/* PURPOSE:This is a servelet which given the the filled in XML form will write the data to an xml document The servlet then produces a redirect to the Start Form BY: Charles Pugh DATE: 30/8/2000 */ import java.io.*; import java.util.*; import org.w3c.dom.*; import org.w3c.dom.Document; import org.xml.sax.SAXException; import org.xml.sax.SAXParseException; import javax.servlet.*; import javax.servlet.http.*; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.DocumentBuilder; import com.sun.xml.tree.*; public class saveform extends HttpServlet { String xmlFileName; String xmlLocation; String SchemaFileName; String SchemaLocation; String[] elementNames = new String[20]; String[] elementValues = new String[20]; Document schemaDoc; Document document; PrintWriter out; Writer fileOut; String sep = ""; int noOfElements = 0; //String[] elName = new String[20]; public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); out = response.getWriter(); xmlFileName = request.getParameter("XMLFileName"); xmlLocation = request.getParameter("FileDIR"); SchemaFileName = request.getParameter("Schema"); SchemaLocation = request.getParameter("SchemaDIR"); Enumeration paramNames = request.getParameterNames(); int i = 0; noOfElements = 0; while(paramNames.hasMoreElements()) { String paramName = (String)paramNames.nextElement(); elementNames[i] = paramName; String[] paramValues = request.getParameterValues(paramName); if (paramValues.length == 1) { elementValues[i] = paramValues[0]; }//end if else { for(int j=0; j\n" + "\n" + "" + "Your XML document is being Saved\n" + "\n" + "

" + title + "

\n"); parseXML(); out.println(""); }//end writeHTML public void parseXML(){ try { DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance(); DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder(); schemaDoc = docBuilder.parse (new File (SchemaLocation, SchemaFileName)); document = docBuilder.newDocument (); changeXMLDoc(); XMLOut(document, xmlFileName); }//end Try catch (SAXParseException err) {System.out.println ("** Parsing error" + ", line " + err.getLineNumber () + ", uri " + err.getSystemId ()); parseError(" " + err.getMessage ()); // print stack trace as below } catch (SAXException e) {} catch (Throwable t) {} }//end parseXML public void parseError (String error){ out.println("" + error); }//end parse error public void changeXMLDoc(){ Node elem1 = schemaDoc.getDocumentElement().getChildNodes().item(1); String SchemaName = elem1.getAttributes().item(0).getNodeValue(); String type = findType(elem1); Element root; if (type == "simple") dealWithSimple(elem1); if (type == "complex"){ root = dealWithComplex(elem1); document.appendChild(root); } }//end changeXMLDoc public String findType(Node el){ String type = "simple"; if (el.getChildNodes().getLength() > 0){ for(int i=1; i < el.getChildNodes().getLength(); i=i+2){ if(el.getChildNodes().item(i).getNodeName() == "xsd:complexType") type = "complex"; }//end for }//end if else type = "simple"; return type; }//end findType public Element dealWithSimple (Node el){ String value = "No match"; String tagName = el.getAttributes().getNamedItem("name").getNodeValue(); Element e = (document.createElement(tagName)); //maches parameter value with tag for(int i=0; i 0) { fileOut = new FileWriter (new File (fil)); } else { fileOut = new OutputStreamWriter (System.out, "UTF8"); } emit ("\n"); XMLOutElement (outDoc.getDocumentElement(), ""); out.println("
"); out.println("
"); out.println("
"); out.println("

Your XML File :

" + xmlFileName + "

"); out.println("
"); out.println("
"); out.println("
"); out.println("

Has been successfully saved to :

" + xmlLocation + "

"); out.println("
"); out.println("
"); out.println("
"); out.println("

Please Wait.....

"); } catch (IOException e) {throw new SAXException("File Error", e);} }//end XMLout private void XMLOutElement (Element el, String pre)throws SAXException { // Processing for opening tag emit (pre + "<" + el.getTagName()); // Processing for attributes NEEDED emit (">\n"); // Output contents - Could elide for null contents XMLOutNodeList (el.getFirstChild (), pre); // Processing for closing tag emit (pre + "\n"); }//end XMLOutElement private void XMLOutNodeList (Node nd, String pre)throws SAXException { while (nd != null) { switch (nd.getNodeType()) { case nd.TEXT_NODE: // Note: may need to extract data in chunks if (hasText ((Text) nd)) { emit (pre + nd.getNodeValue() + "\n"); } break; case nd.ELEMENT_NODE: XMLOutElement ((Element) nd, pre + sep); break; }//end switch nd = nd.getNextSibling (); }//end while }//end XMLOutNodeList private boolean hasText (Text tx){ return (tx.getData().trim().length() > 0); }//end hasText private void emit (String s)throws SAXException { try { fileOut.write (s); fileOut.flush (); } catch (IOException e) {throw new SAXException ("I/O error", e);} }//end emit }//endSaveForm