question: put existing or newly-instantiated attribute type in the model concode_field_sep PlaceHolder placeHolder concode_field_sep String handleSubmit concode_elem_sep Collection<String> getDatatypes concode_elem_sep Collection<String> getHandlers concode_elem_sep void showForm
target: LocationAttributeType function ( @ RequestParam ( value = "srini_string" , required = false ) LocationAttributeType arg0 ) { if ( arg0 == null ) { arg0 = new LocationAttributeType ( ) ; } return arg0 ; }