/**
* A simple DOM parser. This parser parses the file whose name is
* passed as an argument. It then merely prints out the node type, name
* and value for the Document node.
*
* @author Nauman Chaudhry
* @date Apr 6, 08
*/

// Note that DocumentBuilder and DocumentBuilderFactory are part
// of JAXP and hence appear in the package: javax.xml.parsers
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

// Document interface is part of DOM API and appears in org.w3c.dom
import org.w3c.dom.Document;

public class Ex1SimpleDom {

  public static void main(String[] args) throws Exception 
  {

    // First get a document builder factory
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();

    // Now get a document builder
    DocumentBuilder db = null;
    try {
      db = dbf.newDocumentBuilder();
    } catch (ParserConfigurationException pce) {
      pce.printStackTrace();
      return;
    }
    
    // Call the parse method on DocumentBuilder. This returns an object
    // of type Document
    Document myDoc = db.parse(args[0]);
    // Now we just print the nodeType, nodeName and nodeValue of the 
    // document node. Look at the JavaDoc for the Node interface and
    // you will see that for Document node:
    //	name = "#document" (i.e., a fixed string)
    //	value = null
    // The utility of Document node is that from it we can get the DOCTYPE declaration
    // as well as the Root Element and then traverse the document
    System.out.println(" node type = " + myDoc.getNodeType() + 
		" name = " + myDoc.getNodeName() + " value = " + myDoc.getNodeValue());
  }
}