o

The o:selectItemGroups is an extension of UISelectItems which allows you to iterate over a nested collection representing groups of select items. This is basically the UIComponent counterpart of jakarta.faces.model.SelectItemGroup.

Usage

Below example assumes a List<Category> as value wherein Category in turn has a List<Product>.

 <h:selectOneMenu value="#{bean.selectedProduct}" converter="omnifaces.SelectItemsConverter">
     <f:selectItem itemValue="#{null}" />
     <o:selectItemGroups value="#{bean.categories}" var="category" itemLabel="#{category.name}">
         <f:selectItems value="#{category.products}" var="product" itemLabel="#{product.name}" />
     </o:selectItemGroups>
 </h:selectOneMenu>