Selectonechoice current index

Valuechangelistener does not get fired on when selectonechoice default value is selected e.g. Select. Hence we should have additional button and in that button we should evaluate the index of select one choice as below public String goButtonAction(ActionEvent actionEvent) { // Add event code here... Integer selectedPlatformIndex = (Integer)JSFUtils.resolveExpression("#{row.bindings.PlatformName_lov.inputValue}"); System.out.println("The gobutton clicked value: >>>>>>>>>>>>>>>>>>"+selectedPlatformIndex.toString()); if(selectedPlatformIndex == 0 ){ showMessage("Please select a Platform"); return null; } else return "gotoRelease"; }