Column heading -refer to the webdynpro tutorial 34

Question

Excel Export Using the Web Dynpro Binary Cache (34)
column heading problem
https://www.sdn.sap.com/irj/sdn/downloaditem?rid=/library/uuid/1208c2cd-0401-0010-4ab6-f4736074acc6
u will get the heading like
/Products
/ProductsElement/Article
/ProductsElement/Quantity
/ProductsElement/Price
the code that form the heading
public void exportToExcel2003( com.sap.tc.webdynpro.progmodel.api.IWDNode dataNode, java.util.Map columnInfos )
    //@@begin exportToExcel2003()
    byte[] excelXMLFile;
    IWDCachedWebResource cachedExcelResource = null;
    String fileName = dataNode.getNodeInfo().getName() + ".xls";
    try {
      // create Excel 2003 XML data as a byte array for the given context node, attributes and headers       
      excelXMLFile = this.toExcel(dataNode, columnInfos).getBytes("UTF-8");
      // create a cached Web Dynpro XLS Resource for the given byte array and filename
      cachedExcelResource = this.getCachedWebResource(excelXMLFile, fileName, WDWebResourceType.XLS);
      // Store URL and filename of cached excel resource in context.
      if (cachedExcelResource != null) {
        wdContext.currentContextElement().setExcelFileURL(cachedExcelResource.getURL());
        wdContext.currentContextElement().setExcelFileName(cachedExcelResource.getResourceName());
        // Open popup window with a link to the cached excel file web resource.
        this.openExcelLinkPopup();
      } else {
        wdComponentAPI.getMessageManager().reportException("Failed to create Excel file from table!", true);
    } catch (UnsupportedEncodingException e) {
      wdComponentAPI.getMessageManager().reportException(e.getLocalizedMessage(), true);
    } catch (WDURLException e) {
      wdComponentAPI.getMessageManager().reportException(e.getLocalizedMessage(), true);
    //@@end
  //@@begin javadoc:closeExcelLinkPopup()
   * Destroys popup window. To be called in an action event handler of a view controller related to
   * the opened popup window. View controller must have a controller usage declared for invoking
   * this public method of the public component controller API. 
  //@@end
  public void closeExcelLinkPopup( )
    //@@begin closeExcelLinkPopup()
    if (excelLinkWindow != null) {
      excelLinkWindow.destroy();
      excelLinkWindow = null;
    //@@end
   * The following code section can be used for any Java code that is
   * not to be visible to other controllers/views or that contains constructs
   * currently not supported directly by Web Dynpro (such as inner classes or
   * member variables etc.). </p>
   * Note: The content of this section is in no way managed/controlled
   * by the Web Dynpro Designtime or the Web Dynpro Runtime.
  //@@begin others
   * Create an XML respresentation of the given context data.
   * RESTRICTION: Excel 2003 must be installed on the client machine for opening the given xml data
   * representation as an Excel file. 
   * @return string respresentation of the created xml data for Excel 2003.
  private String toExcel(IWDNode dataNode, Map columnInfos) {
    StringBuffer x = new StringBuffer();
    String attributeName, headerName;
    String entriesName = dataNode.getNodeInfo().getName();
    String entryName = entriesName + "Element";
    // trim given header texts, so that XML element names adhere to the rule 'no spaces contained'.    
    trimHeaderTexts(columnInfos);
    x.append("<?xml version='1.0' encoding='UTF-8' standalone='no'?>n");
    x.append("<").append(entriesName).append(">n");
    for (int i = 0; i < dataNode.size(); ++i) {
      IWDNodeElement dataNodeElement = dataNode.getElementAt(i);
      x.append("<").append(entryName).append(">n");
      for (Iterator iter = columnInfos.keySet().iterator(); iter.hasNext();) {
        attributeName = (String) iter.next();
        headerName = (String) columnInfos.get(attributeName);
        x
          .append("<")
          .append(headerName)
          .append(">")
          .append(dataNodeElement.getAttributeValue(attributeName))
          .append("</")
          .append(headerName)
          .append(">n");
      x.append("</").append(entryName).append(">n");
    x.append("</").append(entriesName).append(">n");
    return x.toString();
   * Create cached Web Dynpro resource for given byte-array, filename and web resource type (xls).
   * @return Excel file as cached Web Dynpro web resource. 
  private IWDCachedWebResource getCachedWebResource(byte[] file, String name, WDWebResourceType type) {
    IWDCachedWebResource cachedWebResource = null;
    if (file != null) {
      cachedWebResource = WDWebResource.getWebResource(file, type);
      cachedWebResource.setResourceName(name);
    return cachedWebResource;
   * Opens new popup window. The popup contains a link to the newly generated, cached excel file. 
  private void openExcelLinkPopup() {
    excelLinkWindow =
      wdComponentAPI.getWindowManager().createModalWindow(
        wdComponentAPI.getComponentInfo().findInWindows("ExcelLinkPopup"));
    excelLinkWindow.setWindowPosition(WDWindowPos.CENTER);
    excelLinkWindow.open();
  * Trims all given header texts because XML element names (to be created) must adhere to XML
  * rules (that is, they cannot include special characters, spaces, and so on.
  private void trimHeaderTexts(Map columnInfos) {
    String attributeName, trimmedHeaderText;
    for (Iterator iter = columnInfos.keySet().iterator(); iter.hasNext();) {
      attributeName = (String) iter.next();
      trimmedHeaderText = trimHeaderText((String) columnInfos.get(attributeName));
      columnInfos.put(attributeName, trimmedHeaderText);
   * Trims one single header text. Omit empty strings. Convert sub-strings to lower case.
   * Convert first char of sub-strings to upper case.
   * Example: "Product Price in EURO" ->"ProductPriceInEuro"
  private String trimHeaderText(String headerText) {
    StringBuffer newHeaderText = new StringBuffer();
    String token;
    StringTokenizer tokenizer = new StringTokenizer(headerText.trim());
    while (tokenizer.hasMoreTokens()) {
      token = tokenizer.nextToken();
      newHeaderText.append(token.substring(0, 1).toUpperCase());
      newHeaderText.append(token.substring(1).toLowerCase());
    return newHeaderText.toString();
  // private member variable for storing instance of an opened popup window.  
  private IWDWindow excelLinkWindow;
public void onActionExportToExcel(com.sap.tc.webdynpro.progmodel.api.IWDCustomEvent wdEvent )
    //@@begin onActionExportToExcel(ServerEvent)
     wdThis.wdGetExcelExportCompInterface().exportToExcel2003(
            wdContext.nodeAddress(),
            getProductColumnInfos());     
            //wdContext.nodeCustomer().nodeAddress()
    //@@end
   * The following code section can be used for any Java code that is
   * not to be visible to other controllers/views or that contains constructs
   * currently not supported directly by Web Dynpro (such as inner classes or
   * member variables etc.). </p>
   * Note: The content of this section is in no way managed/controlled
   * by the Web Dynpro Designtime or the Web Dynpro Runtime.
  //@@begin others
      columnInfosMap.put(IPrivateTableCompBasketView.IProductsElement.QUANTITY, "Quantity");
      columnInfosMap.put(IPrivateTableCompBasketView.IProductsElement.ARTICLE, "Article");
      columnInfosMap.put(IPrivateTableCompBasketView.IProductsElement.COLOR, "Color");
      columnInfosMap.put(IPrivateTableCompBasketView.IProductsElement.PRICE, "Price in EURO");
      columnInfosMap.put(
      IPrivateTableCompBasketView.IProductsElement.TOTAL__PER__ARTICLE,
       "Total Per Article In Euro");
      return columnInfosMap;
if i can modify the code so that it read from behind and when it reached the "/" it stop and insert the string for the header

Answer 1

Check this
https://forums.sdn.sap.com/click.jspa?searchID=870698&messageID=292922
/people/alfred.barzewski/blog/2005/07/27/new-samples-and-tutorials-for-web-dynpro-programming
Regards, Anilkumar