Home Map Mono<Resources<Resource<T>>> to Mono<List<T>>?
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Map Mono<Resources<Resource<T>>> to Mono<List<T>>?

user899
1#
user899 Published in May 20, 2018, 10:13 am

In my reactive Java 9 Spring Boot 2 with Spring HATEOAS application, I have a REST API returning Mono<Resources<Resource<T>>>. In the application layer, I'd like the data to be Mono<List<T>> but how can I concisely map Mono<Resources<Resource<T>>> to Mono<List<T>>?

I was expecting something like:

public Mono<List<Order>> orders() {
    return rest.orders()
        .flatmap(List::stream)
        .map(r -> r.getContent())
        .collect(Collectors.toList());
}

but this fails to compile because List does not define List.stream(Resources<Resource<Order>>. The rest.orders() returns Mono<Resources<Resource<Order>>>. Any ideas?

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