private static Object toExternalNumber ( Object value ) { Class < ? > valueType = value == null ? null : value . getClass ( ) ; return ! ( valueType != null && Number . class . isAssignableFrom ( valueType ) ) ? null : valueType . equals ( BigDecimal . class ) ? toExternalNumber ( ( BigDecimal ) value ) : valueType . equals ( Long . class ) ? toExternalNumber ( new BigDecimal ( ( Long ) value ) ) : value ; }
If the given value is a number returns an object equal to its external form . Otherwise returns null .