/*
 * (C) Copyright IBM Corp. 2004.  All rights reserved.
 *
 * US Government Users Restricted Rights Use, duplication or
 * disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 *
 * The program is provided "as is" without any warranty express or
 * implied, including the warranty of non-infringement and the implied
 * warranties of merchantibility and fitness for a particular purpose.
 * IBM will not be liable for any damages suffered by you as a result
 * of using the Program. In no event will IBM be liable for any
 * special, indirect or consequential damages or lost profits even if
 * IBM has been advised of the possibility of their occurrence. IBM
 * will not be liable for any third party claims against you.
 */

import org.apache.xerces.dom.DOMOutputImpl;
import org.w3c.dom.Document;
import org.w3c.dom.bootstrap.DOMImplementationRegistry;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.LSOutput;
import org.w3c.dom.ls.LSParser;
import org.w3c.dom.ls.LSSerializer;

/**
 * This code uses the DOM Level 3 LS classes to serialize
 * an XML file to standard output.
 */

public class DomFour
{
  public void parseAndPrint(String uri)
  {
    Document doc = null;

    try
    {
      System.setProperty(DOMImplementationRegistry.PROPERTY,
        "org.apache.xerces.dom.DOMXSImplementationSourceImpl");
      DOMImplementationRegistry direg =
        DOMImplementationRegistry.newInstance();
      DOMImplementationLS dils = 
        (DOMImplementationLS) direg.getDOMImplementation("LS");
      LSParser lsp = dils.createLSParser
        (DOMImplementationLS.MODE_SYNCHRONOUS, null);

      doc = lsp.parseURI(uri);

      LSSerializer domWriter = dils.createLSSerializer();
      LSOutput lso = new DOMOutputImpl();
      lso.setByteStream(System.out);
      domWriter.write(doc, lso);
    }
    catch (Exception e)
    {
      System.err.println("Sorry, an error occurred: " + e);
    }
  }

  /** Main program entry point. */
  public static void main(String argv[]) 
  {
    if (argv.length == 0 ||
        (argv.length == 1 && argv[0].equals("-help")))
    {
      System.out.println("\nUsage:  java DomFour uri");
      System.out.println("   where uri is the URI of the XML " + 
                         "document you want to print.");
      System.out.println("   Sample:  java DomFour sonnet.xml");
      System.out.println("\nParses an XML document, then writes " +
                         "the DOM tree to the console.");
      System.exit(1);
    }

    DomFour d4 = new DomFour();
    d4.parseAndPrint(argv[0]);
  }
}