import java.io.IOException;
import java.lang.*;
import org.w3c.dom.Attr;
import org.w3c.dom.*;
import org.apache.xerces.parsers.DOMParser;
import org.xml.sax.*;

public class DOMParserDemo {

public void performDemo(String uri) {
DOMParser parser = new DOMParser();
try {
   parser.parse(uri);
   Document doc = parser.getDocument();
   doc = transform(doc);
   printNode(doc);
} catch (Exception e) {}
}

public Document transform(Document doc) {

/* écrire ici (solution "élégante" uniquement) */

return doc;
}

public void printNode(Node node) {

switch (node.getNodeType()) {

case Node.DOCUMENT_NODE:
   Document doc = (Document) node;
   System.out.println("<?xml version=\"1.0\"?>");
   printNode(doc.getDocumentElement());
   break;

case Node.ELEMENT_NODE:
   System.out.print("<");

/* écrire ici */

   System.out.print(node.getNodeName());
   NamedNodeMap attributs = node.getAttributes();
   for (int i=0; i<attributs.getLength(); i++) {
      System.out.print(" " + 
      attributs.item(i).getNodeName() + "=\"" + 
      attributs.item(i).getNodeValue() + "\"");
   }
   System.out.print(">");
   NodeList children = node.getChildNodes();
   if (children != null) {
      for (int i=0; i<children.getLength(); i++) {
      printNode(children.item(i));
   }}
   System.out.print("</");

/* écrire ici */

   System.out.print(node.getNodeName());
   System.out.print(">");
   break;

case Node.TEXT_NODE:
   System.out.print(node.getNodeValue());
   break;
   }
}

public static void main(String[] args) {
   String uri = args[0];
   //System.out.println("En train de traiter fichier "+uri);
   DOMParserDemo parserDemo = new DOMParserDemo();
   parserDemo.performDemo(uri);
   }
}