/*
 * @(#)TransformationApp02a.java	1.9 98/11/10
 */
//for DOMEcho01 part
import java.io.File;
import java.io.IOException;
import java.io.*;
import java.io.FilterOutputStream;

//-----
import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory;  
import javax.xml.parsers.FactoryConfigurationError;  
import javax.xml.parsers.ParserConfigurationException;
 
import org.xml.sax.SAXException;  
import org.xml.sax.SAXParseException;

import org.w3c.dom.Document;
import org.w3c.dom.DOMException;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Attr;
import org.w3c.dom.NodeList;

// For write operation
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerConfigurationException;

import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

public class TransformationApp02a 
{
    // Global value so it can be ref'd by the tree-adapter
    static Document document;

    public static void main (String argv [])
    {
        if (argv.length != 1) {
            System.err.println ("Usage: java TransformationApp02a filename");
            System.exit (1);
        }

        DocumentBuilderFactory factory =
            DocumentBuilderFactory.newInstance();
        //factory.setNamespaceAware(true);
        //factory.setValidating(true);
 
        try {
            File f = new File(argv[0]);
 
            DocumentBuilder builder = factory.newDocumentBuilder();
            document = builder.parse(f);
	    //----------------- 
	    Node root =document.getDocumentElement();	    
	    if(root==null)
		System.out.println("getDocumentElement returned NULL");
	    else
		System.out.println( root.getNodeName() );
	    //System.exit(0);
	    
		// Node root = findSubNode("slideShow", document.getDocumentElement());
	    /*1*/
	    root.appendChild( document.createTextNode("Some text.\n ") );
	    /*2*/
	    Element workingElement = document.createElement("MyXMLtag");
	
	    root.appendChild( workingElement );
	    workingElement.appendChild(document.createTextNode("Some Content "));
	    /*3*/
	    Element workingElement2 = document.createElement("MyXMLtag");
	
	    root.appendChild( workingElement2 );
	    workingElement2.appendChild(document.createTextNode("Some other Content "));
	    Attr attribute = document.createAttribute("title");
	    workingElement2.setAttributeNode(attribute);
	    attribute.setNodeValue("Nachum's favorite title");
	    /*4*/

	    Element workingElement3 = document.createElement("MyXMLtag");
	
	    root.appendChild( workingElement3 );
	    workingElement3.appendChild(document.createTextNode("Some New other Content "));
	    attribute = document.createAttribute("title");
	    workingElement3.setAttributeNode(attribute);
	    attribute.setNodeValue("Nachum's favorite title");
	    Element subelement = document.createElement("MySubElement");	    

	    workingElement3.appendChild( subelement );
	    subelement.appendChild(document.createTextNode("Some Sub Content "));

	    //replaceChild 


	    //setAttributeNode

      	    //------------------
            // Use a Transformer for output
            TransformerFactory tFactory =
                TransformerFactory.newInstance();
            Transformer transformer = tFactory.newTransformer();
 
            DOMSource source = new DOMSource(document);
	    File file = new File("stam.stam");
            StreamResult result = new StreamResult(file);
	    //StreamResult result = new StreamResult(System.out);
            transformer.transform(source, result);
           
                   
        } catch (TransformerConfigurationException tce) {
           // Error generated by the parser
           System.out.println ("\n** Transformer Factory error");
           System.out.println("   " + tce.getMessage() );

           // Use the contained exception, if any
           Throwable x = tce;
           if (tce.getException() != null)
               x = tce.getException();
           x.printStackTrace();
      
        } catch (TransformerException te) {
           // Error generated by the parser
           System.out.println ("\n** Transformation error");
           System.out.println("   " + te.getMessage() );

           // Use the contained exception, if any
           Throwable x = te;
           if (te.getException() != null)
               x = te.getException();
           x.printStackTrace();
           
        } catch (SAXParseException spe) {
           // Error generated by the parser
           System.out.println("\n** Parsing error"
              + ", line " + spe.getLineNumber()
              + ", uri " + spe.getSystemId());
           System.out.println("   " + spe.getMessage() );

           // Use the contained exception, if any
           Exception  x = spe;
           if (spe.getException() != null)
               x = spe.getException();
           x.printStackTrace();

         } catch (SAXException sxe) {
           // Error generated by this application
           // (or a parser-initialization error)
           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  

  static  public Node findSubNode(String name, Node node) {
	if (node.getNodeType() != Node.ELEMENT_NODE) {
	    System.err.println("Error: Search node not of element type");
	    System.exit(22);
	}

	if (! node.hasChildNodes()) return null;

	NodeList list = node.getChildNodes();
	for (int i=0; i < list.getLength(); i++) {
	    Node subnode = list.item(i);
	    if (subnode.getNodeType() == Node.ELEMENT_NODE) {
		if (subnode.getNodeName() == name) return subnode;
	    }
	}
	return null;
    }

    static public String getText(Node node) {
	StringBuffer result = new StringBuffer();
	if (! node.hasChildNodes()) return "";

	NodeList list = node.getChildNodes();
	for (int i=0; i < list.getLength(); i++) {
	    Node subnode = list.item(i);
	    if (subnode.getNodeType() == Node.TEXT_NODE) {
		result.append(subnode.getNodeValue());
	    }
	    else if (subnode.getNodeType() ==
		     Node.CDATA_SECTION_NODE) 
		{
		    result.append(subnode.getNodeValue());
		}
	    else if (subnode.getNodeType() ==
		     Node.ENTITY_REFERENCE_NODE) 
		{
		    // Recurse into the subtree for text
		    // (and ignore comments)
		    result.append(getText(subnode));
		}
	}
	return result.toString();
    }


}