Examples of SelectItemGroup

javax.faces.model.SelectItemGroup

SelectItemGroup is a subclass of {@link SelectItem} thatidentifies a set of options that will be made available as a subordinate "submenu" or "options list", depending upon the requirements of the {@link UISelectMany} or {@link UISelectOne} renderer that is actually used.In general, the value property of this instance will be ignored, and the label property of this instance will be used to label the submenu.

Although it is feasible to incorporate {@link SelectItemGroup} instancesin he selectItems property of this instance (thereby creating a data structure suitable for cascading submenus), some renderers may place restrictions on the level of nesting they support. For example, HTML based renderers that create an <select> element will typically render this instance as an <optgroup> element, but the HTML 4.01 Specification disallows nested option groups.

    
    protected void encodeOption(FacesContext context, SelectOneMenu menu, SelectItem option, Object values, Object submittedValues, Converter converter) throws IOException {
        ResponseWriter writer = context.getResponseWriter();
        
        if(option instanceof SelectItemGroup) {
            SelectItemGroup group = (SelectItemGroup) option;            
            for(SelectItem groupItem : group.getSelectItems()) {
                encodeOption(context, menu, groupItem, values, submittedValues, converter);
            }
        }
        else {
            String itemValueAsString = getOptionAsString(context, menu, converter, option.getValue());

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Examples of SelectItemGroup

Examples of javax.faces.model.SelectItemGroup