How can I traverse Try<List<String>> using fluent API?

[d3bt3ch]

How can I traverse Try<List<String>> using fluent API? Please consider the following code snippet.

public List<String> foo() {
}

var v = Try.of(() -> foo()) 
        .??

I want to traverse the list and do some transformations.

[pivovarit]

Try doesn't apply any special treatment to the type of object it holds, so it's fine to iterate it inside one of generic Try methods:

Try.of(() -> foo())
  .map(strings -> strings.map(String::toUpperCase))
  .onSuccess(strings -> {
      strings.forEach(System.out::println);
  });

[d3bt3ch]

I would like to flatten the list so that multiple transformations can be applied. Can it be converted to a stream?

[pivovarit]

Not sure I'm following, you want to have List<Try<String>> instead of Try<List<String>>?

[d3bt3ch]

Precisely, yes.

[pivovarit]

Then you need to simply isolate each operation into a separate Try:

foo().map(s -> Try.of(() -> ...))

[d3bt3ch]

foo() result also needs to be a Try