public abstract class JsonResourceReference<T>
extends org.apache.wicket.request.resource.ResourceReference

A resource that serves JSON for stateless . You have to mount at application init like. E.g.

        mountResource(CATEGORIES_JSON, new JsonResourceReference("categories") {
                        
                        private static final long serialVersionUID = 1L;
        
                        protected ChoiceProvider getChoiceProvider() {
                                return CategoriesTextChoiceProvider.getInstance();
                        }
                });
                
 

and then on component you add

        Select2MultiChoice c = new Select2MultiChoice("categories", new PropertyModel>(searchBean, "translations"), CategoriesTextChoiceProvider.getInstance());
        c.getSettings().setStateless(true);
        c.getSettings().setMountPath(Application.CATEGORIES_JSON);