public String getKeyColumnsAsString() throws XavaException {
   StringBuffer r = new StringBuffer();
   Collection columns = new HashSet();
   for (Iterator it = getMetaModel().getAllKeyPropertiesNames().iterator(); it.hasNext(); ) {
     String pr = (String) it.next();
     String column = getColumn(pr);
     if (columns.contains(column)) continue;
     columns.add(column);
     r.append(column);
     r.append(' ');
   }
   return r.toString().trim();
 }
 private InputStream getReport(
     HttpServletRequest request,
     HttpServletResponse response,
     Tab tab,
     TableModel tableModel,
     Integer columnCountLimit)
     throws ServletException, IOException {
   StringBuffer suri = new StringBuffer();
   suri.append("/xava/jasperReport");
   suri.append("?language=");
   suri.append(Locales.getCurrent().getLanguage());
   suri.append("&widths=");
   suri.append(Arrays.toString(getWidths(tableModel)));
   if (columnCountLimit != null) {
     suri.append("&columnCountLimit=");
     suri.append(columnCountLimit);
   }
   response.setCharacterEncoding(XSystem.getEncoding());
   return Servlets.getURIAsStream(request, response, suri.toString());
 }
 private String changePropertiesByColumns(String source, boolean qualified) throws XavaException {
   StringBuffer r = new StringBuffer(source);
   int i = r.toString().indexOf("${");
   int f = 0;
   while (i >= 0) {
     f = r.toString().indexOf("}", i + 2);
     if (f < 0) break;
     String property = r.substring(i + 2, f);
     String column = "0"; // thus it remained if it is calculated
     if (!getMetaModel().isCalculated(property)) {
       column =
           Strings.isModelName(property)
               ? getTable(property)
               : qualified ? getQualifiedColumn(property) : getColumn(property);
     }
     r.replace(i, f + 1, column);
     i = r.toString().indexOf("${");
   }
   return r.toString();
 }
 public String changePropertiesByCMPAttributes(String source) throws XavaException {
   StringBuffer r = new StringBuffer(source);
   int i = r.toString().indexOf("${");
   int f = 0;
   while (i >= 0) {
     f = r.toString().indexOf("}", i + 2);
     if (f < 0) break;
     String property = r.substring(i + 2, f);
     String cmpAttribute = null;
     if (property.indexOf('.') >= 0) {
       cmpAttribute = "o._" + Strings.firstUpper(Strings.change(property, ".", "_"));
     } else {
       MetaProperty metaProperty = getMetaModel().getMetaProperty(property);
       if (metaProperty.getMapping().hasConverter()) {
         cmpAttribute = "o._" + Strings.firstUpper(property);
       } else {
         cmpAttribute = "o." + property;
       }
     }
     r.replace(i, f + 1, cmpAttribute);
     i = r.toString().indexOf("${");
   }
   return r.toString();
 }