/* a dom parser that displays attibutes and text */
import javax.xml.parsers.*; 
import org.xml.sax.*;
import java.io.*;
import org.w3c.dom.*;
import java.lang.String;

public class DomParser2{
    public static void main(String argv[])
    {
        if (argv.length != 1) {
            System.err.println("Usage: java DomParser2 filename");
            System.exit(1);
        }
        DocumentBuilderFactory factory =
            DocumentBuilderFactory.newInstance();
	// factory.setValidating(true);   
	// factory.setNamespaceAware(true);
	factory.setIgnoringElementContentWhitespace(true);
        try {
           DocumentBuilder builder = factory.newDocumentBuilder();
           Document document = builder.parse( new File(argv[0]) );
           Element root = document.getDocumentElement();
           if (root != null) PrintTree(root,0);
        } catch (SAXException sxe) {
           // Error generated during parsing)
           Exception  x = sxe;
           if (sxe.getException() != null)
               x = sxe.getException();
           x.printStackTrace();

        } catch (ParserConfigurationException pce) {
            // Parser with specified options can't be built
            pce.printStackTrace();

        } catch (IOException ioe) {
           // I/O error
           ioe.printStackTrace();
        }
    } // main

    // PrintTree - prints the dom tree, indenting each level 
    //    an additional 4 spaces.  it also prints the attributes
    // and the embedded text for para and chaptertitle 
    private static void PrintTree(Node n, int indent) 
    {
        Element e = (Element)n;
        String s = e.getTagName();
        int i;
        for (i=0;i<indent;i++) System.out.print(" ");
        System.out.print(s + " ");
        NamedNodeMap attributes = e.getAttributes();
        for (i=0;i<attributes.getLength();i++) {
            Node attrNode = attributes.item(i);
            String attrName = attrNode.getNodeName();
            String attrVal  = attrNode.getNodeValue();
            System.out.print(attrName + "=" + attrVal);
        }
        System.out.println(); 
              
        Node child = n.getFirstChild();
            if (child instanceof Text) {
		Text tchild = (Text)child;
                String data = tchild.getData();
                for(i=0;i<indent+4;i++)
                   System.out.print(" ");
                System.out.println(data);
	    }
        while (child != null) {
	    if (child instanceof Element)  // ignores whitespaces 
                   PrintTree(child,indent+4);
 	    child = child.getNextSibling();
	}
    }
}
/*****************
book version=draft
    title 
        Network Programming for Dummies
    author 
        lastname 
            Ingalls
        firstname 
            Bob
    date 
        2005
    chapter num=1
        chaptertitle 
            Introduction
        para 
             Blah Blah Blah 
        para 
             Yada Yada Yada 
    chapter num=2
        chaptertitle 
            Sockets
        para 
             Call socket
        para 
             Call bind 
        para 
             Call listen 
        para 
             Call accept 
****************/