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Chaining Maybe in rxjava for "else" or "coallesce"

I'm new to rxjava, so I apologize if this is a stupid question. I have two Maybes (call them A and B) that I want to compose in such a way as to get the 3rd option.

If A succeeds, I want my composite to succeed with the same value. If the errors are A, I want my composite error with the same throws. If A completes without emitting values, I want to then delegate to B.

Is there an easy way to achieve this?

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If you don't want specific errors in A, you can use the following:



A
.onErrorResumeNext(Observable.empty())
.switchIfEmpty(B)
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