL or any other stream
           Element root = document.getDocumentElement();
           if (root != null) PrintTree(root,0);
        } catch (SAXException sxe) {
           // Error generated during parsing
             System.err.println(sxe);
        } catch (ParserConfigurationException pce) {
            // Parser with specified options can't be built
             System.err.println(pce);
        } catch (IOException ioe) {
             System.err.println(ioe);
        }
    } // end of main

    // PrintTree - prints the dom tree, indenting each level 
    //    an additional 4 spaces
    private static void PrintTree(Element e, int indent) 
    {
	int i;
        for (i=0;i<indent;i++) System.out.print(" ");
        System.out.println("Element Tag " + e.getNodeName());
        Node child = e.getFirstChild();
        while (child != null) {
            int type;
            type = child.getNodeType();
	    if (type == 1) { /* element */
                      PrintTree((Element)child,indent+4);
	       }
            else if (type == 3) { /* text */
               for (i=0;i<indent+4;i++) System.out.print(" ");
               String s = child.getNodeValue();
               System.out.println("Text: " + child.getNodeValue());
	    }
            else if (type == 8) { /* comment */
		for (i=0;i<indent+4;i++) System.out.print(" ");
                System.out.println("Comment" + child.getNodeValue());
	    }
	child = child.getNextSibling();
	}
    }
}