private void applyValue(String property, String value) throws CoreException {
   if (fCurrentCategoryDefinition == null) return;
   if (property.equals(PROPERTY_NAME)) {
     String oldName = fCurrentCategoryDefinition.getName();
     fCurrentCategoryDefinition.setName(value);
     bringFeatures(oldName);
   } else if (property.equals(PROPERTY_TYPE)) fCurrentCategoryDefinition.setLabel(value);
   else if (property.equals(PROPERTY_DESC)) {
     if (value == null || value.length() == 0) {
       fCurrentCategoryDefinition.setDescription(null);
     } else {
       ISiteDescription siteDesc = fCurrentCategoryDefinition.getDescription();
       if (siteDesc == null) {
         siteDesc =
             fCurrentCategoryDefinition
                 .getModel()
                 .getFactory()
                 .createDescription(fCurrentCategoryDefinition);
         siteDesc.setText(value);
         fCurrentCategoryDefinition.setDescription(siteDesc);
       } else {
         siteDesc.setText(value);
       }
     }
   }
 }
 private void handleAddCategoryDefinition() {
   String name =
       NLS.bind(
           PDEUIMessages.CategorySection_newCategoryName, Integer.toString(++newCategoryCounter));
   while (categoryExists(name)) {
     name =
         NLS.bind(
             PDEUIMessages.CategorySection_newCategoryName,
             Integer.toString(++newCategoryCounter));
   }
   String label =
       NLS.bind(
           PDEUIMessages.CategorySection_newCategoryLabel, Integer.toString(newCategoryCounter));
   ISiteCategoryDefinition categoryDef = fModel.getFactory().createCategoryDefinition();
   try {
     categoryDef.setName(name);
     categoryDef.setLabel(label);
     fModel.getSite().addCategoryDefinitions(new ISiteCategoryDefinition[] {categoryDef});
   } catch (CoreException e) {
     PDEPlugin.logException(e);
   }
   fCategoryViewer.setSelection(new StructuredSelection(categoryDef), true);
 }