The #{component} is an implicit EL variable referring the current UIComponent in EL scope (see also implicit EL objects). You can usually only refer it in component’s HTML attribute or in template text children. E.g. in case of <h:inputText> it will reference an instance of UIInput class which has among others an isValid() method. <h:inputText … Read more
You can use the following code: public UIComponent findComponent(final String id) { FacesContext context = FacesContext.getCurrentInstance(); UIViewRoot root = context.getViewRoot(); final UIComponent[] found = new UIComponent[1]; root.visitTree(new FullVisitContext(context), new VisitCallback() { @Override public VisitResult visit(VisitContext context, UIComponent component) { if (component != null && id.equals(component.getId())) { found[0] = component; return VisitResult.COMPLETE; } return VisitResult.ACCEPT; } … Read more