I have used the solution from this answer: Get list of JSON objects with Spring RestTemplate It works perfectly. It doing exactly what I need.
ProcessDefinition[] response = restTemplate.getForObject(url, ProcessDefinition[].class);
Is it enought:
return Arrays.asList(response);
or will be better this way:
return Arrays.asList(Optional.ofNullable(response).orElse(new ProcessDefinition[0]));
PS Sorry for starting the new topic, but my karma does not allow me to comment the answer.
Yes, the result of
ProcessDefinition[] response = restTemplate.getForObject(url, ProcessDefinition[].class);
can be null
if HTTP response was empty (not []
, but totally empty).
So it is safer to check it if you are not sure that HTTP response never be empty.
return Optional.ofNullable(response).map(Arrays::asList).orElseGet(ArrayList::new)
or
return Optional.ofNullable(response).map(Stream::of).orElseGet(Stream::empty)
if you need a stream.
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