Whats the most elegant way to add two numbers that are Optional

Question

I need to perform an add operation on two big decimals that are wrapped optionals:

Optional ordersTotal;
Optional newOrder;
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Answer 1

Optional and Stream here do not fit together elegantly.

The best in java 8 is:

ordersTotaI = !ordersTotaI.isPresent() ? newOrder
         : !newOrder.isPresent() ? ordersTotaI
         : Optional.of(ordersTotaI.get().add(newOrder.get()));

However the good news is, that java 9 will add some nice (and also ugly) functionality to Optional.