CODEWITHSUNDEEP
rx-java
Martin
Martin

Reputation: 3753

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

I'm fairly new to rxjava, so apologies if this is a silly question. I have two Maybes (call them A and B) that I want to compose in such a way that I get a 3rd Maybe.

If A succeeds, I want my composite to succeed with that same value. If A errors, I want my composite to error with that same throwable. If A completes without emitting a value, I want to then delegate to B.

Is there an easy way to achieve this?

Upvotes: 4

Views: 541

Answers (1)

Tassos Bassoukos
Tassos Bassoukos

Reputation: 16142

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

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

Upvotes: 4

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