public int doStartTag() throws JspException {
    try {
      HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
      ModuleContext context = (ModuleContext) request.getSession().getAttribute("context");

      String viewObject = request.getParameter("viewObject");
      viewObject = (viewObject == null || viewObject.equals("")) ? "xava_view" : viewObject;
      View view = (View) context.get(request, viewObject);

      MetaReference metaReference = view.getMetaReference(reference).cloneMetaReference();
      metaReference.setName(reference);
      String prefix = request.getParameter("propertyPrefix");
      prefix = prefix == null ? "" : prefix;
      String application = request.getParameter("application");
      String module = request.getParameter("module");
      String referenceKey = Ids.decorate(application, module, prefix + reference);
      request.setAttribute(referenceKey, metaReference);
      String editorURL =
          "reference.jsp?referenceKey="
              + referenceKey
              + "&onlyEditor=true&frame=false&composite=false&descriptionsList=true";
      String editorPrefix = Module.isPortlet() ? "/WEB-INF/jsp/xava/" : "/xava/";
      try {
        pageContext.include(editorPrefix + editorURL);
      } catch (ServletException ex) {
        Throwable cause = ex.getRootCause() == null ? ex : ex.getRootCause();
        log.error(cause.getMessage(), cause);
        pageContext.include(editorPrefix + "editors/notAvailableEditor.jsp");
      } catch (Exception ex) {
        log.error(ex.getMessage(), ex);
        pageContext.include(editorPrefix + "editors/notAvailableEditor.jsp");
      }
    } catch (Exception ex) {
      log.error(ex.getMessage(), ex);
      throw new JspException(XavaResources.getString("descriptionsList_tag_error", reference));
    }
    return SKIP_BODY;
  }
  /** This method generates the output given a context and output stream */
  public boolean generate(XPathContext context, ProgramWriter out) {
    try {
      String collectionName = Strings.firstUpper(collection.getName());

      if (ejb) {
        out.print(" \n\t/**\n\t * @ejb:interface-method\n\t */");
      }
      out.print(" \n\tpublic java.util.Collection get");
      out.print(collectionName);
      out.print("() {");
      if (ejb) {
        out.print(
            " \n\t\tboolean cmtActivated = false;\n\t\tif (!org.openxava.hibernate.XHibernate.isCmt()) {\n\t\t\torg.openxava.hibernate.XHibernate.setCmt(true);\n\t\t\tcmtActivated = true;\n\t\t}");
      }
      out.print(" \n\t\ttry {");

      MetaCalculator calculator = collection.getMetaCalculator();
      String calculatorClass = calculator.getClassName();

      out.print(" \t\t\n\t\t\t");
      out.print(calculatorClass);
      out.print(" ");
      out.print(collection.getName());
      out.print("Calculator= (");
      out.print(calculatorClass);
      out.print(")\n\t\t\t\tgetMetaModel().getMetaCollection(\"");
      out.print(collection.getName());
      out.print("\").getMetaCalculator().createCalculator();");

      Iterator itSets = calculator.getMetaSetsWithoutValue().iterator();
      while (itSets.hasNext()) {
        MetaSet set = (MetaSet) itSets.next();
        String propertyNameInCalculator = Strings.firstUpper(set.getPropertyName());
        String propertyNameFrom = set.getPropertyNameFrom();
        MetaProperty p = metaModel.getMetaProperty(propertyNameFrom);
        if (propertyNameFrom.indexOf('.') >= 0) {
          if (p.isKey() || p.getMetaModel() instanceof MetaAggregate) {
            propertyNameFrom = Strings.firstUpper(Strings.change(propertyNameFrom, ".", "_"));
          } else {
            StringTokenizer st = new StringTokenizer(propertyNameFrom, ".");
            String ref = st.nextToken();
            String pro = st.nextToken();
            propertyNameFrom = Strings.firstUpper(ref) + "().get" + Strings.firstUpper(pro);
          }
        } else {
          propertyNameFrom = Strings.firstUpper(propertyNameFrom);
        }
        String getPropertyFrom = "boolean".equals(p.getTypeName()) ? "is" : "get";
        String value = set.getValue();
        if (set.hasValue()) {

          out.print(" \n\t\t\t");
          out.print(collection.getName());
          out.print("Calculator.set");
          out.print(propertyNameInCalculator);
          out.print("(\"");
          out.print(value);
          out.print("\");");

        } else {

          out.print("  \t\n\t\t\t");
          out.print(collection.getName());
          out.print("Calculator.set");
          out.print(propertyNameInCalculator);
          out.print("(");
          out.print(getPropertyFrom);
          out.print(propertyNameFrom);
          out.print("());");
        }
      } // else/sets
      if (IModelCalculator.class.isAssignableFrom(Class.forName(calculatorClass))) {

        out.print(" \n\t\t\t\t");
        out.print(collection.getName());
        out.print("Calculator.setModel(this);");
      }
      if (IEntityCalculator.class.isAssignableFrom(Class.forName(calculatorClass))) {

        out.print(" \n\t\t\t\t");
        out.print(collection.getName());
        out.print("Calculator.setEntity(this);");
      }
      if (IJDBCCalculator.class.isAssignableFrom(Class.forName(calculatorClass))) {

        out.print(" \n\t\t\t\t");
        out.print(collection.getName());
        out.print("Calculator.setConnectionProvider(getPortableContext());");
      }
      String calculateValueSentence = collection.getName() + "Calculator.calculate()";

      out.print(" \n\t\t\treturn ");
      out.print(Generators.generateCast("java.util.Collection", calculateValueSentence));
      out.print(
          ";\n\t\t}\n\t\tcatch (Exception ex) {\n\t\t\tex.printStackTrace();\n\t\t\tthrow new ");
      out.print(getException());
      out.print("(XavaResources.getString(\"generator.calculate_value_error\", \"");
      out.print(collection.getName());
      out.print("\", \"");
      out.print(metaModel.getName());
      out.print("\", ex.getLocalizedMessage()));\n\t\t}");
      if (ejb) {
        out.print(
            " \n\t\tfinally {\n\t\t\tif (cmtActivated) {\n\t\t\t\torg.openxava.hibernate.XHibernate.setCmt(false);\n\t\t\t}\n\t\t}");
      }
      out.print(" \t\t\t\t\n\t}");

    } catch (Exception e) {
      System.out.println("Exception: " + e.getMessage());
      e.printStackTrace();
      return false;
    }
    return true;
  }
  protected void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    try {
      Locales.setCurrent(request);
      if (Users.getCurrent() == null) { // for a bug in websphere portal 5.1 with Domino LDAP
        Users.setCurrent((String) request.getSession().getAttribute("xava.user"));
      }
      request.getParameter("application"); // for a bug in websphere 5.1
      request.getParameter("module"); // for a bug in websphere 5.1
      Tab tab = (Tab) request.getSession().getAttribute("xava_reportTab");
      int[] selectedRowsNumber =
          (int[]) request.getSession().getAttribute("xava_selectedRowsReportTab");
      Map[] selectedKeys = (Map[]) request.getSession().getAttribute("xava_selectedKeysReportTab");
      int[] selectedRows = getSelectedRows(selectedRowsNumber, selectedKeys, tab);
      request.getSession().removeAttribute("xava_selectedRowsReportTab");
      Integer columnCountLimit =
          (Integer) request.getSession().getAttribute("xava_columnCountLimitReportTab");
      request.getSession().removeAttribute("xava_columnCountLimitReportTab");

      setDefaultSchema(request);
      String user = (String) request.getSession().getAttribute("xava_user");
      request.getSession().removeAttribute("xava_user");
      Users.setCurrent(user);
      String uri = request.getRequestURI();
      if (uri.endsWith(".pdf")) {
        InputStream is;
        JRDataSource ds;
        Map parameters = new HashMap();
        synchronized (tab) {
          tab.setRequest(request);
          parameters.put("Title", tab.getTitle());
          parameters.put("Organization", getOrganization());
          parameters.put("Date", getCurrentDate());
          for (String totalProperty : tab.getTotalPropertiesNames()) {
            parameters.put(totalProperty + "__TOTAL__", getTotal(request, tab, totalProperty));
          }
          TableModel tableModel = getTableModel(request, tab, selectedRows, false, true, null);
          tableModel.getValueAt(0, 0);
          if (tableModel.getRowCount() == 0) {
            generateNoRowsPage(response);
            return;
          }
          is = getReport(request, response, tab, tableModel, columnCountLimit);
          ds = new JRTableModelDataSource(tableModel);
        }
        JasperPrint jprint = JasperFillManager.fillReport(is, parameters, ds);
        response.setContentType("application/pdf");
        response.setHeader(
            "Content-Disposition", "inline; filename=\"" + getFileName(tab) + ".pdf\"");
        JasperExportManager.exportReportToPdfStream(jprint, response.getOutputStream());
      } else if (uri.endsWith(".csv")) {
        String csvEncoding = XavaPreferences.getInstance().getCSVEncoding();
        if (!Is.emptyString(csvEncoding)) {
          response.setCharacterEncoding(csvEncoding);
        }
        response.setContentType("text/x-csv");
        response.setHeader(
            "Content-Disposition", "inline; filename=\"" + getFileName(tab) + ".csv\"");
        synchronized (tab) {
          tab.setRequest(request);
          response
              .getWriter()
              .print(
                  TableModels.toCSV(
                      getTableModel(request, tab, selectedRows, true, false, columnCountLimit)));
        }
      } else {
        throw new ServletException(
            XavaResources.getString("report_type_not_supported", "", ".pdf .csv"));
      }
    } catch (Exception ex) {
      log.error(ex.getMessage(), ex);
      throw new ServletException(XavaResources.getString("report_error"));
    } finally {
      request.getSession().removeAttribute("xava_reportTab");
    }
  }